20-Year Trajectories of Health in Midlife and Old Age: Contrasting the Impact of Personality and Attitudes Toward Own Aging

摘要

Personality traits affect health throughout adulthood. Recent research has demonstrated that attitudes toward own aging (ATOA) also play an important role in various health outcomes. To date, the role of personality versus ATOA for health has rarely been considered in parallel and contrasted for different periods of the second half of life, such as midlife versus early old age. We posit that with advancing age, associations of personality and ATOA with trajectories of health might change. To address this assumption, we examined trajectories of physician-rated health and its between-person and time-varying, within-person associations with personality (neuroticism and conscientiousness) and ATOA over 20 years in middle-aged (baseline age 43-46 years; n = 502) and older (61-65 years; n = 500) adults. Based on longitudinal multilevel regression models (controlling for gender and education), we found at the between-person level that lower neuroticism scores and more positive ATOA scores were independently associated with better physician-rated health at baseline. This association of ATOA with health was stronger in the old age sample than in the midlife sample. At the within-person level, time-varying associations revealed that both middle-aged and older individuals had better physician-rated health on measurement occasions when they reported more favorable ATOA. In addition, in the old age subsample alone, individuals' physician-rated health was better on occasions when they had higher conscientiousness scores. Our findings suggest that certain personality traits (conscientiousness, but not neuroticism) as well as attitudes toward own aging may gain in importance in later life as predictors of objective health changes.