One generation apart: Individual income and life expectancy in two Swedish cohorts born before and after the expansion of the welfare state.

AIMS: Social inequalities in mortality persist or even increase in high-income countries. Most evidence is based on a period approach to measuring mortality - that is, data from individuals born decades apart. A cohort approach, however, provides complementary insights using data from individuals who grow up and age under similar social and institutional arrangements. This study compares income inequalities in cohort life expectancy in two Swedish cohorts, one born before and one born after the expansion of the welfare state. METHODS: Data on individuals born in Sweden in 1922-1926 and 1951-1955 were obtained from total population registries. These data were linked to individual disposable income from 1970 and 1999 and mortality between 50 and 61 years of age in 1972-1987 and 2001-2016, respectively. We calculated cohort temporary life expectancies in the two cohorts by income and gender. RESULTS: Life expectancy, income, and income inequalities in life expectancy increased between the two cohorts, for both men and women. Women born in 1922-1926 had modest income differences in life expectancy, but pronounced differences emerged in the cohort born in 1951-1955. Men with low incomes born in 1951-1955 had roughly similar life expectancy as those with low incomes born in 1922-1926. CONCLUSIONS: Compared with a period approach to life expectancy trends, the cohort approach highlights the stagnation of mortality at the lowest income groups for men and the rapid emergence of a mortality gradient for women. Future research on health inequalities in welfare states should consider underlying factors both from a cohort and period perspective.

Neurological conditions and subsequent divorce risk in the Nordic countries: the importance of gender and both spouses' education.

BACKGROUND: Prior studies suggest that poor physical health, accompanied by functional disability, is associated with increased divorce risk. However, this association may depend on gender, the socioeconomic resources of the couple, as well as the social policy and social (in)equality context in which the illness is experienced. This study focuses on neurological conditions, which often have substantial functional consequences. METHODS: We used longitudinal population-wide register data from the years 2007-2016 (Denmark, Sweden) or 2008-2017 (Finland, Norway) to follow 2 809 209 married couples aged 30-64 for neurological conditions, identified using information on specialised healthcare for diseases of the nervous system and subsequent divorce. Cox regression models were estimated in each country, and meta-analysis used to calculate across-country estimates. RESULTS: During the 10-year follow-up period, 22.2% of couples experienced neurological conditions and 12.0% of marriages ended in divorce. In all countries, divorce risk was elevated among couples where at least one spouse had a neurological condition, and especially so if both spouses were ill. The divorce risk was either larger or similar for husband's illness, compared with wife's illness, in all educational categories. For the countries pooled, the weighted average HR was 1.21 (95% CI 1.20 to 1.23) for wives' illness, 1.27 (95% CI 1.25 to 1.29) for husbands' illness and 1.38 (95% CI 1.34 to 1.42) for couples where both spouses were ill. CONCLUSIONS: Despite some variation by educational resources and country context, the results suggest that the social consequences of illness are noticeable even in Nordic welfare states, with the husband's illness being at least as important as the wife's.

Inequality and COVID-19 in Sweden: Relative risks of nine bad life events, by four social gradients, in pandemic vs. prepandemic years.

The COVID-19 pandemic struck societies directly and indirectly, not just challenging population health but disrupting many aspects of life. Different effects of the spreading virus-and the measures to fight it-are reported and discussed in different scientific fora, with hard-to-compare methods and metrics from different traditions. While the pandemic struck some groups more than others, it is difficult to assess the comprehensive impact on social inequalities. This paper gauges social inequalities using individual-level administrative data for Sweden's entire population. We describe and analyze the relative risks for different social groups in four dimensions-gender, education, income, and world region of birth-to experience three types of COVID-19 incidence, as well as six additional negative life outcomes that reflect general health, access to medical care, and economic strain. During the pandemic, the overall population faced severe morbidity and mortality from COVID-19 and saw higher all-cause mortality, income losses and unemployment risks, as well as reduced access to medical care. These burdens fell more heavily on individuals with low income or education and on immigrants. Although these vulnerable groups experienced larger absolute risks of suffering the direct and indirect consequences of the pandemic, the relative risks in pandemic years (2020 and 2021) were conspicuously similar to those in prepandemic years (2016 to 2019).

