Concepts of self-rated health: specifying the gender difference in mortality risk.

PURPOSE

This study addresses the question of how the relation between self-rated health (SRH) and mortality differs between genders. In addition to the general question, four specific concepts of SRH are distinguished: SRH in comparison with age peers, SRH in comparison with one's own health 10 years ago, and current and future health perceptions. For these concepts, the gender-specific risks of mortality were evaluated for a short and a longer follow-up period.

DESIGN AND METHODS

Baseline and mortality data from the Longitudinal Aging Study Amsterdam (N = 1917, initial ages 55-85 years) were used. Mortality risks were evaluated in Cox regression models at 3 and 7.5 years of follow-up, both adjusted for age and for sociodemographic characteristics, indicators of functional and mental health, lifestyle, and social involvement. All SRH measures were scaled from 1 (positive) to 5 (negative).

RESULTS

Baseline correlations between SRH concepts were similar for men and women. After 3 years, 12% of the men and 7% of the women had died; after 7.5 years, these percentages were 27 and 15, respectively. In fully adjusted models, current health perceptions predicted 3-year mortality in men (risk ratio of 1.33). At 7.5 years, mortality in men was predicted by current health perceptions and by SRH compared with age peers (risk ratios of 1.25 and 1.23, respectively). In women, no SRH concept predicted either 3-year or 7.5-year mortality.

IMPLICATIONS

SRH was a predictor of mortality only in men, not in women. The gender difference showed most clearly at longer follow-up, in the SRH concept "comparison with age peers."