Journal of Professional Nursing 42 (2022) 290–300 Contents lists available at ScienceDirect Journal of Professional Nursing journal homepage: www.elsevier.com/locate/jpnu Positive and negative psychosocial factors related to healthy and unhealthy weight control among nursing students Jennifer L. Barinas, M.A. a, *, Ryon C. McDermott, Ph.D. b, Susan G. Williams, Ph.D., RN c, Sharon M. Fruh, Ph.D., RN, FNP-BC, FAANP c, Caitlyn Hauff, Ph.D. d, Geoffrey M. Hudson, Ph.D., CSCS d, Rebecca J. Graves, Ph.D., NP-C c, Bernadette Mazurek Melnyk, Ph.D., APRN-CNP, FAANP, FNAP, FAAN e a Department of Psychology, University Commons 1000, University of South Alabama, Mobile, AL 36608, United States of America Department of Counseling and Instructional Sciences, University Commons 3800, University of South Alabama, Mobile, AL 36688, United States of America c College of Nursing, 5721 USA Drive North, University of South Alabama, Mobile, AL 36688, United States of America d Department of Health, Kinesiology, and Sport, Suite 1016, University of South Alabama, Mobile, AL 36688, United States of America e College of Nursing, 1585 Neil Avenue, The Ohio State University, Columbus, OH 43210, United States of America b A R T I C L E I N F O A B S T R A C T Keywords: Nursing student health Weight management Anxiety Self-efficacy Background: Although nursing students are educated on the importance of exercising regularly and maintaining a well-balanced diet, many do not practice healthy weight management behaviors, and some even use unhealthy weight loss methods. Yet, little research has examined both positive and negative psychosocial variables related to weight control among nursing students. Purpose: The present study aimed to identify the most salient psychosocial variables related to healthy and unhealthy weight control among nursing students. Method: Using survey data from 241 nursing students, structural equation modeling was conducted to examine the relative contributions of eight interrelated psychosocial variables, including constructs from a strengths perspective (health-specific hope, health self-efficacy, social support, and body satisfaction) and from a deficit perspective (depression, anxiety, weight perception, and barriers to physical activity). Results: Results showed that the degree to which individuals perceive themselves to be overweight was related to both healthy and unhealthy weight control. Aside from weight perception, health self-efficacy produced the strongest association with healthy weight control, and anxiety produced the strongest association with unhealthy weight control. The structural model explained 23 % of the variance in healthy weight control and 29 % of the variance in unhealthy weight control. Conclusions: These findings emphasize the need for tailored, integrated weight management interventions for nursing students that equip them with effective anxiety management skills and build self-efficacy. Nursing students face distinct challenges in managing their health and well-being (Bartlett et al., 2016; Fronteira & Ferrinho, 2011; Graves et al., 2020; McDermott et al., 2020; Mills et al., 2020; Pulido-Martos et al., 2012; Tung et al., 2018; Younas, 2017). Maintaining a healthy weight is especially difficult in a fast-paced and stressful learning environment with little time for self-care (Lehmann et al., 2014; Phiri et al., 2014; Stanton et al., 2021). Indeed, up to 45 % to 65 % of nursing students have a body mass index (BMI) that is classified as overweight or obese (Gormley & Melby, 2020; Miller et al., 2008; Williams et al., 2018; Zapka et al., 2009). The negative health effects associated with obesity (such as increased risk for cardiovascular disease, type II diabetes, mental health issues, orthopedic conditions, and cancer) are widely known (Bray, 2004; Cheng et al., 2016; Pi-Sunyer, 2002; Rajan & Menon, 2017). Thus, understanding weight control behaviors in nursing students may provide critical information to inform health promotion efforts in this population. A central goal of health promotion is to increase healthy behaviors while simultaneously decreasing unhealthy behaviors. Unfortunately, many nursing students do not practice healthy weight management behaviors, such as engaging in routine physical activity and eating meals * Corresponding author at: Department of Psychology, University Commons 1000, University of South Alabama, Mobile, AL 36608, United States of America. E-mail address: jlb1922@jagmail.southalabama.edu (J.L. Barinas). https://doi.org/10.1016/j.profnurs.2022.07.017 Received 17 November 2021; Received in revised form 21 July 2022; Accepted 25 July 2022 Available online 10 August 2022 8755-7223/© 2022 Published by Elsevier Inc. J.L. Barinas et al. Journal of Professional Nursing 42 (2022) 290–300 meeting the recommended nutritional content (Blake et al., 2011; Graves et al., 2020; Ross et al., 2017). Furthermore, nursing students may use unhealthy methods of losing weight such as restricting portions, skipping meals, and using diet pills (Levinson et al., 2020; Stanton et al., 2021). These unhealthy weight control behaviors can often be pre­ cursors to eating disorders, such as anorexia or bulimia (Graham et al., 2020; Hazzard et al., 2021; Jebeile et al., 2021). To provide a nuanced perspective of nursing students' healthy and unhealthy weight control behaviors, the present study drew upon a variety of psychological (e.g., mental health and well-being; Emmer et al., 2020; Mata & Hertwig, 2018), behavioral (e.g., diet and exercise; Johns et al., 2014), and social factors (e.g., social support and accountability; McGill et al., 2020; Wadden et al., 2020). Additionally, the present investigation recognizes that such factors (referred to as psychosocial variables from this point forward) can be either positive (psychosocial strengths) or negative (risk factors). While addressing nursing students' psychosocial deficits provides potentially important information about which factors need to be reduced, such a deficit perspective does not yield information about what should be enhanced. By contrast, a positive or strengths-based perspective provides infor­ mation about which variables could be harnessed or enhanced to help nursing students thrive. Accordingly, the aim of the present study was to examine how a variety of