PT - JOURNAL ARTICLE AU - Nancy A Ross AU - Rochelle Garner AU - Julie Bernier AU - David H Feeny AU - Mark S Kaplan AU - Bentson McFarland AU - Heather M Orpana AU - Jillian Oderkirk TI - Trajectories of health-related quality of life by socio-economic status in a nationally representative Canadian cohort AID - 10.1136/jech.2010.115378 DP - 2012 Jul 01 TA - Journal of Epidemiology and Community Health PG - 593--598 VI - 66 IP - 7 4099 - http://jech.bmj.com/content/66/7/593.short 4100 - http://jech.bmj.com/content/66/7/593.full SO - J Epidemiol Community Health2012 Jul 01; 66 AB - Background Mortality and morbidity have been shown to follow a ‘social gradient’ in Canada and many other countries around the world. Comparatively little, however, is known about whether ageing amplifies, diminishes or sustains socio-economic inequalities in health.Methods Growth curve analysis of seven cycles of the Canadian National Population Health Survey (n=13 682) for adults aged 20 and older at baseline (1994/95). The outcome of interest is the Health Utilities Index Mark 3, a measure of health-related quality of life (HRQL). Models include the deceased so as not to present overly optimistic HRQL values. Socio-economic position is measured separately by household-size-adjusted income and highest level of education attained.Results HRQL is consistently highest for the most affluent and the most highly educated men and women, and is lower, in turn, for middle and lower income and education groups. HRQL declines with age for both men and women. The rate of the decline in HRQL, however, was related neither to income nor to education for men, suggesting stability in the social gradient in HRQL over time for men. There was a sharper decline in HRQL for upper-middle and highest-income groups for women than for the poorest women.Conclusion HRQL is graded by both income and education in Canadian men and women. The grading of HRQL by social position appears to be ‘set’ in early adulthood and is stable through mid- and later life.