Waves of inequality: income differences in intensive care due to Covid-19 in Sweden.

BACKGROUND: Socioeconomically vulnerable groups were overall more likely to develop severe Covid-19, but specific conditions in terms of preparedness, knowledge and the properties of the virus itself changed during the course of the pandemic. Inequalities in Covid-19 may therefore shift over time. This study examines the relationship between income and intensive care (ICU) episodes due to Covid-19 in Sweden during three distinct waves. METHODS: This study uses Swedish register data on the total adult population and estimates the relative risk (RR) of ICU episodes due to Covid-19 by income quartile for each month between March 2020 and May 2022, and for each wave, using Poisson regression analyses. RESULTS: The first wave had modest income-related inequalities, while the second wave had a clear income gradient, with the lowest income quartile having an increased risk compared to the high-income group [RR: 1.55 (1.36-1.77)]. In the third wave, the overall need for ICU decreased, but RRs increased, particularly in the lowest income quartile [RR: 3.72 (3.50-3.96)]. Inequalities in the third wave were partly explained by differential vaccination coverage by income quartile, although substantial inequalities remained after adjustment for vaccination status [RR: 2.39 (2.20-2.59)]. CONCLUSIONS: The study highlights the importance of considering the changing mechanisms that connect income and health during a novel pandemic. The finding that health inequalities increased as the aetiology of Covid-19 became better understood could be interpreted through the lens of adapted fundamental cause theory.

Migrant mortality by duration of residence and co-ethnic density - A register-based study on Finnish migrants in Sweden with matched controls in the origin and the destination.

Migrant health depends on factors both at the origin and at the destination. Health-related behaviors established before migration may change at the destination. We compare the mortality rates from alcohol- and smoking-related causes and cardiovascular diseases (CVD) of Finnish migrants in Sweden to matched controls in both Sweden and Finland with similar sociodemographic characteristics. Migrant mortality rates from behavioral risk factors lie in-between the rates of non-migrants in the origin and destination. A longer duration of residence is associated with lower mortality and with mortality patterns more similar to Swedes for men. For women, a longer duration of residence is associated with higher mortality, in particular smoking-related mortality, with no tendency of a gradual convergence. The density of Finnish migrants in the local area is modestly associated with mortality. However, CVD mortality tends to be higher and more similar to the level in Finland for migrants in areas with a higher density of Finnish migrants. The results suggest that behavioral changes can reduce mortality differences between migrants and natives and that this can be either beneficial or detrimental to migrant health.

Disruption and selection: the income gradient in mortality among natives and migrants in Sweden.

BACKGROUND: The income gradient in mortality is generated through an interplay between socio-economic processes and health over the life course. International migration entails the displacement of an individual from one context to another and may disrupt these processes. Furthermore, migrants are a selected group that may adopt distinct strategies and face discrimination in the labour market. These factors may have implications for the income gradient in mortality. We investigate whether the income gradient in mortality differs by migrant status and by individual-level factors surrounding the migration event. METHODS: We use administrative register data comprising the total resident population in Sweden aged between 30 and 79 in 2015 (n = 5.7 million) and follow them for mortality during 2015-17. We estimate the income gradient in mortality by migrant status, region of origin, age at migration and country of education using locally estimated scatterplot smoothing and Poisson regression. RESULTS: The income gradient in mortality is less steep among migrants compared with natives. This pattern is driven by lower mortality among migrants at lower levels of income. The gradient is less steep among distant migrants than among close migrants, migrants that arrived as adults compared with children and migrants that received their education in Sweden as opposed to abroad. CONCLUSIONS: Our results are consistent with the notion that income inequalities in mortality are generated through life-course processes that may be disrupted by migration. Data restrictions prevent us from disentangling life-course disruption from selection into migration, discrimination and labour market strategies.