positive and negative psychosocial variables were related to healthy and unhealthy weight control behaviors among nursing students. comprehensive reviews). For instance, in a particularly large sample of college students (N = 2265), researchers found that greater levels of global hope were positively associated with more frequent exercising and attempts to limit fat intake (Berg et al., 2011). To date, researchers have yet to examine health-specific hope (i.e., agency and pathways thinking for health goals) in relation to healthy and unhealthy weight control. Nevertheless, the rich body of research linking global hope to health behaviors suggests that health-specific hope should be positively associated with healthy weight management behaviors. Health self-efficacy Self-efficacy is a strengths-based construct from social cognitive theory that has been identified to be a strong predictor of health behavior, including weight control behavior (Foreyt & Goodrick, 1994). Health self-efficacy refers to the belief in one's capacity to engage in behaviors or implement changes to improve one's health (Bandura, 1977; Lee et al., 2008). Prior research has shown the health-promoting effects of increased health self-efficacy. For example, one study involving young adults found that enhancing self-efficacy was associ­ ated with improved eating habits and greater weight loss (Roach et al., 2003). For these reasons, nursing students with greater health selfefficacy may be especially well-equipped to manage their weight using healthy methods, in part due to an increased likelihood to: (a) initiate healthy behavior change, and (2) persist despite challenges or setbacks (Schwarzer & Warner, 2013). Psychosocial factors There is a dearth of literature pertaining to psychosocial factors and weight control behaviors among nursing students in the United States (U.S.). Indeed, weight control behaviors have been more widely studied in other populations (i.e., general college student or adolescent samples, individuals diagnosed with eating disorders; Allan & Goss, 2014; Ken­ nedy et al., 2019; Lyzwinski et al., 2018; Nagata et al., 2018). A smaller number of studies have focused on weight control behaviors among nursing students (Blake, Stanulewicz, & Griffiths, 2017; Chan, 2014; Ham & Lim, 2017; Jeong, 2020; Lee & Kim, 2020), with the majority conducted outside of the U.S. (e.g., South Korea, China, and the United Kingdom). Due to contextual differences in diet, rates of overall obesity, and training, the findings from these studies may not generalize to nursing students in the U.S. Additionally, most of these studies have focused on behavioral aspects rather than psychological or social con­ tributors and few have examined the relative contributions of both health promoting factors and health risk factors in one model of weight management behavior. Given the paucity of research on specific psychosocial factors of U.S. nursing students in the extant literature, the present study advanced several variables that, in theory, may be especially relevant to weight control behaviors in this population from a strengths perspective: (a) health-specific hope, (b) health self-efficacy, (c) social support, and (d) body satisfaction. Additionally, we proposed a variety of psychosocial variables from a deficit perspective: (a) depression, (b) anxiety, (c) weight perception, and (d) barriers to physical activity. In the following sections, research supporting the links between each of these variables and nursing students’ healthy and unhealthy weight management be­ haviors are briefly reviewed. Social support The majority of prior research has found social support to be posi­ tively related to healthy weight management (Lemstra et al., 2016; Verheijden et al., 2005). As such, social support has often been used to enhance weight management interventions, most commonly involving family or support groups (Verheijden et al., 2005). Social support can benefit healthy weight control in a variety of ways: accountability; emotional support (encouragement, positive reinforcement); informa­ tion and problem-solving (advice, strategies); instrumental support (help with cooking healthy meals); and contextual changes (stocking the home with healthier food options) (Reading et al., 2019; Verheijden et al., 2005). The relationship between social support and healthy nutrition and physical activity has also been observed in nursing student samples (Blake, Stanulewicz, & Griffiths, 2017; Suherman et al., 2018). However, no studies to our knowledge have examined the relative contribution of social support in the context of other relevant variables such as self-efficacy or hope. Depression Depression is prevalent among nursing students, with a recent metaanalysis of 27 studies finding a pooled depression prevalence of 34.0 % among U.S. and international nursing students (Tung et al., 2018). Depression can often serve as a barrier to healthy weight control and lead to unhealthy weight-related practices. Many of the hallmark symptoms of depression, including feelings of sadness, hopelessness, low energy, lack of interest in activities, and appetite changes (American Psychiatric Association, 2013), can make engaging in healthy weight control even more challenging (Glowacki et al., 2017). Thus, depressed nursing students may be especially likely to avoid healthy weight con­ trol behaviors that involve being active (e.g., exercising or preparing healthy meals). Further, nursing students who are depressed may also be more likely to engage unhealthy strategies to manage their weight. Supporting this later possibility, disordered eating is a common feature among depressed college women (Allgöwer et al., 2001; Gitimu et al., 2016; Harring et al., 2010). Health-specific hope Snyder (1994, 2000) defined global hope as two interrelated di­ mensions of positive thinking: agency and pathways (Snyder et al., 1991). Agency thinking reflects beliefs that one can meet specific goals, and pathways thinking corresponds to perceptions that one can over­ come goal-blocking obstacles. Higher levels of global hope are robustly associated with greater psychological well-being and proactive health behaviors (see Rand & Cheavens, 2009; Rasmussen et al., 2018 for 291 J.L. Barinas et al. Journal of Professional Nursing 42 (2022) 290–300 Anxiety