The Journal of Early Adolescence http://jea.sagepub.com/ The Role of Individual- and Macro-Level Social Determinants on Young Adolescents' Psychosomatic Complaints Veronika Ottova, Michael Erhart, Wilma Vollebergh, Gyöngyi Kökönyei, Antony Morgan, Inese Gobina, Helena Jericek, Franco Cavallo, Raili Välimaa, Margarida Gaspar de Matos, Tania Gaspar, Christina W. Schnohr, Ulrike Ravens-Sieberer and and the Positive Health Focus Group The Journal of Early Adolescence 2012 32: 126 originally published online 14 November 2011 DOI: 10.1177/0272431611419510 The online version of this article can be found at: http://jea.sagepub.com/content/32/1/126 Published by: http://www.sagepublications.com Additional services and information for The Journal of Early Adolescence can be found at: Email Alerts: http://jea.sagepub.com/cgi/alerts Subscriptions: http://jea.sagepub.com/subscriptions Reprints: http://www.sagepub.com/journalsReprints.nav Permissions: http://www.sagepub.com/journalsPermissions.nav Citations: http://jea.sagepub.com/content/32/1/126.refs.html >> Version of Record - Feb 22, 2012 OnlineFirst Version of Record - Nov 14, 2011 What is This? Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 419510 0Ottova et al.Journal of Early Adolescence © The Author(s) 2012 JEA32110.1177/027243161141951 Reprints and permission: sagepub.com/journalsPermissions.nav The Role of Individual- and Macro-Level Social Determinants on Young Adolescents’ Psychosomatic Complaints Journal of Early Adolescence 32(1) 126­–158 © The Author(s) 2012 Reprints and permission: sagepub.com/journalsPermissions.nav DOI: 10.1177/0272431611419510 http://jea.sagepub.com Veronika Ottova1, Michael Erhart1, Wilma Vollebergh2, Gyöngyi Kökönyei3,4, Antony Morgan5, Inese Gobina6, Helena Jericek7, Franco Cavallo8, Raili Välimaa9, Margarida Gaspar de Matos10,11, Tania Gaspar10,11, Christina W. Schnohr12, Ulrike Ravens-Sieberer1, and the Positive Health Focus Group 1 University Medical Center Hamburg-Eppendorf, Hamburg, Germany University of Utrecht, Utrecht, Netherlands 3 Eotvos Lorand University, Budapest, Hungary 4 National Institute of Child Health, Hungary 5 National Institute of Health and Clinical Excellence, London, UK 6 Riga Stradins University, Riga, Latvia 7 Institute of Public Health, Ljubljana, Slovenia 8 University of Torino, Torino, Italy 9 University of Jyväskylä, Jyväskylä, Finland 10 FMH/Lisbon Technical University, Lisbon, Portugal 11 CMDT/IHMT/New University of Lisbon, Lisbon, Portugal 12 University of Copenhagen, Copenhagen, Denmark 2 Corresponding Author: Ulrike Ravens-Sieberer, Department of Child and Adolescent Psychiatry, Psychotherapy, and Psychosomatics, University Medical Center Hamburg-Eppendorf, Martinistr. 52, Hamburg 20246, Germany Email: Ravens-Sieberer@uke.uni-hamburg.de Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 127 Ottova et al. Abstract This study examines the social determinants of psychosomatic complaints in young adolescents. Using data from the Health Behaviour in School-aged Children (HBSC) study, psychosomatic complaints are studied in 98,773 adolescents (11- and 13-year-olds; 48% 11-year-olds, 52% 13-year-olds; 52% females, 48% males) from 34 European countries. Individual-level determinants, including family-, peer- and school-related factors as well as countrylevel determinants (Human Development Index [HDI]) are considered. In line with existing evidence, results revealed more psychosomatic complaints in young adolescents experiencing stress inducing familial-, peer- and schoolrelated factors. Negative effects of poor friendships, negative class climate, school pressure, and high media use were more pronounced for girls. After controlling for these factors, a higher HDI was related to a lower risk for psychosomatic complaints. Gender-specific intervention programs should aim at improving the quality of relationships, especially among peers, to prevent psychosomatic complaints among young adolescents. Keywords well-being, family, peers, school context, stressors Background Psychosomatic complaints are important indicators of psychosocial health (Piko, 2007) and well-being (Berntsson, Köhler, & Gustafsson, 2001). By definition, they are “subjective physical complaints (headache, stomach ache, back ache, and dizziness) as well as psychological complaints (feeling low, irritability, nervousness, and difficulty in getting to sleep)” that are not caused by an underlying physical disease (Natvig, Albrektsen, Anderssen, & Qvarntstrøm, 1999, p. 362). Findings from studies with children and adolescents provide support for the relationship between psychosomatic complaints and poor life satisfaction, depression (Piko, 2006), negative moods (Jellesma, Rieffe, Terwogt, & Kneepkens, 2006), unhappiness (Natvig, Albrektsen, & Qvarnstrom, 2003), and a lower health perception (Piko, 2007). The period of adolescence is a vulnerable time of developmental changes which are highly susceptible to psychosomatic complaints. Early adolescence is an important developmental period as it marks the transition between childhood and adolescence. It is characterized by increased desire for “autonomy from adult control [. . .], peer orientation, self-focus, self-consciousness, salience-of-identity issues; concern over sexual Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 128 Journal of Early Adolescence 32(1) relationships; and capacity for abstract cognitive activity” (Eccles, Lord, & Midgley, 1991, p. 534). Eccles and Midgley (1990) have suggested various reasons for the negative changes which begin during early adolescence, including “intrapsychic upheaval” which leads to motivational and behavioral problems, the simultaneous timing of school transition and major developmental changes, and the quality of school environments (p. 135). The last 20 years has seen an increase in the number of cross-cultural studies on child and adolescent development across cultures (Gielen & Roopnarine, 2004). Most frequently, these have been prevalence studies comparing age and gender differences; however, more recently, studies have taken account of important social contexts, such as the family, peers, and school. Psychosomatic complaints are thought to be stress related. Frequent or sustained stress leads to emotional and physiological responses, which have a clear effect on the development of frequent complaints (Brosschot, 2002). Both individual-level and country-level factors, such as the nation’s wealth (gross national product) or its distribution (Gini coefficient), play a role in children’s well-being (Holstein et al., 2009). The present article extends this knowledge by examining the relative importance of the social determinants on health complaints in young adolescents. The robustness of the Health Behaviour in School-aged Children (HBSC) study (large sample size, multinational data) provides an opportunity to investigate the impact of both individual- and country-level factors on psychosomatic complaints across Europe and North America. Psychosomatic Complaints in Young Adolescents Research has demonstrated an increased risk for psychosomatic complaints in the presence of psychosocial stressors, such as parental conflicts (Hurrelmann, Engel, Holler, & Nordlohne, 1988), bullying, lack of acceptance by peers, lack of support from parents and teachers (Gerber & Pühse, 2008; Natvig et al., 1999). Given the increase in psychosomatic complaints (Berntsson & Köhler, 2001; Hagquist, 2009; Karvonen, Vikat, & Rimpelä, 2005), it is important to gain a better understanding of the distribution and origin of this association. The most common symptoms reported by young adolescents are back pain, neck pain, and headache (Bandell-Hoekstra et al., 2001; Hakala, Rimpelä, Salminen, Virtanen, & Rimpelä, 2002; Haugland, Wold, Stevenson, Aaroe, & Woynarowska, 2001; Jellesma et al., 2006). Other complaints frequently reported are stomach complaints and loss of appetite (Berntsson et al., 2001; Jellesma et al., 2006). Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 129 Ottova et al. Evidence suggests age and gender to be important factors in reported complaints. Studies show that older adolescents have higher rates of complaints (Cavallo et al., 2006; Ghandour, Overpeck, Huang, Kogan, & Scheidt, 2004; Haugland et al., 2001; Karademas, Peppa, Fotiou, & Kokkevi, 2008; Tanaka, Tamai, Terashima, Takenaka, & Tanaka, 2000) and that gender differences increase with age. The highest rates of psychosomatic complaints are generally reported by 15-year-old girls (Haugland et al., 2001; West & Sweeting, 2003). However, while older girls report more complaints than their younger peers, older boys tend to report fewer complaints than younger ones (Marschall, 1989). There is clear evidence that boys and girls differ in the types of psychosomatic complaints they commonly report (Natvig et al., 1999). The frequency and intensity of complaints is higher in girls and they generally are more likely to report having had more than two complaints at least once a week (Cavallo et al., 2006). Evidence on the relationship between stress and health complaints has been confirmed by a number of studies; however, less frequent are the studies of young people (Sundblad, Jansson, Saartok, Renström, & Engström, 2008). Research also suggests that psychosocial complaints may be a stress reaction to psychosocial tension (Holler-Nowitzki, 1994). Studies among adults have pointed to an association between workplace psychosocial factors and stress (Haukka et al., 2010). Likewise, increasing demands, academic pressure at school, and fear of failure may result in the experience of stress among young people (Eriksson & Sellström, 2010; Hurrelmann et al., 1988). Stress increases with age, and girls are more affected than boys (Sundblad et al., 2008). Such risk factors can of course be offset by the presence of protective factors. Torsheim and Wold (2001) showed an inverse relationship between stress and sense of coherence, suggesting that protective factors (or assets) have a role to play in health and well-being during adolescence. Clearly, psychosomatic complaints are determined by a number of factors operating through social stress at a micro (individual) level, such as family problems, peer pressure, unsuccessful coping strategies (Brill, Patel, & MacDonald, 2001), as well as factors at the macro (societal or national) level (e.g., Holstein et al., 2009; Torsheim, Currie, Boyce, & Samdal, 2006). The complexity of these determinants and the rationale for their inclusion in the present study are described below. Individual-Level Factors Related to Psychosomatic Complaints Familial context. Studies confirm an association between adolescents’ health and well-being and family and school factors (Gaspar, Matos, Ribeiro, Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 130 Journal of Early Adolescence 32(1) Leal, & Ferreira, 2009; Karademas et al., 2008), including good family climate and high social support (Wille, Bettge, Ravens-Sieberer, & the BELLA Study Group, 2008), positive family, and school climate (Karademas et al., 2008). In contrast, family conflicts and stress were found to be associated with more health problems (Karvonen et al., 2005). Poor communication with parents emerged as more strongly associated with psychological health complaints in adolescents than poor peer communication (Moreno et al., 2009). Family structure (in particular, single-parent families) and low educational level of the parents have an additional negative impact on children’s health (Berntsson & Köhler, 2001; Brolin Laftman & Östberg, 2006; Östberg, Alfven, & Hjern, 2006). Peer relations. Research into peer relations has identified an association between harassment and recurrent pain (Hjern, Alfven, & Östberg, 2008), and studies have shown that higher rates of health complaints are experienced by victims as well as by perpetrators of bullying (Gini, 2008; Richter, Bowles, Melzer, & Hurrelmann, 2007). Girls who experience bullying report headaches, back aches, and morning fatigue more frequently than those with no such negative experiences (Ghandour et al., 2004). Moreno et al. (2009) also showed that good peer communication with same-sex friends is associated with lower number of complaints. School environment. School and extracurricular activities, such as homework, clubs, friendships, and other social activities, are some of the key factors for children’s psychosocial development (Samdal, Nutbeam, Wold, & Kannas, 1998; Ravens-Sieberer, Freeman, Kokonyei, Thomas, & Erhart, 2009). Poor perception of the school environment can be a major stressor during the school years in young adolescents (Hjern et al., 2008). Eccles & Midgley (1990) showed a marked decrease in self-confidence in school achievement and mastery of school work in the transition from childhood into adolescence. Other studies have confirmed an association between school-related stress, such as feeling pressured by school work, and psychosomatic complaints (Gerber & Pühse, 2008; Karademas et al., 2008; Natvig et al., 1999). Older adolescents experience increased school pressure (Cavallo et al., 2006). Poor academic achievement has been shown to be associated with nearly a threefold greater chance of poor or fair self-perceived health (Piko, 2007). Karvonen et al. (2005) found that both—the absence of as well as academic demands—are associated with psychosomatic health complaints. Other authors found that factors such as teacher support or resources at school play an even greater role (Eriksson & Sellström, 2010). In fact, several studies have confirmed a protective effect of social support from peers (Natvig et al., 1999; Santinello, Vieno, & De Vogli, 2009). Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 131 Ottova et al. Physical activity and sedentary behaviors. Studies show that children who engage in sedentary behaviors, such as playing TV games (Tanaka et al., 2000), computer-related activities (Hakala, Rimpelä, Saarni, & Salminen, 2006), and screen-based activities in general (Torsheim et al., 2010), have a higher rate of somatic complaints (Bakoula, Kapi, Veltsista, Kavadias, & Kolaitis, 2006), and the risk for complaints increases with the number of hours spent sedentary (Tanaka et al., 2000). One possible mechanism is that sedentary behaviors sustained over a period of time cause muscle tension which may then lead to pain (Straker et al., 2008; Torsheim et al., 2010). A side effect of many hours spent on screen-based activities is that it potentially reduces the number of hours for parent-child interaction and, in this way, negatively affects child health (Tanaka et al., 2000). A distinct protective effect of physical activity could not be confirmed (Gerber & Pühse, 2008; Ghandour et al., 2004), but it may moderate the relationship between stress and psychosomatic complaints (Haugland, Wold, & Torsheim, 2003). Sundblad et al. (2008) found a correlation between physical activity and positive perceived health. Socioeconomic indicators. Studies have pointed at associations between psychosomatic complaints and sociodemographic risk factors, such as low socioeconomic status (SES), a large family, or single motherhood (Egle, Hoffmann, & Steffens, 1997), and low parental education (Karvonen et al., 2005; Piko & Fitzpatrick, 2007; Sleskova et al., 2006). Unemployment of either mother or father has also been identified as a risk factor for child health (Sleskova et al., 2006), whereby economic stress, rather than social class, was a significant determinant of psychosomatic complaints (Östberg et al., 2006). Still, Torsheim and colleagues (2004) found a uniform pattern between health and social inequalities across 22 countries, suggesting that previous inconsistent findings may in part be an artifact of methodological variance. National Indicators Research on children and adolescents which included national indicators has found that both low household income and high material inequalities are associated with poorer subjective health (Torsheim et al., 2006). Holstein and colleagues (2009) found a relationship between material inequality (measured by the Gini coefficient) and psychosomatic complaints, but not for gross national product (GNP). In contrast, Olsen and Dahl (2007) did not find a significant relationship between the Gini coefficient and health but found one for gross domestic product (GDP). Another study comparing psy- Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 132 Journal of Early Adolescence 32(1) chosomatic complaints in children in five Scandinavian countries revealed largest country differences at the macro