Mortality in adult immigrants in the 2000s in Belgium: a test of the 'healthy-migrant' and the 'migration-as-rapid-health-transition' hypotheses.

OBJECTIVE: Firstly, to map out and compare all-cause and cause-specific mortality patterns by migrant background in Belgium; and secondly, to probe into explanations for the observed patterns, more specifically into the healthy-migrant, acculturation and the migration-as-rapid-health-transition theories. METHODS: Data comprise individually linked Belgian census-mortality follow-up data for the period 2001-2011. All official inhabitants aged 25-54 at time of the census were included. To delve into the different explanations, differences in all-cause and chronic- and infectious-disease mortality were estimated using Poisson regression models, adjusted for age, socioeconomic position and urbanicity. RESULTS: First-generation immigrants have lower all-cause and chronic-disease mortality than the host population. This mortality advantage wears off with length of stay and is more marked among non-Western than Western first-generation immigrants. For example, Western and non-Western male immigrants residing 10 years or more in Belgium have a mortality rate ratio for cardiovascular disease of 0.72 (95% CI 0.66-0.78) and 0.59 (95% CI 0.53-0.66), respectively (vs host population). The pattern of infectious-disease mortality in migrants is slightly different, with rather high mortality rates in first-generation sub-Saharan Africans and rather low rates in all other immigrant groups. As for second-generation immigrants, the picture is gloomier, with a mortality disadvantage that disappears after control for socioeconomic position. CONCLUSION: Findings are largely consistent with the healthy-migrant, acculturation and the migration-as-rapid-health-transition theories. The convergence of the mortality profile of second-generation immigrants towards that of the host population with similar socioeconomic position indicates the need for policies simultaneously addressing different areas of deprivation.

Health status and mortality rates of adolescents and young adults in the Brussels-Capital Region: differences according to region of origin and migration history.

OBJECTIVE: To examine and quantify differences in both self-rated health (SRH) and mortality according to region of origin, migration history and educational level among adolescents and young adults living in the Brussels-Capital Region (BCR). DESIGN: The data consist of the census of 2001 for the BCR linked to death and emigration records for the period of 01/10/2001-01/01/2006. Belgian, Maghreb, Turkish and sub-Saharan African 15-34 year olds are included in the analyses. Odds ratios are calculated for SRH (0 = poor health, 1 = good health) using logistic regression. Age-standardised mortality rates are computed and mortality rate ratios are shown using Poisson regression. RESULTS: There are marked health differences according to region of origin. While Maghrebins and Turks (M/T) feel less healthy, sub-Saharan Africans (SSA) feel healthier than Belgians. Furthermore, there are important differences within nationality groups, with second-generation M/T having a worse health status than the first generation. While first-generation SSA feel a lot healthier than Belgians, there is no difference between second-generation SSA and Belgians. Education plays a marked role in health and mortality differences, especially in young adulthood (25-34 years). Migration history is even more important than region of origin concerning mortality differences. First-generation M/T show lower mortality risks compared to Belgians and second-generation M/T, while the latter show comparable mortality risks as Belgians after controlling for education. CONCLUSION: Important differences are observed according to both region of origin and migration history among adolescents and young adults in the BCR. These differences significantly reduce when accounting for education, suggesting that investing in education is a public-health strategy worth considering. Further research in this area may benefit from taking migration history into account.

Educational Inequalities in the Transition to Adulthood in Belgium: The Impact of Intergenerational Mobility on Young-Adult Mortality in 2001-2009.

Several studies have focused on the association between parental and personal socioeconomic position (SEP) and health, with mixed results depending on the specific health outcome, research methodology and population under study. In the last decades, a growing interest is given to the influence of intergenerational mobility on several health outcomes at young ages. This study addresses the following research question: Is educational intergenerational mobility associated with all-cause and cause-specific mortality in young adulthood? To this end, the Belgian 1991 and 2001 censuses are used, providing characteristics of young persons at two time points (T1 = 01/03/91;T2 = 01/10/01) and follow-up information on mortality and emigration between T2 and 31/12/09 (T3). The study population consists of all official inhabitants of Flanders and the Brussels-Capital Region at T2, born between 1972 and 1982 and alive at T2. Parental and personal education are divided into primary (PE), lower secondary (LSE), higher secondary (HSE) and higher education (HE). We analyse mortality between T2 and T3 calculating age-standardised mortality rates (ASMRs) and using Cox regression (hazard ratios = HR). Personal rather than parental education determines the observed mortality rates, with high all-cause mortality rates among those with PE, irrespective of parental education (e.g., among men ASMRPE-PE = 200.0 [95% CI 158.0-241.9]; ASMRHE-PE = 319.7 [183.2-456.3]) and low all-cause mortality among those in higher education, regardless of parental education (ASMRPE-HE = 41.7 [30.8-52.6]; ASMRHE-HE = 38.0 [33.2-42.8]). There is some variation by gender and according to cause of death. This study shows the strong association between personal education and young-adult mortality.

Educational inequalities in young-adult mortality between the 1990s and the 2000s: regional differences in Belgium.