The present study Anxiety is another commonly reported mental health concern in nursing students (Chernomas & Shapiro, 2013; Cowen et al., 2016; Villeneuve et al., 2018). During the COVID-19 pandemic, studies found that over half of nursing students (55.9 %) reported moderate or severe symptoms of anxiety (Savitsky et al., 2020). Researchers have suggested that nursing students may be susceptible to anxiety due to academic demands and facing new, often high-stress situations in clinical settings (Duty et al., 2016; Kim, 2003; Wang et al., 2019). In the extant litera­ ture, anxiety and physical activity research has primarily consisted of exercise intervention studies (Conn, 2010; Rebar et al., 2015). However, Thome and Espelage (2004) found that college students with anxiety were more likely to engage in exercise only if disordered eating was present. College students without anxiety were less likely to engage in exercise (Thome & Espelage, 2004). Thus, depending on contextual factors, anxiety may lead to unhealthy weight control behaviors such as over-exercising or skipping meals. Anxiety is often comorbid with depression, and thus, the same factors that may steer nursing students away from healthy eating behaviors (e.g., lack of time and energy) may also be present for students with greater anxiety symptomology. Our review of the literature revealed several positive and negative psychosocial variables that may be relevant to healthy and unhealthy weight control behaviors. However, comparatively little research exists with these constructs in relation to weight control behaviors among nursing students specifically. While the available evidence suggests that each of these constructs could be relevant to weight control behavior among any college-aged individual, researchers have noted that nursing students may have unique mental health profiles compared to other students (McDermott et al., 2021). Therefore, a central goal of the pre­ sent study was to examine the possible utility of these constructs as potential intervention targets by assessing each construct's relationship with healthy and unhealthy weight control behaviors in a nursing stu­ dent sample. It also is important to note that the eight psychological, behavioral, and social variables reviewed for this study do not exist in isolation. For example, depression symptoms are often comorbid with anxiety symp­ toms (Pollack, 2005). Although conceptually distinct constructs (Rand, 2018), hope and self-efficacy are also positively correlated (O'Sullivan, 2011). Likewise, social support has been negatively associated with anxiety and depression (Gariépy et al., 2016). In other words, each of the eight psychosocial variables reviewed are likely interrelated. Therefore, a second goal of the present study was to understand which variables were the most salient correlates of healthy and unhealthy weight control behaviors. Such information will help identify the critical intervention targets that can be reduced (psychosocial deficits) or enhanced (psy­ chosocial strengths) to help nursing students maintain a healthy weight in a healthy way. Two primary hypotheses (one for each set of psychosocial constructs) guided our analyses. First (Hypothesis 1), we expected health-specific hope, health self-efficacy, social support, and body satisfaction to be positively associated with healthy weight control behaviors and nega­ tively associated with unhealthy weight control behaviors. Second (Hypothesis 2), we also predicted that depression, anxiety, barriers to physical activity, and perceiving oneself as overweight would be nega­ tively associated with healthy weight control behaviors and positively associated with unhealthy weight control behaviors. Given the lack of research on the present psychosocial variables among nursing students, we did not advance any hypotheses specific to which of these constructs would be most relevant to either healthy or unhealthy weight control. Barriers to physical activity Exercise has been shown to be an essential component in many weight control strategies due to its numerous mental and physical health benefits (Pascoe et al., 2020; Zhang et al., 2021). While healthy physical activity does not burn a significant number of calories to contribute to short-term weight loss, it is a very strong predictor of success with longterm weight control (6–24 months; Franz et al., 2007; Ostendorf et al., 2018; Rojo-Tirado et al., 2021). As a result, barriers to physical activity, such as limited time or motivation, are critical factors influencing overall weight management. It is a logical proposition that nursing students who perceive barriers in this domain will also engage in fewer healthy weight control behaviors. In addition, barriers to physical ac­ tivity may lead to unhealthy weight control practices that are perceived as easier to implement (e.g., diet pills, disordered eating practices). Body appraisals Our last category of psychosocial variables encompasses two con­ structs related to body appraisals. The first, body satisfaction, has been conceptualized as positive body image or having respect and acceptance for one's body (Tiggemann & McCourt, 2013; Tylka, 2011; Tylka & Wood-Barcalow, 2015b). Positive body image has been linked to higher levels of intuitive eating and psychological well-being, specifically selfesteem and coping, and lower levels of disordered eating behaviors among women (Tylka & Wood-Barcalow, 2015a). Additionally, WoodBarcalow et al. (2010) reported that individuals presenting with positive body image are more likely to care for their appearance through physical activity and healthy eating. In addition to an overall positive body image, one's weight perception (i.e., how much one believes they conform to or deviate from an appropriate weight) may be particularly relevant to weight control be­ haviors. Indeed, the eating disorder literature has shown that weight perception plays an important role in driving weight control behaviors (Alcaraz-Ibáñez et al., 2021; Harring et al., 2010). Inaccurate percep­ tions of body weight, when individuals perceive themselves to be overweight, underweight, or of ideal weight, can result in vastly different outcomes. For example, studies have found that college stu­ dents who had weight perceptions higher than their actual weight