The contribution of alcohol-related deaths to the life-expectancy gap between people with and without depression - a cross-country comparison.

BACKGROUND: Alcohol-related deaths may be among the most important reasons for the shorter life expectancy of people with depression, yet no study has quantified their contribution. We quantify the contribution of alcohol-related deaths to the life-expectancy gap in depression in four European countries with differing levels of alcohol-related mortality. METHODS: We used cohort data linking population registers with health-care and death records from Denmark, Finland, Sweden and Turin, Italy, in 1993-2007 (210,412,097 person years, 3046,754 deaths). We identified psychiatric inpatients with depression from hospital discharge registers in Denmark, Finland, and Sweden and outpatients with antidepressant prescriptions from prescription registers in Finland and Turin. We assessed alcohol-related and non-alcohol-related deaths using both underlying and contributory causes of death, stratified by sex, age and depression status. We quantified the contribution of alcohol-related deaths by cause-of-death decomposition of the life-expectancy gap at age 25 between people with and without depression. RESULTS: The gap in life expectancy was 13.1-18.6 years between people with and without inpatient treatment for depression and 6.7-9.1 years between those with and without antidepressant treatment. The contribution of alcohol-related deaths to the life-expectancy gap was larger in Denmark (33.6%) and Finland (18.1-30.5%) - i.e., countries with high overall alcohol-related mortality - than in Sweden (11.9%) and Turin (3.2%), and larger among men in all countries. The life-expectancy gap due to other than alcohol-related deaths varied little across countries. CONCLUSIONS: Alcohol contributes heavily to the lower life expectancy in depression particularly among men and in countries with high overall alcohol-related mortality.

Pathways from Childhood Economic Conditions to Adult Mortality in a 1953 Stockholm Cohort: The Intermediate Role of Personal Attributes and Socioeconomic Career.

Although both childhood and adult economic conditions have been found to be associated with mortality, independently or in combination with each other, less is known about the role of intermediate factors between these two life stages. This study explores the pathways between childhood economic conditions and adult mortality by taking personal attributes as well as adult socioeconomic career into consideration. Further, we investigate the role of intergenerational income mobility for adult mortality. We used data from a prospective cohort study of individuals that were born in 1953 and residing in Stockholm, Sweden, in 1963 who were followed for mortality between 2002 and 2021 (n = 11,325). We fit Cox proportional hazards models to assess the association of parental income, cognitive ability, social skills, educational attainment, occupational status, and adult income with mortality. The income mobility is operationalized as the interaction between parental and adult income. Our results show that the association between parental income and adult mortality is modest and largely operates through cognitive ability and adult educational attainment. However, our results do not provide support for there being an effect of intergenerational income mobility on adult mortality. In a Swedish cohort who grew up in a comparatively egalitarian society during the 1950s and 1960s, childhood economic conditions were found to play a distinct but relatively small role for later mortality.

Trends in the shape of the income-mortality association in Sweden between 1995 and 2017: a repeated cross-sectional population register study.