BACKGROUND: This study addresses educational inequalities in young-adult mortality between the 1990s and the 2000s by comparing trends in the three different regions in Belgium stratified by sex. Social inequalities in mortality are of major concern to public health but are rarely studied at young ages. Substantial health differences have been found between the Flemish (FR) and Walloon region (WR) concerning (healthy) life expectancy and avoidable mortality, but little is known about regional differentials in young-adult mortality, and comparisons with the Brussels-Capital Region (BCR) have thus far never been made. METHODS: Data are derived from record linkage between the Belgian censuses of 1991 and 2001 and register data on death and emigration for the periods 01/03/1991-01/03/1999 and 01/10/2001-01/10/2009. Analyses are restricted to young adults aged 25 to 34 years at the moment of each of the censuses. Absolute (directly standardized mortality rates (ASMRs)) and relative (mortality rate ratio using Poisson regression) measures were calculated. RESULTS: There is a significant drop in young-adult mortality between the 1990s and the 2000s in all regions and both sexes, with the strongest decline in the BCR (e.g. ASMR of men declined from 165.6 [151.1-180.1] per 100,000 person years to 73.8 [88.3-98.3]). The mortality rates remain highest in the WR in the 2000s Between the 1990s and the 2000s, a remarkable change in the educational distribution occurred as well, with much lower proportions of primary educated in all regions in the 2000s in favour of higher proportions in all other educational levels, especially in higher education. All educational groups show lower mortality over time, except for lower educated men in the FR. CONCLUSIONS: There is a positive evolution towards lower mortality among the young-adult Belgian population. The WR trails behind in this evolution, which calls for tailored preventive actions. Educational inequalities are marked in all regions and time periods. A more general discussion is needed on the responsibility of society in rendering support and capability to enhance the state of well-being of those not able to achieve a high social position.

Trends in young-adult mortality between the 1990s and the 2000s in urban and non-urban areas in Belgium: the role of a changing educational composition in overall mortality decline.

This study probes into the evolution in young-adult mortality according to urbanisation degree in Belgium and moves beyond mere description through decomposing mortality trends into changes in educational distribution and in overall mortality. As most of young-adult deaths are preventable and an enormous cost and loss to society, this study addresses a highly relevant public-health topic. Individual record-linked data between the Belgian censuses of 1991 and 2001 and register data on death and emigrations are used. Age-standardized mortality rates (ASMR), directly standardized to the European Population of 2013 are calculated with 95% confidence intervals (CI), as well as a decomposition measure to pinpoint the proportion mortality change attributable to differences in educational composition over time. The young-adult population consists of 2,458,637 19-34 year-olds in 1991, with 11,898 deaths in a five-year period, and is slightly smaller in 2001 with 2,174,368 young adults and 8138 deaths. Overall, there is a positive evolution towards lower young-adult mortality, with the strongest declines in men living in large urban areas (ASMR from 149.0 [CI 142.1-155.8] in 1991-1996 to 94.6 [88.9-100.3] in 2001-2006). Decomposition analysis shows that the decrease in male mortality in non-urban areas over time is largely due to changes in the educational composition, while mortality in urban areas mainly decreases because of a decline in overall mortality. In urban areas all educational groups have benefitted over time. This clearly demonstrates that living and growing up in an urban area does not always have to imply a health penalty, but can have health advantages as well.

Evolution of educational inequalities in mortality among young adults in an urban setting.

OBJECTIVES: To gain insight into the evolution in educational inequalities in adolescent and young adult all-cause and cause-specific mortality in the urban setting of the Brussels-Capital Region. METHODS: Data were derived from record linkage between the censuses of 1991 and 2001 and register data on all-cause and cause-specific mortality and emigration in the respective periods of 1st October 1991 to 1st January 1996 and 1st October 2001 to 1st January 2006. Both directly and indirectly standardised mortality rates and the relative index of inequality (RII) were computed. RESULTS: Mortality rates among adolescents and young adults have dropped significantly, especially infections and traffic accidents. However, educational inequalities among men have slightly increased: men with a maximum primary education are four times more likely to die than those who are higher educated [RII = 4.09 (2.78-6.03)]. Among women, no social gradient is observed in either period, but a clear split between the lowest educated and other educational groups is apparent in the 2000s. CONCLUSIONS: There is a positive evolution towards lower mortality among adolescents and young adults, but educational inequalities remain a public health concern.

Household-based socioeconomic position and diabetes-related mortality among married and cohabiting persons: findings from a census-based cohort study (Flanders, 2001-2010).

BACKGROUND: Diabetes prevalence is high worldwide, affecting entire populations. Yet some population groups are more susceptible than others. In contemporary western societies, socioeconomically disadvantaged groups are disproportionally affected. The pattern is less clear for diabetes mortality. Researchers argue increasingly in favour of looking beyond individual socioeconomic position (SEP). In light of the above, this paper looks at the relationship between individual-based and household-based SEP measures and diabetes mortality. METHODS: Data consisted of the Belgian 2001 census for the Flanders region linked to register data on cause-specific mortality during the period 2001-2010. The study population included all 35-year-old to 74-year-old official inhabitants of Flanders married or cohabiting at the 2001 census. Age-standardised death rates (direct standardisation) and mortality rate ratios (MRRs; Poisson regression) were computed for the different SEP groups. RESULTS: Inverse gradients were observed by own education, partner's education and housing status (combination of housing tenure and quality). For example, among 55-year-olds to 74-year-olds, MRRs according to partner's education were 3.0 (95% CI 2.4 to 3.8) for women with a lower-educated partner and 1.6 (95% CI 1.2 to 2.0) for women with a higher secondary-educated partner, relative to women with a higher-educated partner. As for housing status, diabetes-related mortality was particularly high among tenants and low-quality owners. The association between each of the SEP measures and diabetes-related mortality remained after adjusting for the other measures. CONCLUSIONS: There were large differences in diabetes-related mortality according to both individual-based and household-based SEP measures, indicating the importance of the individual and household levels for understanding socioeconomic inequalities in diabetes mortality.