level, that is, economic factors, SES, and economic resources of family (Berntsson et al., 2001). Interestingly, despite variations in unemployment rates between the countries, there were no notable country differences in the associations between psychosomatic complaints, SES, family economy, and family type, indicating multidimensional risk factors for psychosomatic complaints and a complex relationship between macro-level factors and individual health. A useful alternative to traditional measures of development, such as GDP which only reflects one dimension, is the Human Development Index (HDI) which covers the following dimensions: knowledge, healthy life, and standard of living (Sagar & Najam, 1998). While a vast majority of research papers on child health have used GDP (or GNP) and/or the Gini coefficient as indicators, none of them has used the Human Development Index (HDI). Research Aims The purpose of this article was to extend previous research on psychosomatic complaints from a stress perspective by investigating social stress factors at an individual and a national (societal) level using a large international sample of young adolescents. The individual-level stress factors included familial factors (family structure, communication with parents), peer relations (bullying, number of close friends), and school context (class climate, academic achievement). Physical activity and sedentary behaviors (media use) were also included in the analyses to control for the effect of health behaviors. In addition, country-level effects were taken into account to further understand the potential relationship between national factors and psychosomatic complaints. Based on previous research outlined above, we chose to use HDI to analyze country-level effects as this multidimensional index covers three relevant dimensions (healthy life, education, and economic aspects) which are measured via life expectancy, adult literacy, and GDP. It is a broad measure of national well-being (Moon, Welch, & Wong, 2005). Currently, a majority of the studies on psychosomatic complaints and stress come from Scandinavian countries (Eriksson & Sellström, 2010; Hjern et al., 2008; Sundblad et al., 2008; Torsheim & Wold, 2001). Relatively little is known about cross-national differences, in particular, on the combined effects of individual- and country-level factors on psychosomatic complaints. On this background, the following hypotheses were formulated and tested. Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 133 Ottova et al. Hypothesis 1: Stable family structure and easy communication with parents is associated with lower rates of psychosomatic complaints (i.e., better health). Hypothesis 2: Good peer relationships (high number of close friends, no or low occurrence of bullying) are associated with lower rates of psychosomatic complaints (i.e., better health). Hypothesis 3: A positive class climate and low pressure at school are associated with lower rates of psychosomatic complaints (i.e., better health). Hypothesis 4: A high HDI is associated with a higher average level of psychosomatic health in a country. Method Participants The sample used in this study was obtained from the 2005/2006 HBSC study. The HBSC study is an international survey conducted every 4 years in a growing number of countries. Data were collected through a school-based survey using classroom-administered self-completion questionnaires in each participating country and region. Data collection and questionnaires were based on a standardized research protocol. Participation in the survey was voluntary, and assurance was provided in relation to confidentiality and anonymity. Each country was required to respect the ethical and legal requirements in their country for this type of survey. The target populations for the study were 11-, 13- and 15-year-old children (Grades 5, 7, and 9). Participating countries were required to include a minimum of 95% of the eligible target population within their sample frame. The samples were drawn using the cluster sampling procedure, whereby the primary sampling unit was school class. The final international file contained 204,534 pupils across 41 countries or regions, consisting of 100,233 (49%) boys and 104,301 (51%) girls, and 66,707 (33%) 11-year-olds, 69,954 (34%) 13-year-olds, and 67,873 (33%) 15-year-olds. The sampling response rates for all the countries in the 2005/2006 HBSC study ranged from 47% to 100% for school/class level and from 34% to 97% at the pupil level. In most countries, school/class- and pupil-level response rates were above 70% (Roberts et al., 2009). Full details on the study and the participants can be found elsewhere (Currie et al., 2008a; Roberts et al., 2007, 2009). The present study included data from 98,773 11- and 13-year-olds from 34 countries. Due to lack of data on some covariates, Israel, Malta, Slovakia, and Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 134 Journal of Early Adolescence 32(1) the United States were excluded from the analyses. In addition, we excluded Greenland, Scotland, and Wales due to lack of information on HDI. We focused on 11- and 13-year-olds to capture the transition from childhood to adolescence, when youth are most likely to be susceptible to social stressors. Hence, analyses for the present study were based on 98,773 adolescents. Instruments Psychosomatic complaints. In the HBSC study, the HBSC symptom checklist (HBSC-SCL) was used to assess the occurrence of psychosomatic health complaints (Haugland et al., 2001). The HBSC-SCL is a reliable and valid instrument (Ravens-Sieberer et al., 2008) which measures eight symptoms (headache, stomach ache, back ache, feeling low, irritability or bad temper, feeling nervous, difficulties in falling asleep, and feeling dizzy) during the past 6 months. Answers were rated on a 5-point scale ranging from about every day to rarely or never. Although previous research has suggested a two-factor solution, the scale can also be thought to measure a unidimensional latent trait of psychosomatic complaints (Ravens-Sieberer et al., 2008). Multiple recurrent psychosomatic complaints were defined as at least two symptoms occurring more than once weekly (Cronbach’s α = .80). Physical activity and sedentary behaviors. Measures of physical activity and sedentary behavior were included in the analysis. “Moderate to vigorous” physical activity was assessed using the measure developed by Prochaska, Sallis, & Long (2001). The valid and reliable measure asks the question: “Over the past 7 days, on how many days were you physically active for a total of at least 60 minutes per day?” with answer options ranging from 0 days to 7 days. Information on sedentary behavior was assessed by asking how often respondents watched TV (including DVDs and videos), used the computer (for chatting online, Internet, emailing, homework, etc.), and played computer games on weekdays and on weekends. The answer options were “not at all,” “about half an hour a day,” “about 1 hour a day,” [. . .], “about 7 or more hours a day.” Although results from a validation study on the HBSC items are not available, a study by Schmitz et al. (2004) found high reliability and validity for similar type of items with similar age groups. For this analysis, an index was calculated by averaging the responses for all three areas (TV watching, computer use, and computer games) for weekdays and for weekend. This will be referred to as the Media Use Index (Cronbach’s α = .59). Familial context. The family context was assessed by two measures: communication with parents and family structure. The first asked “How easy is it for you to talk to the following persons about things that really bother you?” Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 135 Ottova et al. with option responses of “very easy,” “easy,” “difficult,” “very difficult,” or “don’t have or see this person.” Separate questions were used for mother and father. The item responses were dichotomized into “very easy/easy/don’t have or see this person” and “difficult/very difficult.” Family structure was assessed by asking adolescents to indicate who else usually lives with them at home, also including whether they had siblings living with them and, if yes, how many. In the analysis, we differentiated between families with “both parents,” “single parent,” “step family,” or “other.” The number of female and male siblings was combined for analysis. Both parental communication and family structure are measures which were developed within HBSC. Peer relations. Peer relations were assessed through two measures: number of close friends and experience of bullying. The first was assessed by “At present, how many close male and female friends do you have?” with response options of “none,” “one,” “two,” and “three or more.” Respondents answered the question for each gender separately. Answers were later combined and the average number of male and female friends calculated. Negative peer relations were measured by asking “How often have you been bullied at school in the past couple of months?” The answer options were “I have not been bullied at school in the past couple of months,” “it has only happened once or twice,” “2 or 3 times a month,” “about once a week,” or “several times a week.” The answer categories were dichotomized into “2 or 3 times a month/about once a week/several times a week” versus “it has only happened once or twice/I have not been bullied at school in the past couple of months.” The measure is based on an adapted version developed by Olweus (1996). School environment. School-related factors included class climate and potential stressors at school (academic achievement and workload), all of which have been developed within the HBSC study. Student relations were measured by three items and a validation study has shown that these three items function well as a subscale of a valid measurement model on support (Osen, Torsheim, & Wold, 2000; Torsheim, Wold, & Samdal, 2000). The items ask the participants to rate how much they agreed or disagreed with each of three statements about students in their classes. The statements were “students like being together,” “students are kind and helpful,” and “students accept me.” Answers were rated on a 5-point scale ranging from strongly agree to strongly disagree. The Class Climate Index used in the analyses was calculated as the mean of the three items (Cronbach’s α = .70). Academic achievement was assessed by the question “In your opinion, what does your class teacher(s) think about your school performance compared to your classmates?” The response categories were “very good,” “good,” “average,” or “below average.” Workload pressure was assessed by the question “How Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 136 Journal of Early Adolescence 32(1) pressured do you feel by the schoolwork you have to do?” The answer options were “not at all,” “a little,” “some,” or “a lot.” The School Pressure Index was calculated in the same manner as the Class Climate Index. Socioeconomic factors. The SES of the family was measured by the Family Affluence Scale (FAS) which was based on four items: “Does your family own a car, van, or truck?” (0 = no, 1 = yes, one, 2 = yes, two or more), “Do you have your own bedroom for yourself?” (0 = no, 1 = yes), “During the past 12 months, how many times did you travel away on holiday [vacation] with your family?” (0 = not at all, 1 = once, 2 = twice, 2 = more than twice), and “How many computers does your family own?” (0 = none, 1 = one, 2 = two, 2 = more than two). The scores of the answers were summed (range 0-7), and individuals were categorized into high (6-7), medium (4-5), and low (0-3) FAS groups (Currie et al., 2008b). The FAS has been validated and can be used as “an indicator of child material affluence” (Currie et al., 2008b, p. 1433). Country-level indicators. The HDI was developed by the United Nations Development Program (UNDP) and is a composite index formed by three components: longevity, education, and income. Despite criticism of the construct (Neumayer, 2001; Sagar & Najam, 1998), it has proven to be a valid index (Noorbakhsh, 1998). Information on the HDI was obtained from the UNDP website at http://hdrstats.undp.org/en/indicators/. Statistical Analyses Linear multilevel regression analyses were performed using HLM 5.05 software. Multilevel analyses account for the fact that responders within a certain context (e.g., country) may be more similar to each other than to individuals from a different context (i.e., intracontext correlation). As the variability of effects across different contexts was estimated, the role of contextual factors for this variability could be studied. To account for the hierarchical and clustered structure of the data, a hierarchical two-level model including separate variances at the individual level and at the country level (second level) was specified with random variation of the intercepts and slopes across countries. The reliability of the crosscountry variation was examined first, and an intraclass correlation coefficient greater than .10 indicates that 10% of the observed variation in the coefficients between countries represents a “true” difference (Cheung & Keeves, 1990). Such coefficients (intercepts and slopes) were specified as “random” and the coefficients and their distributions of variation across countries were estimated. The variance partitioning coefficient denotes the proportion of “reliable” variance in the outcome that is attributable to country differences. Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 137 Ottova et al. Consistent with Cohen’s recommendations, a proportion of .14 or greater was classified as a large effect (Cohen, 1988). Ravens-Sieberer et al. (2008) developed a unidimensional scoring algorithm based on seven of the eight items of the HBSC-SCL which enables valid cross-cultural comparisons and interval-scaled assessment of subjective health complaints. In this study, sociodemographic, socioeconomic, and familial-, school- and peer-related covariates were regressed on the psychosomatic sum score (see Appendix A for details on the formulae). The random variation of the intercept was regressed on HDI. The analyses were repeated for multiple recurrent health complaints using multilevel logistic regression analysis. Odds ratios (OR) were computed and are presented. Where possible, we tested the assumptions for hierarchical linear modelling empirically (linear relationship, distribution of residuals, equal variances, and covariances; Ditton, 1998). The other assumptions were considered from theoretical considerations of the model specifications. To the best of our knowledge, these assumptions were not violated. Results Table 1 presents descriptive results of the total sample for the dependent variable (psychosomatic complaints) as well as for some of the independent variables (gender, family structure, communication with parents, FAS, being bullied) including the HDI. The results for the remaining variables are presented in Appendix B. Girls comprised 52% of the total sample analyzed and there were slightly fewer 11-year-olds (48%) than 13-year-olds (52%). The mean age of the sample was 12.64 (SD = 1.05). The intercept and slopes were estimated as random effects across the countries. The intercept for the country-level indicator, age, and media use were regressed on the HDI. The variance partitioning coefficient of the dependent variable in the null model was .771. A mean psychosomatic complaint value of 4.09 was observed in our sample. Statistically significant differences were seen in the average number of psychosomatic complaints reported between different countries. The unconditional model with random intercept across country explained 4.33% of the overall variance. Cross-country variation in the intercept accounted for 6.14% of the overall variance in psychosomatic complaints. It was estimated that for 95% of the comparable countries, the mean number of psychosomatic complaints is within the range of 3.74 to 4.44. The full final model explained 23.67% of the overall variance. The prevalence of young adolescents reporting multiple recurrent psychosomatic complaints (two or more complaints more than once a week) varied between 17% (Austria) and 64% (Turkey). Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 138 Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 Austria Belgium Bulgaria Canada Croatia Czech Republic Denmark Estonia Finland France Germany Greece Hungary Iceland Ireland Italy Latvia Lithuania Luxembourg Country 4.40 4.15 4.12 4.00 4.12 3.90 4.21 4.12 4.00 3.91 4.17 4.08 3.93 3.99 4.24 3.80 4.00 4.10 3.97 3,073 2,539 2,645 3,811 3,658 1,900 1,910 6,091 2,251 2,206 2,339 3,209 1,790 M 2,524 4,268 2,524 2,896 2,933 2,745 Na 0.67 0.76 0.69 0.76 0.72 0.76 0.79 0.81 0.67 0.77 0.76 0.83 0.83 0.69 0.76 0.82 0.79 0.70 0.75 SD Psychosomatic complaints sum score Table 1. Sample Characteristics 22.7 31.1 24.5 36.3 21.5 37.3 32.8 31.1 21.4 44.5 34.1 31.6 29.7 16.7 27.8 34.7 29.7 29.3 34.1 % Multiple recurrent psychosomatic complaints 52.6 52.9 52.4 53.1 50.4 53.7 52.6 51.3 52.8 51.9 53.2 49.7 52.3 51.2 50.4 51.9 54.8 51.8 51.0 % Girls 18.1 17.3 14.8 14.2 14.9 9.7 14.6 14.5 12.3 8.8 22.6 17.6 13.6 14.2 13.7 12.0 18.3 7.6 14.6 % Single parent 14.6 10.0 11.0 21.6 12.5 10.6 9.1 11.1 13.2 15.5 15.0 15.3 16.6 9.9 19.7 9.5 16.4 10.8 18.0 % Not easy to talk to father 11.7 15.8 11.6 10.1 8.6 1.8 8.9 12.8 5.2 2.3 9.5 7.9 7.4 8.0 11.8 3.5 10.6 2.6 12.1 % Not easy to talk to mother 7.6 30.8 11.2 11.1 13.2 21.5 25.6 2.3 21.4 20.7 31.1 36.4 8.6 11.9 12.2 29.9 9.2 26.9 29.9 % Low FAS 8.9 26.6 9.2 14.9 14.7 24.8 8.7 5.7 8.7 9.4 23.5 29.5 15.5 16.9 13.7 15.1 17.1 8.8 6.0 % 0.955 0.883 0.959 0.961 0.947 0.942 0.879 0.969 0.965 0.951 0.866 0.870 0.960 0.955 0.953 0.840 0.966 0.871 0.903 HDI (continued) Being bullied 139 Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 4.29 4.23 4.07 3.98 3.59 3.85 4.25 4.09 4.08 2,993 4,674 2,105 2,475 2,501 2,418 3,016 7,997 98,773 0.68 0.77 0.72 0.72 0.83 0.77 0.73 0.75 0.77 0.65 0.69 0.79 0.63 0.86 0.85 SD 19.9 30.9 24.3 26.8 63.8 38.5 30.0 27.0 30.4 21.2 25.3 34.3 21.6 39.4 37.7 % Multiple recurrent psychosomatic complaints 51.9 52.9 51.5 51.9 49.9 55.1 51.9 53.7 52.2 51.7 50.8 52.6 52.7 52.9 53.1 % Girls 9.4 10.9 13.3 11.3 10.7 16.7 4.9 18.0 14.6 12.8 14.6 10.9 10.1 38.5 21.3 % Single parent 6.6 12.1 9.8 14.8 13.7 8.9 9.2 14.9 12.8 6.7 14.2 7.5 16.5 5.1 14.0 % Not easy to talk to father 4.2 3.7 11.7 7.8 1.0 7.3 1.3 11.5 8.0 6.5 9.3 2.9 5.8 1.4 11.0 % Not easy to talk to mother Note: FAS = Family Affluence Scale; HDI = Human Development Index. a. Because of a large number of missing variables, the total N does not match the total population of 11- and 13-year-olds in each country. 4.39 4.14 4.05 4.41 3.94 4.05 2,283 1,860 2,849 1,904 2,179 3,870 Netherlands Norway Poland Portugal Romania Russian Federation Slovenia Spain Sweden Switzerland Turkey Ukraine Macedonia UK Total M Na Psychosomatic complaints sum score Country Table 1. (continued) 10.2 13.9 5.7 8.8 70.6 55.4 38.4 12.5 21.1 7.5 3.0 31.5 24.3 41.3 48.7 % Low FAS 10.2 4.9 4.3 12.9 29.6 22.4 10.2 10.6 13.6 9.8 9.5 10.7 15.9 20.3 19.1 % Being bullied 0.929 0.955 0.963 0.960 0.806 0.796 0.817 0.947 0.964 0.971 0.880 0.909 0.837 0.817 HDI 140 Journal of Early Adolescence 32(1) Table 2 shows that a higher age, being a girl, not living with two original parents (i.e., living with a single parent, step parent, or other parent), lack of easy communication with one’s father or mother, low FAS, and high media use were each associated with more psychosomatic complaints. Regarding the school domain, a negative class climate, higher school pressure, and having been bullied two to three times or more in the past couple of months were associated with more psychosomatic complaints. Statistically significant interactions with gender were observed for the Close Friends Index, the Class Climate Index, the School Pressure Index, and the Media Use Index. Without consideration of interactions, girls have a fixed effect coefficient of -.129, t(33) = 4.41, p < .001. When interaction terms are entered into the model, the decreasing effects of poor close friends relationships (-.012 [t(33) = -2.23, p = .033]), a negative class climate (-.031 [t(33) = -5.34, p < .001]), high school pressure (-.087 [t(33) = -11.25, p < .001]), and a high media use (-.019 [t(33) = -4.99, p < .001]) on psychosomatic health were more pronounced for girls (indicated by negative interaction coefficients) which add to the decreasing effects of these predictors. The results further show an association between cross-country variation and HDI, wherein an increase of 0.1 HDI points was associated with an increase of 0.12 points on the Psychosomatic Complaints Index (indicating better health). Moreover, we tested if the individual-level predictors contribute to individual psychosomatic health in the same way for countries with different HDI. Within the multilevel regression model, it was tested if the cross-country variability in individual-level predictors could be explained by HDI. Results showed a significant covariation of individual-level coefficients with HDI only for age and media use. The decreasing effect of higher age (-.017 [t(32) = -4.80, p < .01]) was less pronounced in countries with high HDI (age on HDI: 0.131 [t(32) = 2.64, p < .05]). The decreasing effect of media use (-.037 [t(32) = -16.41, p < .01]) on the other hand was more pronounced in countries with high HDI (media use on HDI: -.163 [t(32) = -6.07, p < .001]). Table 3 shows the results of the multilevel logistic regression of the effect of the covariates shown in Table 2 on multiple recurrent psychosomatic complaints (at least two symptoms more than once a week). Being a girl, not living with two original parents (i.e., living with a single parent, step parent, or other parents), communication with father or mother not being easy, low FAS, and high media use were all associated with an increased risk (OR) of multiple recurrent health complaints. In the school context, negative class climate, school pressure, and having been bullied 2 to 3 times or more in the past couple of months were also associated with an increased risk of multiple recurrent health complaints. Frequent physical Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 141 Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 4.090917 1.213696 −0.017491 0.131420 −0.129116 −0.058893 −0.102807 −0.142575 −0.169454 −0.159238 −0.028069 0.017354 −0.310972 0.004984 −0.084543 −0.205613 0.005001 −0.036813 −0.163414 −0.011629 −0.031254 −0.087051 −0.019656 0.032476 0.286952 0.003643 0.049817 0.029253 0.005937 0.008890 0.018837 0.0006609 0.011389 0.009145 0.005612 0.011714 0.006436 0.008174 0.011488 0.001655 0.002244 0.026913 0.005222 0.005857 0.007738 0.003936 Standard error of fixed effect coefficient .000 .000 .000 .013 .000 .000 .000 .000 .000 .000 .005 .004 .000 .444 .000 .000 .005 .000 .000 .033 .000 .000 .000 p value for fixed effect coefficient 3.737 −0.053 −0.107 −0.100 −0.171 −0.299 −0.223 −0.266 −0.103 −0.030 −0.426 −0.056 −0.166 −0.329 −0.010 −0.057 −0.050 −0.073 −0.153 −0.056 <.001 <.001 >.500 >.500 .331 .143 .013 <.001 .003 .413 <.001 <.001 <.001 <.001 <.001 .028 >.500 .401 .103 .001 0.061 0.001 0.273 0.001 0.002 0.012 0.001 0.006 0.003 0.001 0.007 0.002 0.003 0.007 0.000 0.000 0.001 0.001 0.002 0.001 VPC 95% CI lower-bound country variation p cross-country variation 4.445 0.018 0.365 −0.018 −0.035 0.014 −0.115 −0.052 0.047 0.065 −0.196 0.066 −0.003 −0.083 0.020 −0.170 0.027 0.010 −0.021 0.017 95% CI upper-bound country variation Note: VPC = variance partitioning coefficient; CI = confidence interval; HDI = Human Development Index; FAS = Family Affluence Scale. The reference group was defined as being male, with a mean age of 12.64 years, living with two original parents, reporting easy communication with father/mother, with high FAS, not having been bullied more than 1 to 2 times in the past couple of months, and with a mean value in the Close Friend Index, Class Climate Index, School Pressure Index, Media Use Weekend Index, and Physical Activity. Intercept Intercept on HDI Age Age on HDI Girl Single parent Stepparent Other parent Not easy to talk to father Not easy to talk to mother Low FAS Medium FAS Being bullied Close Friend Index Class Climate Index School Pressure Index Physical activity (days) Media Use Index Media Use Index on HDI Girls × Close Friend Index Girls × Class Climate Index Girls × School Pressure Index Girls × Media Use Index Fixed effect coefficient Table 2. Multilevel Linear Regression of Familial, Peer-, and School-Related Social Determinants and Individual- and Country-Level Socioeconomic Status on Psychosomatic Complaints Mean Item Score 142 Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 0.288 0.015 0.980 0.691 1.140 1.220 1.365 1.471 1.625 1.426 