A mental model of factors associated with subjective life expectancy
The objective was to develop and test a framework based on a biopsychosocial model that can be used to identify factors associated with subjective (self-estimated) life expectancy (SLE). SLE predicts important work and retirement decisions so a better understanding of the factors that contribute to an individual's thoughts about their likely age at death is essential for late-career and financial planning and for developing interventions aimed at addressing inappropriate estimates. This is a sub-study of the Australian 45 and Up Study cohort. Survey data were collected at two time points (3 years apart) from 2579 participants aged over 55 years. Correlations and regression analyses tested the relationship of SLE with biomedical/genetic factors (age, health diagnoses, parental longevity), socioeconomic factors (income, education) health behaviors (exercise, smoking, alcohol use, diet), and psychosocial factors (optimism, distress, social connectedness). Variables within each set of factors except the socioeconomic set were significantly related to SLE. Healthy lifestyle behaviors significantly moderated the effect of parental longevity. The findings indicate that individuals construct an understanding of their personal life expectancy based on similar factors that predict actual life expectancy, but not all mortality risk factors appear to be weighted realistically. The findings imply that, at least to some extent, SLE is not a stable construct and might be amenable to intervention.
Volume (Year): 82 (2013)
Issue (Month): C ()
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