Subjective Successful Aging Predicts Probability of Mortality Over 9 Years Among Adults Aged 50-74.

Abstract

Background and objectives: Although the relationship between mortality and objective successful aging (health, functional ability, social engagement) is clear, the relationship between subjective successful aging (SSA) and mortality is inconclusive. Building on the broader literature regarding psychological well-being, these analyses examine the relationship between SSA and mortality, adjusting for demographic, health, and lifestyle characteristics with known mortality risks.

Research design and methods: We analyzed self-report data collected between 2006 and 2008 from 5,483 people. In addition to demographic, health, and lifestyle variables, we measured SSA using a valid, reliable measure. Over the course of 3,285 days, 695 people died. We computed 4 sequential Cox proportional hazard models to examine the association between SSA and time to death. The first model included only SSA; Model 2 added demographic characteristics; Model 3 added health characteristics; Model 4 added lifestyle characteristics.

Results: We found that SSA had a significant association with mortality, accounting for known mortality risk factors. Each 1-point rise in SSA decreased the risk of mortality by 3% (0.97; 95% confidence interval = 0.95-0.99; p < .05). The probability of death within 9 years for persons with SSA scores from 0 to 5 was 45%; for persons with SSA scores from 25 to 30, risk of mortality was less than 10%.

Discussion and implications: Findings provide evidence that lower SSA scores reveal greater risk for mortality beyond demographic, health, and lifestyle variables. A brief assessment of SSA can provide unique clinical information and be used to identify people who might benefit from interventions to reduce mortality risk.