were more likely to engage in unhealthy weight control compared to those with accurate weight perceptions (Harring et al., 2010; Wharton et al., 2008). However, to our knowledge, no studies have focused on exam­ ining weight perceptions among nursing students in the U.S. Method Design A cross-sectional online survey design was used to examine how various psychosocial variables related to healthy and unhealthy weight control among nursing students. Procedures and participants With approval from the University of South Alabama's institutional review board, we recruited via email a randomly selected sample of 500 junior and senior nursing students enrolled at a university located in the southeastern U.S. Data for the present study was collected as part of the first wave of an ongoing longitudinal mixed-methods research project examining nursing student health at the same institution. Although an accurate response rate could not be determined since the number of students who accessed the recruitment email is unknown, 56 % (N = 279) of students who were sent the survey link participated in the online survey. To protect participant anonymity, participants were not asked to provide identifying information as part of the online survey and, instead, a unique ID was created for each participant. Following the survey, participants were directed to a website (separate and unrelated to the survey website) where they entered their email to receive study 292 J.L. Barinas et al. Journal of Professional Nursing 42 (2022) 290–300 compensation (a $10 gift card). The final sample included 241 nursing students. nutrition (5 items) and physical activity (5 items) scales were used. Participants were asked to rate how certain they felt they could over­ come barriers related to eating healthy foods and carrying out exercise intentions. Response options range from 1 (very uncertain) to 4 (very certain). A composite score was generated from the physical activity and nutrition scales. Scores ranged from 10 to 40, with higher scores indi­ cating a greater degree of health self-efficacy. Prior research has shown good internal consistency with a Cronbach's α of 0.88 for exercise and 0.87 for nutrition (Schwarzer & Renner, 2009). For the current study, Cronbach's alpha was 0.94 for the exercise subscale and 0.93 for the nutrition subscale. Measures Healthy and unhealthy weight control Healthy and unhealthy weight control behaviors were assessed using instruments from the Project Eat-III Survey (Larson et al., 2011). The healthy weight control measure consisted of 6 items which asked par­ ticipants to rate how often (1 = never to 4 = on a regular basis) within the past year they engaged in six recommended weight management prac­ tices (i.e., exercising, eating more fruits and vegetables, eating less highfat foods). Scores ranged from 6 to 24 with higher scores indicating more frequent practice of healthy weight control. The unhealthy weight control measure consisted of 9 items. Participants indicated whether or not they had engaged in unhealthy methods of losing weight or main­ taining their weight (i.e., using laxatives, using a food substitute, skip­ ping meals, etc.) within the past year. These responses were totaled to create a score ranging from 0 to 9. In the current study, Cronbach's alpha was 0.90 for healthy weight control and 0.71 for unhealthy weight control. Weight perception Weight perception was measured using a single item from the Project EAT III Survey (Larson et al., 2011). Participants were asked to indicate how they viewed their weight status on a five-point scale ranging from 1 (very underweight) to 5 (very overweight). Social support The Multidimensional Scale of Perceived Social Support (MSPSS; Zimet et al., 1988) consists of 12 items assessing perceived availability of social support (including emotional and practical support). For the purposes of the current study, two MSPSS subscales were used to assess support from family (4 items) and friends (4 items), while the significant other subscale was excluded. Participants rated the degree to which they agreed with each statement on a scale from 1 (very strongly disagree) to 7 (very strongly agree). Scores ranged from 8 to 56. The average of ratings was used to generate an overall score. Internal consistency for the sample was excellent (Cronbach's α = 0.93). Anxiety Anxiety was assessed using the Generalized Anxiety Disorder-2 scale (GAD-2; Kroenke et al., 2007), which consists of two items from the GAD-7 scale (Spitzer et al., 2006). The items describe the following anxiety symptoms: “feeling nervous, anxious, or on edge” and “not being able to stop or control worrying.” For each item, participants rated how frequently they had experienced the anxiety symptoms within the past two weeks. Response options ranged from 0 (not at all) to 3 (nearly every day). Ratings were summed to produce a total score, with higher scores indicating higher severity anxiety, and a score of 3 or greater indicating clinically significant anxiety symptoms. For the present study, Cron­ bach's alpha was 0.85. Barriers to physical activity This was assessed using a six-item measure from the Project Eat-III Survey (Larson et al., 2011). Items assessed how often a series of bar­ riers (e.g., weather, time, concerns about fatigue or injury, embarrass­ ment related to appearance) interfered with physical activity. Response options ranged from 1 (never) to 5 (very often) and scores ranged from 6 to 30, with higher scores indicating more frequent barriers to physical activity. Cronbach's alpha for this measure was 0.72. Depression The Patient Health Questionnaire-2 (PHQ-2; Kroenke et al., 2003), a two-item screening questionnaire, was used to assess depression in the sample. Participants were asked how often in the previous two weeks they had experienced the following: “little interest or pleasure in doing things” and “feeling down, depressed, or hopeless.” Response options ranged from 0 (not at all) to 3 (nearly every day). Scores were summed to produce a depression severity score, which ranged from 0 to 6. A score of 3 or greater suggests clinically significant symptoms of depression. This measure has been shown to have a sensitivity of 83 % and a specificity of 92 % for Major Depressive Disorder (Kroenke et al., 2003). In the present