Demography of Russia and the Former Soviet Union Lecture 8 Sociology SOCI 20182 The Concept of Life Table Life table is a classic demographic format of describing a population's mortality experience with age. Life Table is built of a number of standard numerical columns representing various indicators of mortality and survival. The concept of life table was first suggested in 1662 by John Graunt. Before the 17th century, death was believed to be a magical or sacred phenomenon that could not and should not be quantified. The invention of life table was a scientific breakthrough in mortality studies. Life Table Cohort life table as a simple example Consider survival in the cohort of fruit flies born in the same time Number of dying, d(x) Number of survivors, l(x) Number of survivors at the beginning of the next age interval: l(x+1) = l(x) – d(x) Probability of death in the age interval: q(x) = d(x)/l(x) Probability of death, q(x) Person-years lived in the interval, L(x) Lx = x lx + lx + x 2 L(x) are needed to calculate life expectancy. Life expectancy, e(x), is defined as an average number of years lived after certain age. L(x) are also used in calculation of net reproduction rate (NRR) Calculation of life expectancy, e(x) Life expectancy at birth is estimated as an area below the survival curve divided by the number of individuals at birth Life expectancy, e(x) T(x) = L(x) + … + Lω where Lω is L(x) for the last age interval. Summation starts from the last age interval and goes back to the age at which life expectancy is calculated. e(x) = T(x)/l(x) where x = 0, 1, …,ω Life Tables for Human Populations In the majority of cases life tables for humans are constructed for hypothetic birth cohort using crosssectional data Such life tables are called period life tables Construction of period life tables starts from q(x) values rather than l(x) or d(x) as in the case of experimental animals Formula for q(x) using age-specific mortality rates qx = Mx 1 + (1 ax ) Mx a(x) called the fraction of the last interval of life is usually equal to 0.5 for all ages except for the first age (from 0 to 1) Having q(x) calculated, data for all other life table columns are estimated using standard formulas. Life table probabilities of death, q(x), for men in Russia and USA. 2005 1 0 10 20 30 40 50 60 log(q(x)) 0.1 0.01 0.001 0.0001 Age Russia USA 70 80 90 100 Period life table for hypothetical population Number of survivors, l(x), at the beginning is equal to 100,000 This initial number of l(x) is called the radix of life table Life table number of survivors, l(x), for men in Russia and USA. 2005. 120000 100000 80000 Russia 60000 USA 40000 20000 0 0 10 20 30 40 50 60 70 80 90 100 Life table number of dying, d(x), for men in Russia and USA. 2005 Russia USA 3500 3000 d(x) 2500 2000 1500 1000 500 0 0 10 20 30 40 50 Age 60 70 80 90 100 e(x) Life expectancy, e(x), for men in Russia and USA. 2005 80 70 60 50 40 30 20 10 0 Russia USA 0 10 20 30 40 50 Age 60 70 80 90 100 Trends in life expectancy for men in Russia, USA and Estonia Trends in life expectancy for women in Russia, USA and Estonia Distribution of life expectancy, Men, 1999 Distribution of life expectancy, Women, 1999 Mortality reversal Situation when the usual time trend of declining mortality is reversed (mortality is increasing over time). Observed in sub-Saharan Africa (AIDS epidemic), Eastern Europe, and FSU countries including Russia. Mortality Reversal in FSU countries and Russia is particularly strong among male population, with excess mortality at ages about 35-55 years. Particularly high increase in mortality from violence and accidents among manual workers and low education groups. Decline of life expectancy at age 15 between 1998-2005. Men Decline of life expectancy at age 15 between 1998-2005. Women Recent changes in life expectancy in Russia Men Women 80.00 Life expectancy at birth 75.00 70.00 65.00 60.00 55.00 Source: Goskomstat Russia 20 08 20 06 20 04 20 02 20 00 19 98 19 96 19 94 19 92 19 90 50.00 The theory of epidemiological transition Omran, Abdel R. 1971. The epidemiologic transition: A theory of the epidemiology of population change. Milbank