OBJECTIVE: We investigate recent trends in income inequalities in mortality and the shape of the association in Sweden. We consider all-cause, preventable and non-preventable mortality for three age groups (30-64, 65-79 and 80+ years). DESIGN AND SETTING: Repeated cross-sectional design using Swedish total population register data. PARTICIPANTS: All persons aged 30 years and older living in Sweden 1995-1996, 2005-2006 and 2016-2017 (n=8 084 620). METHODS: Rate differences and rate ratios for all-cause, preventable and non-preventable mortality were calculated per income decile and age group. RESULTS: From 1995 to 2017, relative inequalities in mortality by income increased in Sweden in the age groups 30-64 years and 65-79 years. Absolute inequalities increased in the age group 65-79 years. Among persons aged 80+ years, inequalities were small. The shape of the income-mortality association was curvilinear in the age group 30-64 years; the gradient was stronger below the fourth percentile. In the age group 65-79 years, the shape shifted from linear in 1995-1996 to a more curvilinear shape in 2016-2017. In the oldest age group (80+ years), varied shapes were observed. Inequalities were more pronounced in preventable mortality compared with non-preventable mortality. Income inequalities in preventable and non-preventable mortality increased at similar rates between 1995 and 2017. CONCLUSIONS: The continued increase of relative (ages 30-79 years) and absolute (ages 65-79 years) mortality inequalities in Sweden should be a primary concern for public health policy. The uniform increase of inequalities in preventable and non-preventable mortality suggests that a more complex explanatory model than only social causation is responsible for increased health inequalities.

Excess Mortality by Individual and Spousal Education for Recent and Long-Term Widowed.

OBJECTIVES: The loss of a spouse is followed by a dramatic but short-lived increase in the mortality risk of the survivor. Contrary to expectations, several studies have found this increase to be larger among those with high education. Having a spouse with high education is associated with lower mortality, which suggests that losing a spouse with high education means the loss of a stronger protective factor than losing a spouse with low education. This may disproportionately affect the high educated because of educational homogamy. METHODS: We use Swedish total population registers to construct an open cohort of 1,842,487 married individuals aged 60-89 during 2007-2016, observing 239,276 transitions into widowhood and 277,946 deaths. We use Poisson regression to estimate relative and absolute mortality risks by own and spousal education among the married and recent and long-term widows. RESULTS: We find an absolute increase in mortality risk, concentrated to the first 6 months of widowhood across all educational strata. The relative increase in mortality risk is larger in higher educational strata. Losing a spouse with high education is associated with higher excess mortality, which attenuates this difference. DISCUSSION: When considering the timing and the absolute level of excess mortality, we find that the overall patterns of excess mortality are similar across educational strata. We argue that widowhood has a dramatic impact on health, regardless of education.

Contributions of specific causes of death by age to the shorter life expectancy in depression: a register-based observational study from Denmark, Finland, Sweden and Italy.

BACKGROUND: The reasons for the shorter life expectancy of people with depression may vary by age. We quantified the contributions of specific causes of death by age to the life-expectancy gap in four European countries. METHODS: Using register-based cohort data, we calculated annual mortality rates in between 1993 and 2007 for psychiatric inpatients with depression identified from hospital-care registers in Denmark, Finland and Sweden, and between 2000 and 2007 for antidepressant-treated outpatients identified from medication registers in Finland and Turin, Italy. We decomposed the life-expectancy gap at age 15 years by age and cause of death. RESULTS: The life-expectancy gap was especially large for psychiatric inpatients (12.1 to 21.0 years) but substantial also for antidepressant-treated outpatients (6.3 to 14.2 years). Among psychiatric inpatients, the gap was largely attributable to unnatural deaths below age 55 years. The overall contribution was largest for suicide in Sweden (43 to 45%) and Finland (37 to 40%). In Denmark, 'other diseases' (25 to 34%) and alcohol-attributable causes (10 to 18%) had especially large contributions. Among antidepressant-treated outpatients, largest contributions were observed for suicide (18% for men) and circulatory deaths (23% for women) in Finland, and cancer deaths in Turin (29 to 36%). Natural deaths were concentrated at ages above 65 years. LIMITATIONS: The indication of antidepressant prescription could not be ascertained from the medication registers. CONCLUSIONS: Interventions should be directed to self-harm and substance use problems among younger psychiatric inpatients and antidepressant-treated young men. Rigorous monitoring and treatment of comorbid somatic conditions and disease risk factors may increase life expectancy for antidepressant-treated outpatients, especially women.

Changes in life expectancy and lifespan variability by income quartiles in four Nordic countries: a study based on nationwide register data.

