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Featured Article Original Investigation
Elizabeth M. Badley
Anthony V. Perruccio
Monique A.M. Gignac
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Context: Baby boomers are commonly believed to be healthier than the previous generation. Using self-rated health (SRH) as an indicator of health status, this study examines the effects of age, period, and birth cohort on the trajectory of health across 4 generations: World War II (born between 1935 and 1944), older baby boomers (born between 1945 and 1954), younger baby boomers (born between 1955 and 1964), and Generation X (born between 1965 and 1974).
Methods: We analyzed Canada’s longitudinal National Population Health Survey 1994-2010 (n = 8,570 at baseline), using multilevel growth models to estimate the age trajectory of SRH by cohort, accounting for period and incorporating the influence of changes in education, household income, smoking status, and body mass index (BMI) on SRH over time.
Findings: SRH worsened with increasing age in all cohorts. Cohort differences in SRH were modest (p = 0.034), but there was a significant period effect (p = 0.002).We found marked cohort effects for increasing education, income, and BMI, and decreasing smoking from the youngest to the oldest cohorts, which were much reduced (education and smoking) or removed (income and BMI) once period was taken into account. At the population level, multivariable analysis showed the benefits of increasing education and income and declines in smoking on the trajectory of improving SRH were almost counterbalanced by the effects of increasing BMI (obesity).
Conclusions: We found no evidence to support the expectation that baby boomers will age more or less healthily than previous cohorts did. We also found that increasing BMI has likely undermined improvements in health that might have otherwise occurred, with possible implications for the need for health care. Period effects had a more profound effect than birth cohort effects. This suggests that interventions to improve health, such as reducing obesity, can be targeted to the entire, or a major portion of the, population and need not single out particular birth cohorts.
Author(s): Elizabeth M. Badley, Mayilee Canizares, Anthony V. Perruccio, Sheilah Hogg-Johnson, and Monique A.M. Gignac
Keywords: self-rated health, age-period-cohort, socioeconomic status, obesity
Read on Wiley Online Library
Volume 93, Issue 1 (pages 40–72) DOI: 10.1111/1468-0009.12105 Published in 2015
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The Milbank Quarterly’s multidisciplinary approach and commitment to applying the best empirical research to practical policymaking offers in-depth assessments of the social, economic, political, historical, legal, and ethical dimensions of health and health care policy.