study, Cronbach's alpha was 0.85. Body satisfaction Body satisfaction was assessed using a modified version of a survey by Neumark-Sztainer et al. (2006), which was used in the Project Eat III Survey (Larson et al., 2011) and based on the Body Shape Satisfaction Scale (Pingitore et al., 1997). The modified survey assessed satisfaction with the following body parts and features: weight, height, complexion, face, stomach, breasts, buttocks, hips, upper thighs, general muscle tone, and overall body size and shape. Items assessing satisfaction with body build, shoulders, chest, and overall body fat were not included in our study. Response options ranged from 1 (extremely dissatisfied) to 6 (extremely satisfied). Items were summed for a possible score between 11 and 66, with higher scores indicating more body satisfaction. Cronbach's alpha was 0.90. Health-specific hope The Goal-Specific Hope Scale (Feldman et al., 2009) was modified to assess hopefulness in the context of health goals. For example, an item from the original measure reads, “My past experiences have prepared me well for trying to attain this goal.” The modified version in our study used the same statement, but instead of ending with “this goal,” the statement referred to “my health goal.” In addition, a seventh item was added, which asked participants to rate the degree to which the following statement describes them, “I've been pretty successful in meeting my health goals in the past.” Items were rated on a scale from 1 (definitely false) to 8 (definitely true) and ratings were summed to produce a total score, with scores ranging from 7 to 56. Internal consistency for the current study was excellent (Cronbach's α = 0.94). Analysis plan Structural equation modeling (SEM) was used to explore relation­ ships between the 8 psychosocial factors and healthy and unhealthy weight control behaviors. SEM is broad family of statistical methods used to measure and analyze the relationships of observed (i.e., actual observations or scores on an instrument that contain measurement error) and latent variables (i.e., a person's true scores without mea­ surement error). SEM provides the most rigorous test available of the relationships between constructs because it removes measurement error (Kline, 2016) that can otherwise significantly bias results (Cole & Preacher, 2014). Our analyses were conducted using Mplus Version 8 (Muthén et al., Health self-efficacy The Health Self-Efficacy scales by Schwarzer and Renner (2009) consist of 13 items that measure self-efficacy in the context of nutrition, physical activity, and alcohol resistance. For the present study, only the 293 J.L. Barinas et al. Journal of Professional Nursing 42 (2022) 290–300 2017) and consisted of two steps based on recommended practice (Kline, 2016). First, a measurement model was tested to determine whether latent variables were adequately represented by each of their respective measured indicators. Second, a structural model was evaluated in which regression paths were specified from each psychosocial factor to the two dependent variables of healthy and unhealthy weight control, respec­ tively. Evaluating both the measurement and structural models allowed us to identify differences between correlations at the measurement model level (i.e., correlations without controlling for any of the other psychosocial predictors) and regression paths at the multivariate level (i. e., controlling for the contributions of the other psychosocial predictors). The following fit indices and corresponding thresholds (Kline, 2016) were used to evaluate each model: the Root Mean Square Error of Approximation (RMSEA) with 90 % confidence intervals [CI] (values of 0.06 or less indicate a good fit); the Comparative Fit Index (CFI) and the Tucker Lewis Index (TLI) (values close to 0.95 indicate a good fit); and the standardized root-mean-square residual (SRMR; values of 0.08 or less indicate a good fit). The chi-square test statistic was also evaluated, with a non-significant value indicating a perfect fit to the data (Kline, 2016). Full Information Maximum Likelihood (FIML) methodology was used to address missing data, and a maximum likelihood estimator with robust standard errors (MLR) was used to correct for the influence of non-normality on indices of fit. Table 1 Demographic characteristics of the nursing student sample (N = 241). Gender Female Male Other Race/ethnicity African American/Black Native American Asian American/Asian Hispanic/Latino(a) White non-Hispanic Multiracial/Other Academic level Junior Senior No classification provided Employment Full time Part time Unemployed Other Body mass index Underweight Healthy weight Overweight or obese PHQ-2 score > 3 GAD-2 score > 3 Currently receiving mental health treatment Results Preliminary analyses n % 217 23 1 90.0 9.5 0.4 32 1 8 10 182 8 13.3 0.4 3.3 4.1 75.5 3.3 108 123 10 44.8 51.0 4.1 6 109 125 1 2.5 45.2 51.9 0.4 7 122 112 64 147 48 2.9 50.6 46.5 26.6 61.0 19.9 measuring the same constructs. Measures consisting of a single item were retained as manifest variables. A measurement model Confirma­ tory Factor Analysis (CFA) had the resulting indices of fit (χ2 [255] = 343.89, p < .001; RMSEA = 0.038, [90 % CI = 0.027, 0.048]; CFI = 0.980; TLI = 0.975; SRMR = 0.042). Although the chi-square value was significant, the CFI and TLI values were >0.95, and the RMSEA and SRMR were within the recommended cutoffs for good fit to the data. Thus, the measurement model suggested acceptable fit. Additionally, the constructs in the model were adequately assessed, as evidenced by large significant factor loadings for each of their respective latent variables (ranging from 0.61 to 0.99 as shown in Table 3). Bivariate correlations of all variables of interest with healthy and unhealthy weight behaviors from the measurement model are dis­ played in Table 4. Anxiety, depression, weight perception, and barriers to physical activity had moderate positive correlations with unhealthy weight control. Body satisfaction had a moderate negative correlation with unhealthy weight control. Weight perception, health self-efficacy, and health-specific hope had moderate positive correlations with healthy weight control. Prior to conducting our analyses, data were screened for missing values, univariate and multivariate outliers, and non-normality. In