Memorial Fund Quaterly, 29: 509-538 Definition The epidemiologic transition is that process by which the pattern of mortality and disease is transformed from one of high mortality among infants and children and episodic famine and epidemic affecting all age groups to one of degenerative and man-made diseases (such as those attributed to smoking) affecting principally the elderly. (Encyclopedia Britannica) Stages of the Epidemiologic Transition Pestilence and Famine Receding Pandemics Degenerative and man-made diseases Three stages of epidemiological transition (Omran) “The Age of Pestilence and Famine when mortality is high and fluctuating, thus precluding sustained population growth.” LE – 20-40 years “The Age of Receding Pandemics when mortality declines progressively. LE increases steadily from 30 to 50 years. Sustained population growth “The Age of Degenerative and Man-Made Diseases when mortality continues to decline and eventually approaches stability.” LE exceeds 50 years. •The shifts in disease patterns in the 19th century were primarily related to changing in socioeconomic development. In the 20th Century more related with disease control activities independent of socio-economic development: e.g. Mexico, China The fourth stage It was believed that by the 1970s life expectancy reached a plateau corresponding to the biological limit to human life However around that time many Western countries started to demonstrate an increase in life expectancy mainly due to successful prevention and treatment of cardiovascular disease. This resulted in a rapid decline of mortality, particularly at older ages. Historical changes in the Gompertz-Makeham mortality components μ(x) = A + R e Makeham component declined in history (from 1900 to 1970) to very low values close to zero αx Gompertz component remained relatively stable during this period Gavrilov et al. 1983. Human life span stopped increasing: Why? Gerontology, 29(3): 176-180 Available: http://longevity-science.org/Mortality-Limits-1983.pdf Historical Changes in Mortality Swedish Females 1 1925 1960 1980 1999 Log (Hazard Rate) 0.1 0.01 0.001 0.0001 0 20 40 60 Age Data source: Human Mortality Database 80 100 Epidemiologic transition in Russia Soviet Union successfully passed all three stages of epidemiologic transition However Soviet health care system could not respond to the challenges of growing mortality from noncommunicable diseases The “Semashko” model of 1918 The health care system was under the centralized control of the state, which financed services as part of national social and economic development plans. All health care personnel became employees of the centralized state, which paid salaries and provided supplies to all medical institutions. The main policy orientation throughout this period was to increase numbers of hospital beds and medical personnel. Initial successes of governmentcontrolled model of health care Russia made massive strides in arresting the spread of infectious diseases. Drastic epidemic control measures were implemented against the spread of tuberculosis, typhoid fever, typhus, malaria and cholera. Community prevention approaches, routine check-ups, improvements in urban sanitation and hygiene, quarantines, etc. Moscow kindergarten, 1930s Vaccination in rural Turkmenistan, 1930s Before World War II Life expectancy (both sexes) 80 70 60 50 40 30 20 10 0 59 47 47 63 Russia 43 32 France USA 1900 1938 Catching up with the West Life expectancy in 1965 80 70 60 50 40 30 20 10 0 64.3 67.3 66.8 73.4 74.7 73.7 Russia France USA Men Women Stagnation after 1965 Mortality reversal Situation when the usual time trend of declining mortality is reversed (mortality is increasing over time). Observed in sub-Saharan Africa (AIDS epidemic), Eastern Europe, and FSU countries including Russia. Mortality Reversal in FSU countries and Russia is particularly strong among male population, with excess mortality at ages about 35-55 years. Particularly high increase in mortality from violence and accidents among manual workers and low education groups. Decline of life expectancy at age 15 between 1998-2005. Men Decline of life expectancy at age 15 between 1998-2005. Women Decomposition of the U.S.