OBJECTIVES: Levels, trends or changes in socioeconomic mortality differentials are typically described in terms of means, for example, life expectancies, but studies have suggested that there also are systematic social disparities in the dispersion around those means, in other words there are inequalities in lifespan variation. This study investigates changes in income inequalities in mean and distributional measures of mortality in Denmark, Finland, Norway, and Sweden over two decades. DESIGN: Nationwide register-based study. SETTING: The Danish, Finnish, Norwegian and Swedish populations aged 30 years or over in 1997 and 2017. MAIN OUTCOME MEASURES: Income-specific changes in life expectancy, lifespan variation and the contribution of 'early' and 'late' deaths to increasing life expectancy. RESULTS: Increases in life expectancy has taken place in all four countries, but there are systematic differences across income groups. In general, the largest gains in life expectancy were observed in Denmark, and the smallest increase among low-income women in Sweden and Norway. Overall, life expectancy increased and lifespan variation decreased with increasing income level. These differences grew larger over time. In all countries, a marked postponement of early deaths led to a compression of mortality in the top three income quartiles for both genders. This did not occur for the lowest income quartile. CONCLUSION: Increasing life expectancy is typically accompanied by postponement of early deaths and reduction of lifespan inequality in the higher-income groups. However, Nordic welfare societies are challenged by the fact that postponing premature deaths among people in the lowest-income groups is not taking place.

Interdependent pathways between socioeconomic position and health: A Swedish longitudinal register-based study.

Health inequalities are generated by the conditions in which people are born, grow, live, work and age. From a life-course perspective, these conditions are formed by complex causal relationships with mutual and intertwined paths between socioeconomic position and health. This study attempts to disentangle some of these processes by examining pathways between socioeconomic position and health across the life-course. We used yearly Swedish national register data with information from over 31 years for two cohorts born 1941-1945 and 1961-1965. We analyzed associations between several indicators of childhood and adult socioeconomic position and health, measured by number of in-patient hospitalizations. We estimated within- and between-person associations using random intercept cross-lagged panel models. The results showed bi-directional associations between socioeconomic position and health that varied in strength across the life-course. Age variations in the associations were primarily observed when individuals aged into or out of age-stratified institutions. In ages where transitions from education to the labor market are common, the associations from health to income and education were strong. Around and after retirement age, the between-person association from health to income was weak, while the association from income to health strengthened. Within-person estimates showed no association between income and subsequent hospitalization among older persons, indicating no direct causal effect of income change on health in this age group. For persons of middle age, the associations were of similar strength in both directions and present at both the between- and within-person level. Our findings highlight the importance of theoretical frameworks and methods that can incorporate the interplay between social, economic, and biological processes over the life-course in order to understand how health inequalities are generated.

Home and away: mortality among Finnish-born migrants in Sweden compared to native Swedes and Finns residing in Finland.

BACKGROUND: Most first-generation migrants have lower mortality compared to the native population. Finnish-born migrants in Sweden instead have higher mortality; possibly because of health behaviours established before migration. To increase our understanding of this excess mortality, we compared the cause-specific mortality of Finnish migrants in Sweden to both the native population of Sweden and the native Finnish population residing in Finland. METHODS: We used Swedish and Finnish register data, applying propensity score matching techniques to account for differences in sociodemographic characteristics between the migrants, Swedes and Finns. The index population were Finnish migrants aged 40-60, residing in Sweden in 1995. We compared patterns of all-cause, alcohol- and smoking-related, and cardiovascular disease mortality across the groups in the period 1996-2007. RESULTS: Finnish migrant men in Sweden had lower all-cause mortality compared to Finnish men but higher mortality compared to the Swedish men. The same patterns were observed for alcohol-related, smoking-related and cardiovascular disease mortality. Among women, all three groups had similar levels of all-cause mortality. However, Finnish migrant women had higher alcohol-related mortality than Swedish women, similar to Finnish women. Conversely, migrant women had similar levels of smoking-related mortality to Swedish women, lower than Finnish women. CONCLUSIONS: Finnish-born migrants residing in Sweden have mortality patterns that are typically in between the mortality patterns of the native populations in their country of origin and destination. Both the country of origin and destination need to be considered in order to better understand migrant health.