the original sample of 279 participants, the unhealthy weight control and healthy weight control measures had 20 % or more missing data for 9.3 % (n = 26) and 1.8 % (n = 5) of cases, respectively. As such, these participants were removed from the sample. An additional 6 partici­ pants (2.2 %) were removed from the sample due to having extreme values on one of the following measures: health-related hope (n = 2), weight discrepancy (n = 3), and social support (n = 1). Since only three multivariate outliers were identified based on the Mahalanobis distances measure, no additional cases were removed from the sample, as rec­ ommended by Meyers et al. (2017). A small percentage of participants were still missing values in the final sample of 241. A series of Bonferroni-adjusted t-testes revealed that individuals missing some (i.e., <20 %) of responses on healthy weight and unwealthy weight control items reported less health self-efficacy than individuals with complete data on these dependent variables. Thus, data were likely missing at random, indicating a need for FIML in our primary analysis (Schlomer et al., 2010). Participants had a mean age of 23 years (SD = 5.29). The sample was predominately female (90 %) and Caucasian (76 %), and almost half (47 %) had a BMI in the overweight or obese range. Please see Table 1 for a summary of sample characteristics. Several study variables evidenced large positive or negative skew­ ness; however, the residuals from multivariate regressions screening tests were normally distributed. Finally, multicollinearity diagnostics indicated that there was not a linear dependency among factors (i.e., tolerance ranged from 0.57 to 0.82, and variance inflation ranged from 1.2 to 1.9). Means, standard deviations, and correlations between all variables are shown in Table 2. Structural model After evaluating the measurement model, we assessed a structural model of the combined effect of the eight selected psychosocial domains in predicting healthy and unhealthy weight control behaviors (see Fig. 1 for a conceptual depiction of the structural model). Specifically, the structural model was formed with predictive paths from each psycho­ social latent and manifest variable to the two healthy and unhealthy weight control latent variables. The structural model evidenced acceptable fit, χ2 (255) = 343.89, p < .001; CFI = 0.980; TLI = 0.975; RMSEA = 0.038 [90 % CI = 0.027, 0.048]; SRMR = 0.042. However, after controlling for each other, several of the significant bivariate as­ sociations from the measurement model became non-significant. Among the positive psychosocial predictors, non-significant associations included the paths from social support and body satisfaction to each outcome variable and the path from health-self-efficacy to unhealthy weight control. Among the negative psychosocial predictors, the paths from depression and barriers to physical activity to each outcome Measurement model Following procedures described by Little et al. (2002), measures comprised of six or more items were parceled to preserve statistical power, with each latent variable consisting of three manifest parcels to ensure model identification. This process allowed us to condense the items from unidimensional measures into a smaller set of item parcels all 294 J.L. Barinas et al. Journal of Professional Nursing 42 (2022) 290–300 Table 2 Bivariate correlations, means, and SDs among the measured research variables. 1. Unhealthy weight control 2. Healthy weight control 3. GAD-2 4. PHQ-2 5. Health-specific hope 6. Health self-efficacy 7. Social support 8. Body satisfaction 9. Weight perception 10. Barriers to physical activity 1 2 3 4 5 6 7 8 1.00 0.33** 1.00 0.27** − 0.01 1.00 0.27** − 0.01 0.59** 1.00 − 0.14* 0.22** − 0.22** − 0.33** 1.00 − 0.07 0.33** − 0.27** − 0.28** 0.61** 1.00 − 0.14* 0.08 − 0.13* − 0.31** 0.33** 0.26** 1.00 − − − − 0.37** 0.01 0.31** 0.24** 0.41** 0.31** 0.20** 1.00 9 10 M SD 0.35** 0.24** 0.01 0.06 − 0.28** − 0.14* 0.03 − 0.43** 1.00 0.20** − 0.14* 0.32** 0.31** − 0.40** − 0.51** − 0.15* − 0.39** 0.11 1.00 2.06 15.93 3.49 1.80 5.79 26.67 5.78 23.10 3.71 16.56 1.94 4.93 1.90 1.69 1.46 6.14 1.11 7.57 0.80 4.68 Note. N = 241. M = mean; SD = standard deviation. * p < .05. ** p < .01. Table 3 Factor loading of the measured indicators on the latent variables in the mea­ surement model. Variable Unhealthy weight control Parcel 1 Parcel 2 Parcel 3 Healthy weight control Parcel 1 Parcel 2 Parcel 3 Health-specific hope Parcel 1 Parcel 2 Parcel 3 Health self-efficacy Parcel 1 Parcel 2 Parcel 3 Social support Parcel 1 Parcel 2 Parcel 3 Body satisfaction Parcel 1 Parcel 2 Parcel 3 Barriers to physical activity Parcel 1 Parcel 2 Parcel 3 Depression PHQ-2 Item 1 PHQ-2 Item 2 Anxiety GAD-2 Item 1 GAD-2 Item 2 *** Unstandardized factor loading SE Table 4 Correlations with weight control behaviors at the bivariate, measurement model level. Standardized factor loading 1.00 1.18 0.96 – 0.19 0.12 0.73*** 0.68*** 0.61*** 1.00 1.09 1.06 – 0.05 0.05 0.86*** 0.87*** 0.91*** 1.00 1.13 1.11 – 0.05 0.06 0.90*** 0.95*** 0.90*** 1.00 1.01 1.02 – 0.03 0.03 0.94*** 0.96*** 0.90*** 1.00 1.07 1.01 – 0.03 0.03 0.99*** 0.97*** 0.94*** 1.00 1.07 1.04 – 0.04 0.05 0.88*** 0.95*** 0.92*** 1.00 1.22 0.89 – 0.21 0.07 0.79*** 0.76*** 0.65*** 1.00 1.11 – 0.08 0.83*** 0.90*** 1.00 1.05 – 0.07 0.87*** 0.85*** Variable GAD-2 PHQ-2 Health-specific hope Health self-efficacy Social support Body satisfaction Weight perception Barriers to physical activity Unhealthy weight control behaviors − − − − 0.36*** 0.34*** 0.18* 0.08 0.18* 0.39*** 0.41*** 0.29** Healthy weight control behaviors − 0.00 − 0.01 0.25*** 0.37*** 0.09 − 0.02 0.25*** − 0.15 Note. N = 241. * p < .05. ** p < .01. *** p < .001. weight perception, and anxiety emerged as the most significant pre­ dictors in the model. In partial support of our first hypothesis, results from the structural model revealed that health self-efficacy had a sig­ nificant positive association with healthy weight control (B = 0.38, SEB = 0.12, β = 0.30, p = .001). By contrast, weight perception (B = 0.08, SEB = 0.02, β = 0.42, p < .001) and anxiety (B = 0.06 SEB = 0.02, β = 0.34, p < .001) emerged as factors contributing to unhealthy weight control. Consistent with hypothesis 2, weight perception and anxiety were positively associated with unhealthy