-Russia gap in life expectancy by cause USA – 1999; Russia – 2001. Source: Shkolnikov et a. Mortality reversal in Russia. Decomposition of the U.S.-Russia gap in life expectancy by cause USA – 1999; Russia – 2001. Source: Shkolnikov et a. Mortality reversal in Russia. Factors and Trends of Mortality and Health in Russia Sex Differentials of Mortality U.S. population in 1999 Gender gap in life expectancy In 1994 gender gap in life expectancy in Russia reached 13.7 years – the largest difference in life expectancy between sexes ever recorded Life table probability of death for Russian men and women, 2005 1 0 10 20 30 40 50 60 log(q(x)) 0.1 0.01 0.001 0.0001 Age Men Women 70 80 90 100 Life table number of dying for Russian men and women, 2005 Men Women 4000 3500 3000 d(x) 2500 2000 1500 1000 500 0 0 10 20 30 40 50 Age 60 70 80 90 100 Life expectancy in Russia Females Males Both 75 70 65 60 Calendar year 2003 1999 1995 1991 1987 1983 1979 1975 1971 1967 1963 55 1959 Life expectancy 80 The Role of Education LRC – Lipid Research Clinic study cohort in Moscow and St.Petersburg Education and life expectancy at working ages (20-69). Men, Russia Source: Shkolnikov et al., SSM, 1998 Why educated people live longer in Russia? Decomposition by cause of death The role of alcohol consumption in high mortality in Russia The consumption of alcohol has deep cultural roots in Russia where it typically accompanied celebrations, signified hospitality, and enhanced bonding among acquaintances and friends. It also was a tremendous sources of revenue for the Soviet state which exercised a monopoly on its production and distribution. Dynamics of alcohol consumption in Russia Liters of 100% alcohol per person per year 1 – V.Treml; 2 – Goskomstat estimate; 3-A.Nemtsov estimate; 4- sales of alcohol Alcohol is a driving force of mortality crisis in Russia Gorbachev’s anti-alcohol campaign, 1985-1987 Official sales of alcohol fell 51% Real consumption fell 27% Fall of alcohol sales was compensated by alcohol selfproduction Gorbachev anti-alcohol campaign The favorable effect of the anti-alcohol campaign on Russian mortality was strong and rapid. Mortality began to decrease immediately after the introduction of restrictions on the sale of alcohol in June 1985 and continued month by month in parallel with the reduction in alcohol consumption (Shkolnikov and Vassin, 1994). The largest mortality decrease was observed at adult ages both for males and females during the year 1986. From 1984 to 1987 (mostly in 1986), life expectancy at birth rose from 61.7 to 64.9 years for males and from 73 to 74.3 years for females. (From “Premature Death in the New Independent States,” NAS, 1997) Number of male deaths by month before and after the anti-alcohol campaign Number of deaths in thousand Trends in the number of deaths Millions of deaths Contribution of different causes of death to changes in LE, men Contribution of different causes of death to changes in LE, women Age and cause components of LE increase due to anti-alcohol campaign: Men Age and cause components of LE increase due to anti-alcohol campaign: Women Major effects of anti-alcohol campaign The highest decrease of mortality in regions with initial high levels of mortality at adult ages Regional inequality in mortality decreased Mortality decreased predominantly at middle adult ages due to reduction in external mortality and mortality from cardiovascular diseases Results of anti-alcohol campaign Over 1 million lives were saved Alcohol consumption was decreased but still remained high – 10.5-12.6 liter per person per year in 1986-1991 In 1984 estimated deaths due to direct and indirect effects of alcohol were 525,000 deaths or 31.8% of all registered deaths (4.4% in USA, 3.1% in Canada in 1995) Anti-alcohol campaign decreased alcohol-related number of deaths by 200,000 Estimates by A. Nemtsov. Mortality reversal Situation when the usual time trend of declining mortality is reversed (mortality is increasing over time). Observed in sub-Saharan Africa (AIDS epidemic), Eastern Europe, and FSU countries including