1.248 1.013 2.078 1.010 1.235 1.793 0.981 1.125 1.980 1.022 1.053 1.116 1.018 Intercept Intercept on HDI Age Age on HDI Girl Single parent Stepparent Other parent Not easy to talk to father Not easy to talk to mother Low FAS Medium FAS Being bullied Close Friend Index Class climate Index School Pressure Index Physical activity (days) Media Use Index Media Use Index on HDI Girls × Close Friend Index Girls × Class Climate Index Girls × School Pressure Index Girls × Media Use Index 0.240 0.002 0.956 0.505 0.907 1.183 1.293 1.314 1.563 1.343 1.178 0.969 1.951 0.972 1.183 1.664 0.971 1.109 1.691 0.977 1.015 1.060 0.999 95% CI lower-bound 0.346 0.101 1.004 0.944 1.432 1.258 1.440 1.645 1.691 1.513 1.321 1.059 2.213 1.049 1.289 1.932 0.991 1.140 2.318 1.070 1.092 1.175 1.037 95% CI upper-bound <.001 <.001 .095 .022 .253 <.001 <.001 <.001 <.001 <.001 <.001 .562 <.001 .609 <.001 <.001 <.001 <.001 <.001 .331 .008 <.001 .066 p value 1.090 2.752 1.327 1.672 2.076 1.903 1.663 1.568 1.198 2.784 1.163 1.504 2.633 1.018 1.186 1.182 1.223 1.361 1.089 0.472 1.121 1.114 1.042 1.389 1.222 0.993 0.857 1.551 0.877 1.014 1.221 0.945 1.066 0.884 0.906 0.915 0.952 0.715 95% CI upper-bound 0.881 0.116 95% CI lower-bound Country variation <.001 <.001 .253 >.500 >.500 .398 .015 .003 .072 .052 .001 .042 .002 0 .074 .197 .176 >.500 .217 .387 p value Note: CI = confidence interval; HDI = Human Development Index; FAS = Family Affluence Scale. The reference group was defined as being male, with a mean age of 12.64 years, living with two original parents, reporting easy communication with father/mother, with high FAS, not having been bullied more than 1 to 2 times in the past couple of months, and with a mean value in the Close Friend Index, Class Climate Index, School Pressure Index, Media Use Weekend Index, and physical activity. OR Fixed effects Table 3. Multilevel Logistic Regression of Multiple Recurrent Psychosomatic Complaints on Familial, Peer-, and School-Related Social Determinants and Individual- and Country-Level Socioeconomic Status 143 Ottova et al. activity was associated with a lower risk for multiple recurrent health complaints (OR = 0.98, p < .001). The risk for multiple recurrent health complaints associated with a poor Close Friends Index (OR = 1.02, p = .331), negative class climate (OR = 1.05, p < .01), high school pressure (OR = 1.12, p < .001), and high media use (OR = 1.02, p = .066) was more pronounced for girls as indicated by the additional OR for the interaction terms. A statistically significant cross-national variability was observed in the percentage of young adolescents suffering from multiple recurrent health complaints. This cross-national variability was associated with the HDI, and a higher HDI was associated with a lower risk for multiple recurrent health complaints. Finally, we also tested if the inclusion of the control variables (physical activity and Media Use Index) affected the estimation of the other coefficients, but we only found marginal differences. Discussion The purpose of this study was to investigate the relationship between both individual-level (family, peers, school) and country-level factors with psychosomatic complaints in a large international sample of young adolescents. We found that not living with both original parents, having difficulty talking with either parent, being bullied 2 to 3 times or more in the past couple of months, and experiencing high academic pressure at school was associated with poorer psychosomatic health and a higher chance for multiple recurrent psychosomatic complaints. The next section will begin by addressing the hypotheses formulated in the introduction and connecting these to the results found in this study. Following a discussion of the main findings in light of past research in this field, strengths and limitations of this study will be pointed out. The discussion concludes with implications for policy and practice. As hypothesized, a stable family structure, good communication with one’s parents, good peer relationships, absence of negative social interactions (bullying), and a positive school environment (good class climate, low schoolwork pressure) were all associated with better psychosomatic health. At the country level, a positive relationship between HDI and young people’s psychosomatic health emerged as well as significant covariation between the HDI and age, and between HDI and media use. Specifically, decreasing effects of higher age were less pronounced in countries with high HDI, while, for media use, the opposite was true. Our results Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 144 Journal of Early Adolescence 32(1) confirmed the fourth hypothesis showing that countries with a high HDI score had generally lower rates of psychosomatic complaints. By testing a multidimensional country-level indicator—HDI—in a multinational data set, our study makes an important contribution to research on young adolescents’ psychosomatic health. From the stress perspective, psychosomatic complaints are heightened by experiences that induce stress and are possibly relieved by protective factors. In general, our results showed that most of the variance in psychosomatic complaints was due to individual-level stressors found in all investigated domains (family, peers, school) as well as the larger socioeconomic context. These findings are consistent with other studies that also stressed the importance of family structure and child-parental relationships during adolescence (Brolin Laftman & Östberg, 2006; Due, Lynch, Holstein, & Modvig, 2003). Surprisingly, positive social relations did not have a significant effect in this study, although previous research has shown that the quality of friendships and supportive relationships are important for adolescent well-being (Rubin et al., 2004). Negative peer relationships however did have an impact: adolescents who were frequently bullied were more likely to report multiple recurrent psychosomatic complaints than those who were not bullied. This negative effect of bullying on individual well-being is consistent with other studies on this subject (Alfven, Őstberg, & Hjern, 2008; Ghandour et al., 2004; Richter et al., 2007). Consistent with previous studies, negative class climate and school pressure were both significantly associated with psychosomatic complaints (Torsheim & Wold, 2001). Too much pressure from schoolwork can have a negative effect, especially if there is too little free time to relax and participate in activities that benefit well-being (Gaspar, 2010). Consistent with previous research, being a girl was associated with a higher risk for psychosomatic complaints (Cavallo et al., 2006). Different socialization strategies, as well as higher attentiveness to their body (Verbruggev, 1982), may explain some of the gender differences in complaint or symptom reporting. In fact, in many cultures, the expression of physical and emotional states is more acceptable for girls than for boys (Gijbers van Wijk, van Vilet, Kolk, & Everaerd, 1991). In this study, age did not have significant effects, but this could be due to the narrow age span under investigation (11- and 13-year-olds only). After controlling for individual-level factors, an effect of national characteristics (HDI) still remained. This demonstrates that individual psychosomatic complaints are also predicted by the social state of one’s country. People living in less privileged countries report more psychosomatic Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 145 Ottova et al. complaints even after controlling for other stressors. Previous research on this subject has shown the effect of certain country-level indicators, such as the Gini and GDP (Holstein et al., 2009; Olsen & Dahl, 2007; Torsheim et al., 2006). In this study, we looked at the effect of the HDI to see whether it would explain more of the variance in the cross-national differences in psychosomatic complaints. Indeed, an effect of HDI was identified, and our results further show that the decreasing effect of higher age on psychosomatic complaints was lower in countries with a high HDI, whereas high media use had a greater decreasing effect on psychosomatic complaints in countries with a high HDI. Thus, as adolescents get older, they tend to experience more psychosomatic