weight control. Unexpect­ edly, weight perception also had a statistically significant positive as­ sociation with healthy weight control (B = 0.32, SEB = 0.06, β = 0.34, p < .001). Please see Table 5 for regression path coefficients for the final model. The structural model explained 23 % of the variance in healthy weight control and 29 % of the variance in unhealthy weight control. Discussion In the present study we examined a number of positive and negative psychosocial factors in relation to weight control behaviors. We sought to identify which of these factors would be most strongly related with healthy versus unhealthy weight control. Based on prior research we had expected (Hypothesis 1) strength-based or health-promoting factors (including health-specific hope, health self-efficacy, social support, and body satisfaction) to be positively associated with healthy weight con­ trol and negatively associated with unhealthy weight control. We also predicted that (Hypothesis 2) depression, anxiety, barriers to physical activity, and weight perception would be positively associated with unhealthy weight control and negatively associated with healthy weight control. Since this study was in part exploratory, no hypotheses were advanced regarding which factors would be the most salient to healthy versus unhealthy weight control. p < .001. variable, and the path from anxiety to healthy weight control were not significant. Given the large number of non-significant paths, we tested if a more parsimonious model could be fit to the data by constraining nonsignificant paths to zero. The trimmed model produced good fit, χ2 (265) = 360.48, p < .001; CFI = 0.979; TLI = 0.974; RMSEA = 0.039 [90 % CI = 0.028, 0.048]; SRMR = 0.051. As a result, the more parsi­ monious model held, with a scaled chi-square indicating the trimmed model was not significantly different from the unconstrained model, Δχ2 (10) = 16.66, p = .082. The results of the trimmed model showed that health self-efficacy, 295 J.L. Barinas et al. Journal of Professional Nursing 42 (2022) 290–300 Health Self-Efficacy Health-Specific Hope Perceived Social Support Healthy Weight Control Weight Perception Barriers to Physical Activity Unhealthy Weight Control Body Satisfaction Anxiety Depression Fig. 1. Conceptual model interrelating eight psychosocial factors with healthy and unhealthy weight control. Bolded arrows represent paths that remained sig­ nificant after controlling for all other psychosocial variables. Dashed arrows represent the paths that became non-significant after controlling for the other psy­ chosocial variables. significant positive correlations with unhealthy weight control. Still, only barriers to physical activity had a negative (weak) correlation with healthy weight control, and weight perception had an unexpectedly positive correlation with healthy weight control in our measurement model. Although many psychosocial variables were associated with healthy and unhealthy weight control in our measurement model (i.e., when we did not control for the other predictors in the models), the multivariate model allowed us to identify which of these variables were the most salient for weight control behaviors. We found that three of the eight psychosocial variables examined had the greatest influence on weight control behavior in our structural model when controlling for the other psychosocial predictors. Moreover, given that the trimmed (more parsimonious) model was an equal fit to the data as the model with all eight predictors included, our results indicate that anxiety, health selfefficacy, and weight perceptions accounted for all of the predictive work of the other five psychosocial variables combined. In the trimmed structural model, only weight perception emerged as a predictor of both healthy and unhealthy weight control behaviors. These results were consistent with prior research which has shown that perceptions about one's weight status is an important factor influencing weight management behaviors (Haynes et al., 2018; Lemon et al., 2009). The majority of prior research has linked weight perception with un­ healthy weight control behaviors, such as disordered eating (AlcarazIbáñez et al., 2021; Kennedy et al., 2019). However, there is also research that suggests that assessing one's weight status accurately can help motivate the initiation of healthy weight control behaviors like regular physical activity (Edwards et al., 2010). While we were unable to Table 5 Unstandardized and standardized regression path coefficients from the struc­ tural model. Variable GAD-2➔ PHQ-2➔ Health specific hope➔ Health selfefficacy➔ Social support➔ Body satisfaction➔ Weight perception➔ Barriers to physical activity➔ Unhealthy weight control Healthy weight control B SEB β B SEB β 0.061 – – 0.015 – – 0.342*** – – – – – – – – – – – – – – 0.379 0.116 0.304** – – 0.080 – – 0.016 – – 0.417*** – – 0.319 – – 0.063 – – 0.341*** – – – – – – Note. N = 241. ** p < .01. *** p < .001. The results of the present study partially supported these hypotheses. At the bivariate level, there was greater support for the proposed hy­ potheses. For example, as predicted in hypothesis 1, health-specific hope, health self-efficacy, social support, and body satisfaction were all negatively correlated with unhealthy weight control. However, only health self-efficacy and health-specific hope were positively correlated with healthy weight control. As predicted in hypothesis 2, anxiety, depression, weight perception and barriers to physical activity all had 296 J.L. Barinas et al. Journal of Professional Nursing 42 (2022) 290–300 evaluate how accurate the weight perceptions were in the current model due to not weighing and measuring participants directly, our results do provide some clues as to why weight perceptions may be important to both unhealthy and healthy weight control among nursing students. Consistent with research that has shown that weight perceptions could lead to either healthy or unhealthy weight control behaviors, our findings revealed that weight perceptions combined with anxiety may lead to greater unhealthy weight control. Anxiety can be characterized by worries about current or future stressors and negative evaluations of one's ability to manage these stressors (Bandura, 1988). These negative evaluations may