Russia. Mortality Reversal in FSU countries and Russia is particularly strong among male population, with spikes of mortality at ages about 35-55 years. Particularly high increase in mortality from violence and accidents among manual workers and low education groups. In 1992 and 1998 Russia experienced two serious economic crises accompanied by drop in personal income and rapid impoverishment Alcohol and Inflation In 1992-1993 prices of alcohol increased much less than personal salaries and the general price index, which by June 1994 had increased to 1229 times its December 1992 level. Concurrently, prices of alcohol rose to 421 times their prior levels. It is not surprising that real alcohol consumption in Russia increased sharply during this period of economic crisis and reduction in real wages Total and alcohol-related mortality during the market reforms Total number of deaths in thousand (left) Deaths from acute poisoning by alcohol (right) Decline in alcohol quality during the market reforms In 1992 state monopoly on alcohol sales was abolished Self-production of alcohol became not profitable but over 20% of alcohol sales included technical alcohol Sample control tests showed that proportion of below quality standards alcohol was 5.6% in 1992 and 30.4% in 1994 Imported alcohol had even lower quality: 67.2% below quality standards --Change in all-cause mortality rates between 1990 and 1994 by age and sex, Russia Notzon, F. C. et al. JAMA 1998;279:793-800. Copyright restrictions may apply. Decomposition of changes in LE by cause of death, 1990-1994 Alcohol and suicide Suicide (1) and accidental poisoning by alcohol (3) – left Alcohol psychoses (2) - right Drinking and Suicide Number of suicides per 100,000 – left Alcohol (l) per person per year 1 – suicides with alcohol in blood ; 3 – sober suicides (left); 2- alcohol consumption Alcohol and cardiovascular mortality Alcohol intoxication is an additional risk factor for cardiovascular diseases During anti-alcohol campaign mortality from cardiovascular diseases decreased mainly due to atherosclerotic cardiosclerosis (by 19% in men) and stroke (by 8% in men) What about alcohol surrogates? Alcohol surrogates – non-food liquids containing ethanol (polishing liquids, perfume, pharmaceutical tinctures, etc.) Alcohol surrogates are cheap, so they are attractive to poor persons. May be the only source of ethanol for impoverished persons. 47% of men who used surrogates were unemployed. Only 13% of men not used surrogates were unemployed Northern Structure of Alcohol Consumption An example of Sweden Consumption of hard liquors and life expectancy Alcohol-related policy Explanations of Mortality Crisis in 1992-1994 Psychological Stress (and alcohol) Hypothesis (Shapiro, 1995; Cornia, Paniccia, 1995; Shkolnikov et al., 1998) Selection Hypothesis (‘selection of alcoholics’) by Avdeev, Blum, Zakharov, Andreev, 1997. Other Hypotheses (less supported by evidence) Mass impoverishment and malnutrition – if this hypothesis is true then infant mortality should increase Deterioration of the health care system – if this hypothesis is true then again infant mortality should increase Environmental pollution – environmental pollution should increase during 19921994 while in fact it decreased Protective role of education during 1992-1994 crisis Mortality of adult men with higher education level increased from 1989 to 1994 by 35% vs 57% for men with lower education level Mortality of adult women with higher education level increased by only 8% compared to 30% for women with lower education level Source: Shkolnikov et al., SSM, 1998 Suggested Factors of Mortality Increase During the Transition Period Rapid Impoverishment Social Stress Cardiovascular Diseases, Suicide Cheap Alcohol Injuries Expensive Medicine Diabetes, Asthma Selection Growth of Delinquency Tuberculosis Drug Dependence Sexually Transmitted Diseases Age Profile of Suicide Mortality in Russia: 1981-2001 Males Females Life Expectancy in Russia Russia Year Males Females China India 1992 1993 1994 1995 2000 2006 2006 2006 62.0 58.9 57.6 58.3 58.8 60.4 72.0 62.0 73.8 71.9 71.2 71.7 71.7 73.2 75.0 64.0