complaints, but this effect is most pronounced in countries with low HDI. We may only speculate why this is the case. Perhaps, the effect of living in a low-HDI country is felt most by older adolescents as they tend to be more aware of the social and socioeconomic context in which they live. With regard to media use, the effect we found may be due to another third variable which is related to HDI and psychosomatic complaints. The prevalence of psychosomatic complaints varied greatly between countries, whereby it was lowest in Austria (17%) and highest in Turkey (64%). The reason for these differences is not clear but it can be assumed that cultural issues play a part—an aspect that could be clarified by further qualitative research. Although psychosomatic complaints occur in all cultures, not all cultures may be accepting of psychological symptoms and mental illness (Araya, Rojas, Fritsch, Acuna, & Lewis, 2001). Cultural factors may influence the way a somatic complaint is described, expressed, and categorized. The key difference is the nature of the social adversities and the types of illness models that might predispose individuals to or precipitate these complaints (Patel & Sumathipala, 2006). The HBSC-SCL is sensitive to cross-cultural comparisons, and previous analyses have identified cross-cultural variations in psychosomatic complaints among 35 countries (Ravens-Sieberer et al., 2008). Strengths and Limitations This study has several strengths that deserve attention. First, we used data from a large international survey (HBSC) that is carried out every 4 years and provides valuable information on health status and health behavior in a large sample of children. Second, obtaining data from children themselves through self report is advantageous when exploring subjective constructs Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 146 Journal of Early Adolescence 32(1) such as well-being. Third, country-level indicators such as HDI have been rarely used in cross-sectional analyses and can be useful in further explaining cross-country patterns. We consider the use of the HDI a strength of this study as it introduces an innovative aspect in research on child health. Even though it has been criticized (McGillivray, 1991), it adds a different perspective in the interpretation of country differences as it measures human development along three dimensions (knowledge, healthy life, standard of living; Sagar & Najam, 1998). In this way, it broadens the discussion and contributes to research. At the same time, there are also some limitations that need to be stressed. The use of single-item scales for capturing various health behaviors (e.g., physical activity, sedentary behavior), as well as for the other contexts (family, school, peers), posed some challenges. Generally, multiple item measures are preferred as they are more reliable and this is important in statistical analyses when errors of variance need to be minimized (Loo, 2002). However, most of the single-item measures have long-standing use in HBSC and many have been subjected to validation studies (Prochaska et al., 2001). The crosssectional nature of HBSC prohibits any conclusions about causal relationships. Last, we did not control for chronic diseases or for emotional disturbances (such as anxiety, depressive mood). Although most of the complaints during adolescence have no organic cause (Taylor, Szatmari, Boyle, & Offord, 1996), lack of information on chronic diseases and emotional disturbances, both of which have somatic and emotional correlates, may be considered a weakness. Chronic disease may be a stressor in itself (Compas & Boyer, 2001) and thus could have an indirect effect on complaints. Implications of the Findings and Future Directions Given the fact that psychosomatic complaints are higher in girls and are associated with the HDI of a country, one implication of this study is that gender-specific health promotion programs should be adapted to the cultural context within each country. The availability and use of media should be taken into greater consideration in programs targeting health behavior modifications as media use emerged as an important factor associated with health complaints—particularly in girls—and moreover had a more negative effect in countries with high HDI. Thus, programs in countries with higher HDI should take media use into greater account. Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 147 Ottova et al. Appendix A Level 1 Model Psychosomatic complaint sij = β0 j + β1 j age + β2 j girl + β3 j singleparent + β 4 j stepparent + β5 j otherparent + β6 j talkfather + β7 j talkmother + β8 j lowFAS + β9 j medFAS + β10 j bullied + β11 j closefriend + β12 j classclimate + β13 j schoolpressure + β14 j physicalactivity + β15 j mediause + β16 j Girl × Closefriend + β17 j Girl × Classclimate + β18 j Girl × Schoolpressure + β19 j Girl × Mediause + eij Level 2 Model β0 j = γ 00 + γ 01 HDI + γ 0 j β1 j = γ10 + γ11 HDI + γ1 j β15 j = γ150 + γ151 HDI + γ15 j For the model with continuous outcome, the link function is identical. For the model with dichotomous outcome, the link function is as follows: pij ηij = log 1 - pij where pij is the probability of recurrent psychosomatic health complaints. For the model with dichotomous outcome, ηij replaces Psychosomaticcomplaintsij in the Level 1 formula. Appendix B Authors’ Notes The members of the Positive Health Focus Group are as follows: Ulrike RavensSieberer (DE; coordinator), Torbjørn Torsheim (NO), Bogdana Alexandrova (BG), Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 148 Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 N 2,524 4,268 2,524 2,896 2,933 2,745 3,073 2,539 2,645 3,811 3,658 1,900 1,910 6,091 2,251 2,206 2,339 3,209 1,790 Country Austria Belgium Bulgaria Canada Croatia Czech Republic Denmark Estonia Finland France Germany Greece Hungary Iceland Ireland Italy Latvia Lithuania Luxembourg a Sample Characteristics 1.2 1.3 1.8 3.1 0.9 2.0 3.1 1.6 1.0 1.3 1.0 1.0 1.6 1.9 1.3 1.7 2.6 2.1 1.6 % Stepparent 43.7 41.5 52.3 37.9 48.9 46.8 39.8 43.6 44.2 37.8 39.0 48.3 47.5 25.4 57.4 45.4 46.9 47.1 31.8 % Other parent 25.1 35.6 25 31.1 24.9 34.7 30.1 22.9 26.1 40.4 28.6 31.4 20.6 21.6 25.9 35.4 28.6 30.8 34.4 % FAS med 3.18 3.50 3.42 3.54 3.65 3.60 3.45 3.28 3.08 3.45 3.16 2.94 3.60 3.44 3.57 3.40 3.36 3.47 3.30 M 0.74 0.71 0.76 0.70 0.65 0.66 0.73 0.79 0.79 0.74 0.74 0.79 0.63 0.73 0.69 0.80 0.80 0.77 0.78 SD Close Friend Index 1.91 1.93 2.54 2.30 2.03 2.36 1.87 2.14 2.16 2.23 1.82 2.20 2.18 1.97 2.01 1.94 2.46 2.33 1.86 M 0.69 0.78 0.90 0.76 0.70 0.78 0.73 0.85 0.74 0.80 0.67 0.77 0.78 0.75 0.71 0.76 0.89 0.89 0.73 SD Class Climate Index 4.52 4.07 4.22 4.76 4.65 4.18 4.62 4.11 4.96 3.90 4.19 4.08 4.19 4.50 5.21 3.91 4.37 4.06 3.88 M 1.90 2.09 2.36 1.91 1.93 2.12 1.95 2.02 1.89 1.94 1.93 2.05 2.04 1.98 1.81 2.04 1.99 2.08 1.94 SD Physical activity 4.22 4.19 4.70 4.20 3.82 3.73 3.88 4.55 3.77 3.91 3.98 3.89 4.39 3.84 3.19 3.24 4.15 3.70 4.03 M 1.77 1.67 1.89 1.65 1.54 1.50 1.43 1.60 1.37 1.55 1.62 1.48 1.74 1.39 1.27 1.32 1.59 1.44 1.62 SD Media Use Index 0.57 0.64 0.67 0.66 0.61 0.63 0.65 0.59 0.59 0.65 0.55 0.62 0.61 0.69 0.68 0.64 0.59 0.61 0.64 SD (continued) 2.03 2.14 2.04 2.16 1.82 2.31 2.10 2.26 2.24 2.20 2.24 1.92 2.20 2.19 2.00 2.37 2.28 2.35 2.14 M School Pressure Index Fiona Brooks (GB), Antony Morgan (GB), Cath Fenton (GB), Kädi Lepp (EE), Raili Välimäa (FI), Céline Vignes (FR), Mariane 149 Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 2,283 1,860 2,849 1,904 2,179 3,870 2,993 4,674 2,105 2,475 2,501 2,418 3,016 7,997 98,773 N 0.3 1.8 1.5 1.4 2.4 1.4 1.3 1.2 0.2 0.5 2.5 1.9 1.4 1.4 1.6 % Stepparent 38.9 28.0 43.6 44.1 43.6 39.7 43.8 46.1 38.2 41.5 24.2 37.7 44.6 37.0 40.9 % Other parent 16.4 27.3 19.4 32.7 19.5 26.3 15.8 27.1 20.4 31.9 37.2 21.5 19.0 30.0 27.3 % FAS med 3.38 3.53 3.12 3.61 3.43 3.30 3.33 3.60 3.44 3.27 3.37 3.47 3.42 3.60 3.42 M 0.74 0.69 0.92 0.66 0.77 0.81 0.83 0.67 0.72 0.78 0.81 0.71 0.79 0.65 0.76 SD Close Friend Index 1.87 1.78 2.23 1.80 2.03 2.36 1.97 1.88 1.87 1.87 2.23 2.32 1.80 2.03 2.07 M 0.65 0.68 0.76 0.66 0.69 0.85 0.69 0.72 0.67 0.64 0.78 0.81 0.67 0.79 0.78 SD Class Climate Index 4.54 4.33 4.18 3.66 3.73 3.42 4.15 4.11 4.37 3.81 3.96 4.32 4.37 4.54 4.25 M 1.94 1.91 2.01 2.01 2.17 2.13 1.98 2.16 1.92 1.95 2.26 