translate to low self-efficacy and avoidance behaviors in the context of healthy weight management practices (Bandura, 1988). As such, nursing students experiencing anxiety may be less likely to engage in healthy weight management practices, especially those they perceive as time-consuming (Blake, Stanulewicz, & Mcgill, 2017) or costly (Grant-Smith & de Zwaan, 2019). It is also possible that nursing students who reported higher levels of anxiety may have more difficulty managing their distress in the context of academic and training de­ mands, leaving fewer resources (i.e., time and energy) for them to engage in healthy behaviors, such as preparing healthy meals or exer­ cising. Furthermore, there is some evidence that suggests some in­ dividuals use unhealthy eating as a way to self-regulate their negative emotions, such as anxiety (Braden et al., 2018; Evers et al., 2018). As a result of these barriers, nursing students may turn to unhealthy weight control behaviors that may be perceived as easier in the short-term (e.g., diet pills, skipping meals, or diuretics; Levinson et al., 2020; Stanton et al., 2021). While unhealthy weight control was best predicted by a combination of perceiving oneself as overweight and experiencing symptoms of anxiety, similar weight perceptions were associated with healthy weight control behaviors when combined with greater health self-efficacy. Nursing students who reported a higher sense of self-efficacy may have a positive evaluation of themselves and their ability to implement healthy behavior change. Given that prior research has shown nursing students face challenges in managing their health, these findings provide useful insights regarding the most salient psychosocial facilitators and barriers to healthy weight management among nursing students. for future research by this team. Implications The findings of this study have important implications for in­ terventions aiming to improve the health and wellbeing of nursing students. The results revealed that anxiety, above and beyond all other psychosocial factors, played a significant role in unhealthy weight control. Similarly, health self-efficacy was the most critical factor related to healthy weight control. For these reasons, to improve the efficacy of intervention efforts among nursing students, addressing anxiety, and increasing self-efficacy should be prioritized. This can be accomplished by going beyond teaching nursing students about healthy eating and exercise habits. The need for health and wellbeing programs that normalize self-care practices and use evidencebased strategies has been noted across nursing programs nationwide (Melnyk et al., 2016; Melnyk et al., 2021). Cognitive behavioral in­ terventions are an ideal approach to help nursing students cope with anxiety and stress more effectively, as they involve skill development in relation to problem-solving; relaxation; and turning unhelpful or nega­ tive automatic thoughts into more adaptive ones (van der Riet et al., 2018). The MINDSTRONG© program developed Melnyk et al. (2020) is an example of a cognitive behavioral skills program designed for nursing students that has been shown to reduce both depression and anxiety. Furthermore, health self-efficacy can be enhanced by helping nursing students develop the skills needed to: a) establish, plan for, and monitor achievable health behavior goals and b) address or work around barriers to managing their health (Pekmezi et al., 2009). Mc Sharry and Timmins (2016) provide an example of an integrated intervention for nursing students, which consists of the following: evidence-based information about healthy habits and ways of promoting mental health; motivational interviewing strategies; and hands-on fitness workshops. Integrative approaches to weight management interventions, like those described above, would be a more comprehensive way to promote the health and wellbeing of our nursing students, who are indeed the future of nursing. Conclusion Limitations The present study sought to explore the relationships between a variety of psychosocial factors and healthy and unhealthy weight con­ trol behaviors among nursing students. The findings showed that while weight perception was related to weight control behavior in general, anxiety and health self-efficacy above all other factors were the most important in differentiating students who engaged in healthy versus unhealthy weight management strategies. Such findings suggest that to support nursing students in managing their weight effectively, in­ terventions should incorporate anxiety management skills to reduce the risk of unhealthy weight control, as well as enhance health self-efficacy to increase healthy weight management strategies. The present study had a few limitations. First, data from one wave of a longitudinal study was used; thus, it was correlational and crosssectional in nature. Therefore, we are unable to determine the tempo­ ral order of variables or make conclusions about causality. In addition, self-report measures were used for constructs that may be particularly susceptible to recall and self-presentation bias. To address these limi­ tations, future research in this area should implement longitudinal and experimental designs to better understand how psychosocial variables such as anxiety affect weight control behaviors in this population over time. Given that our model explained <30 % of the variance in our outcomes, it is important to continue exploring other relevant variables that may help explain weight control behavior. There were also limitations related to specific measures. Weight perceptions were assessed using only a single item in our study, which likely did not fully capture the construct. Relatedly, social support and health self-efficacy were assessed using only two of three subscales from the measures selected. For this reason, it is important to note that future studies may benefit from using more comprehensive measures for each construct. Furthermore, participants for the study were recruited from a single nursing program in the southern United States and the overall sample lacked diversity with regard to race and gender. For these rea­ sons, the findings of this study may not generalize to U.S. nursing stu­ dents more broadly. 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