Exploring the longevity advantage of doctorates in Finland and Sweden: The role of smoking- and alcohol-related causes of death.

AIMS: Tobacco smoking and alcohol use contribute to differences in life expectancy between individuals with primary, secondary and tertiary education. Less is known about the contribution of these risk factors to differences at higher levels of education. We estimate the contribution of smoking and alcohol use to the life-expectancy differences between the doctorates and the other tertiary-educated groups in Finland and in Sweden. METHODS: We used total population data from Finland and Sweden from 2011 to 2015 to calculate period life expectancies at 40 years of age. We present the results by sex and educational attainment, the latter categorised as doctorate or licentiate degrees, or other tertiary. We also present an age and cause of death decomposition to assess the contribution of deaths related to smoking and alcohol. RESULTS: In Finland, deaths related to smoking and alcohol constituted 48.6% of the 2.1-year difference in life expectancy between men with doctorate degrees and the other tertiary-educated men, and 22.9% of the 2.1-year difference between women, respectively. In Sweden, these causes account for 22.2% of the 1.9-year difference among men, and 55.7% of the 1.6-year difference among women, which in the latter case is mainly due to smoking. Conclusions: Individuals with doctorates tend to live longer than other tertiary-educated individuals. This difference can be partly attributed to alcohol consumption and smoking.

The contribution of smoking-related deaths to the gender gap in life expectancy in Sweden between 1997 and 2016.

Aims: In recent decades, smoking-related mortality has declined among men and increased among women in Sweden. We estimate the contribution of smoking-related deaths to the narrowing of the gender gap in life expectancy in Sweden between 1997 and 2016. Methods: We extracted population data on deaths and population under risk on the entire Swedish population aged 25 years and over for the period 1997-2016. Smoking-related mortality was assessed using an indirect method based on lung cancer mortality. We then estimated the contribution of smoking to the gender gap in life expectancy by comparing the observed life expectancies to life expectancies excluding smoking-related deaths. Results: The gender gap in life expectancy was 5.0 years in 1997 and 3.4 years in 2016. The gender gap narrowed by 1.6 years, of which 0.6 years were attributable to smoking-related deaths. Conclusions: The combination of decreasing smoking-related mortality among men and increasing smoking-related mortality among women in Sweden accounted for almost 40% of the narrowing of the gender gap in life expectancy during the period 1997-2016.

A gold mine, but still no Klondike: Nordic register data in health inequalities research.

Aims: Future research on health inequality relies on data that cover life-course exposure, different birth cohorts and variation in policy contexts. Nordic register data have long been celebrated as a 'gold mine' for research, and fulfil many of these criteria. However, access to and use of such data are hampered by a number of hurdles and bottlenecks. We present and discuss the experiences of an ongoing Nordic consortium from the process of acquiring register data on socio-economic conditions and health in Denmark, Finland, Norway and Sweden. Methods: We compare experiences of data-acquisition processes from a researcher's perspective in the four countries and discuss the comparability of register data and the modes of collaboration available to researchers, given the prevailing ethical and legal restrictions. Results: The application processes we experienced were time-consuming, and decision structures were often fragmented. We found substantial variation between the countries in terms of processing times, costs and the administrative burden of the researcher. Concerned agencies differed in policy and practice which influenced both how and when data were delivered. These discrepancies present a challenge to comparative research. Conclusions: We conclude that there are few signs of harmonisation, as called for by previous policy documents and research papers. Ethical vetting needs to be centralised both within and between countries in order to improve data access. Institutional factors that seem to facilitate access to register data at the national level include single storage environments for health and social data, simplified ethical vetting and user guidance.