2.07 2.05 1.86 2.04 SD Physical activity 4.28 3.83 4.57 4.45 4.42 4.02 3.90 3.65 3.79 3.43 3.62 3.86 4.39 4.07 3.98 M 1.57 1.37 1.75 1.75 1.86 1.58 1.47 1.44 1.42 1.44 1.71 1.46 1.81 1.60 1.60 SD Media Use Index Note: FAS = Family Affluence Scale a. Because of a large number of missing variables, the total N does not match the total population of 11- and 13-year-olds in each country. Netherlands Norway Poland Portugal Romania Russian Federation Slovenia Spain Sweden Switzerland Turkey Ukraine Macedonia United Kingdom Total Country a Appendix B (continued) 2.04 2.10 2.26 2.34 3.43 3.31 3.33 3.61 3.44 3.27 3.37 3.47 3.42 3.60 3.42 M 0.55 0.62 0.61 0.64 0.58 0.63 0.59 0.67 0.59 0.61 0.71 0.61 0.61 0.65 0.64 SD School Pressure Index 150 Journal of Early Adolescence 32(1) Sentenac (FR), Veronika Ottova (DE), Christina Schnohr (GL), Gyöngyi Kökönyei (HU), Kjartan Unak (IS), Franco Cavallo (IT), Inese Gobina (LV), Wilma Vollebergh (NL), Saskia van Dorsselaer (NL), Jørn Hetland (NO), Joanna Mazur (PL), Tania Gaspar (PT), Viorel Mih (RO), Aurora Szentagotai (RO), Eva Kallay (RO), Andrea Geckova (SK), Zuzana Katreniakova (SK), Helena Jericek (SI), Eva Stergar (SI), Vesna Pucelj (SI), Pilar Ramos (ES), Mia Danielson (SE), Lilly Eriksson (SE), Mujgan Alikasifoglu (TR), Ethem Erginoz (TR). Declaration of Conflicting Interests The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. Funding The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: Regarding the research, the authors are grateful for the financial support offered towards the data collection by the national government ministries, research foundations and other funding bodies in the participating countries. References Alfven, G., Őstberg, V., & Hjern, A. (2008). Stressors, perceived stress and recurrent pain in Swedish schoolchildren. Journal of Psychosomatic Research, 65, 381-387. Araya, R., Rojas, G., Fritsch, R., Acuna, J., & Lewis, G. (2001). Common mental disorders in Santiago, Chile: Prevalence and socio-demographic correlates. British Journal of Psychiatry, 178, 228-233. Bakoula, C., Kapi, A., Veltsista, A., Kavadias, G., & Kolaitis, G. (2006). 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Risk and protective factors for children’s and adolescents’ mental health: Results of the BELLA study. European Journal of Child and Adolescent Psychiatry, 17(Suppl. 1), 133-147. Bios Veronika Ottova is a research assistant and doctoral student at the University Medical Center Hamburg-Eppendorf in Hamburg, Germany. Her research interests include psychosocial health, well-being, and health-related quality of life in children and adolescents. Michael Erhart has a background in psychology and a PhD in public health. His research areas include health-related quality of life, chronic diseases, and international studies on child and adolescent health. His area of expertise is statistical modelling, psychometry, and epidemiology. Wilma Vollebergh is a professor of social and behavioral sciences at the University of Utrecht, Utrecht, Netherlands and head of the research program Youth in Changing Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 157 Ottova et al. Cultural Contexts, an interdisciplinary research program that focuses on trajectories of mental health, risk behaviors, and cultural lifestyles of adolescents and young adults. Gyöngyi Kökönyei received her PhD in health psychology at Eotvos Lorand University in Budapest, Hungary. She is an assistant professor in the personality and health psychology department at Eotvos Lorand University. She is also a researcher at the National Institute of Child Health in Budapest. Her research interests include somatization, emotion regulation, chronic pain, and adolescents’ well-being and deviant behavior. Antony Morgan is an epidemiologist and fellow of the UK Faculty of Public Health. He currently works as an associate director at the National Institute of Health and Clinical Excellence and is the chair of the HBSC Policy Development Group. Inese Gobina is a public health specialist and a lecturer at the Department of Public Health and Epidemiology at Riga Stradins University, Riga, Latvia. Her research interests include subjective health issues and medicine use among adolescents. Helena Jericek received her PhD in social pedagogy at Faculty of Education at University in Ljubljana. She is currently a researcher at the Centre for Health Promotion at the National Institute of Public Health, Ljubljana, Slovenia, where she is involved into development of different promotional and preventional programs. Her research interests include mental health promotion, health and health behavior of children and young people. Franco Cavallo graduated in medicine in Torino, where he also received his specialty degree in child psychiatry and in hygiene and preventive medicine. He is currently a full professor in clinical epidemiology with the Faculty of Medicine at the University of Torino, Turin, Italy. His research interests are prevention and health promotion in childhood. He is currently active in the domain of adolescent behavior, growth, and development. Raili Välimaa is a senior lecturer in the health sciences at the University of Jyväskylä, Jyväskylä, Finland and an adjunct professor in health promotion at the University of Eastern Finland. She holds a PhD in health education. Her research interests include self-rated health and health behavior, health as a concept, health promotion practices in families, and health promotion in schools, including research on school health education and health education teacher training. Margarida Gaspar de Matos is a health and clinical psychologist with a PhD in special education and rehabilitation (1993) and a professor in international health Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012 158 Journal of Early Adolescence 32(1) (2004). She is the principal investigator for HBSC in Portugal and coordinates international EU research there (7th Framework). She has an academic position at the FMH/Technical University of Lisbon and a research position at the CMDT/Institute of Hygiene and Tropical Medicine/New University of Lisbon. Her area of expertise is youth mental health and healthy lifestyles. She works in close connection with the Portuguese government in the area of health and education and also supervises the Psychological Mental Health Center/Technical University of Lisbon. Tania Gaspar is a health and clinical psychologist with a master’s degree in public health and a PhD in psychology. She is the Portuguese executive coordinator of the European TEMPEST project (7th Framework) and a member of HBSC and KIDSCREEN in Portugal. She is the director of the Psychology and Education Sciences Institute/Lisbon Lusíada University, where she coordinates and supervises the Psychological Mental Health and Health Promotion Center. She also has a research position at the CMDT/Institute of Hygiene and Tropical Medicine/New University of Lisbon and at the FMH/Technical University of Lisbon. Her areas of expertise are youth mental health, healthy lifestyles, health-related quality of life, and socioeconomic and migration status. Christina W. Schnohr is consultant at Ministry of Social Affairs (Greenland) and associated researcher at Department of Public Health, University of Copenhagen, Copenhagen, Denmark. PhD project concerned socioeconomic inequalities in adolescent health smoking behaviors and how policy may affect this behavior. General research interests are methodological and measurement issues, in particular, use of scales and scale validation. Ulrike Ravens-Sieberer is a professor of public health, health psychology, and health care services research for children and adolescents at the University Medical Center Hamburg-Eppendorf. She is the deputy director of the Department of Psychosomatics of Children and Adolescents and head of the research group “Child Public Health.” She coordinates and conducts national and European health surveys on mental health, health-related quality of life, and health behavior in children and adolescents. Her focuses lie in prevention and health promotion, social determinants of children’s mental health, and the development and evaluation of supportive programs for mental health promotion. Downloaded from jea.sagepub.com at NUI, Galway on June 12, 2012