Contribution of smoking and alcohol consumption to income differences in life expectancy: evidence using Danish, Finnish, Norwegian and Swedish register data.

BACKGROUND: Despite being comparatively egalitarian welfare states, the Nordic countries have not been successful in reducing health inequalities. Previous studies have suggested that smoking and alcohol contribute to this pattern. Few studies have focused on variations in alcohol-related and smoking-related mortality within the Nordic countries. We assess the contribution of smoking and alcohol to differences in life expectancy between countries and between income quintiles within countries. METHODS: We collected data from registers in Denmark, Finland, Norway and Sweden comprising men and women aged 25-79 years during 1995-2007. Estimations of alcohol-related mortality were based on underlying and contributory causes of death on individual death certificates, and smoking-related mortality was based on an indirect method that used lung cancer mortality as an indicator for the population-level impact of smoking on mortality. RESULTS: About 40%-70% of the between-country differences in life expectancy in the Nordic countries can be attributed to smoking and alcohol. Alcohol-related and smoking-related mortality also made substantial contributions to income differences in life expectancy within countries. The magnitude of the contributions were about 30% in Norway, Sweden and among Finnish women to around 50% among Finnish men and in Denmark. CONCLUSIONS: Smoking and alcohol consumption make substantial contributions to both between-country differences in mortality among the Nordic countries and within-country differences in mortality by income. The size of these contributions vary by country and sex.

Is the Association Between Late Life Morbidity and Disability Attenuated Over Time? Exploring the Dynamic Equilibrium of Morbidity Hypothesis.

OBJECTIVE: There is evidence suggesting that the prevalence of disability in late life has declined over time while the prevalence of chronic diseases has increased. The dynamic equilibrium of morbidity hypothesis suggests that these patterns are due to the attenuation of the morbidity-disability link over time. This study aimed to test this assumption empirically. METHODS: Data were drawn from three repeated cross-sections of SWEOLD, a nationally representative survey of the Swedish population aged 77 years and older. Poisson regression models were fitted to assess the trends in the prevalence of Activities of Daily Living (ADL) disability, Instrumental ADL (IADL) disability, and selected groups of chronic conditions. The changes in the associations between chronic conditions and disabilities were examined on both multiplicative and additive scales. RESULTS: Between 1992 and 2011, the prevalence of both ADL and IADL disabilities decreased whereas the prevalence of nearly all chronic morbidities increased. Significant attenuations of the morbidity-disability associations were found for cardiovascular diseases, metabolic disorders, poor lung function, and psychological distress. DISCUSSION: In agreement with the dynamic equilibrium of morbidity hypothesis, this study concludes that the morbidity-disability associations among the Swedish older adults largely waned between 1992 and 2011.

Educational inequalities in mortality are larger at low levels of income: A register-based study on premature mortality among 2.3 million Swedes, 2006-2009.

Education develops skills that help individuals use available material resources more efficiently. When material resources are scarce, each decision becomes comparatively more important. Education may also protect from health-related income decline, since the highly educated tend to work in occupations with lower physical demands. Educational inequalities in health may, therefore, be more pronounced at lower levels of income. The aim of this study is to assess whether the shape of the income gradient in premature mortality depends on the level of education. Total population data on education, income and mortality was obtained by linking several Swedish registers. Income was defined as five-year average disposable household income for ages 35-64 and mortality follow-up covered the period 2006-2009. The final population comprised 2.3 million individuals, 6.2 million person-years and 14,362 deaths. Income was modeled using splines in order to allow variation in the functional form of the association across educational categories. Poisson regression with robust standard errors was used. The curvilinear shape of the association between income and mortality was more pronounced among those with a low education. Both absolute and relative educational inequalities in premature mortality tended to be larger at low levels of income. The greatest income differences in mortality were observed for those with a low education and the smallest for the highly educated. Education and income interact as predictors of mortality. Education is a more important factor for health when access to material resources is limited.