Self-Rated Health and its Impact on Survival of Older Adults.

Abstract

Background: Self -rated health (SRH) is a subjective assessment of health status that results from asking a question as "How do you assess your health?". The aim of this study was to determine the value of SRH for survival of older adults.

Materials and methods: This cohort study was conducted among a population aged 60 years and over living in the north region of Iran. The participants' characteristics including demographic information, life-style behaviors, medical history, body mass index, depressive symptoms, cognitive function, and social support were examined. SRH was categorized into two groups (1. poor or fair and 2. good or excellent). All of the study population were followed up again after 5 years to determine the survival condition.

Results: Totally, 1475 elderly people were included. Good or excellent SRH showed a significant association with male gender, to be married, higher physical activity, less co-morbid chronic disorders, no depressive symptoms, normal cognitive function, higher social support, smoking (P < 0.001), and normal body mass index (BMI) (P = 0.021); however, no significant association with age (P < 0.083) was observed. Out of 944 elderly people expressing good or excellent SRH, 85 (9%) persons died after 5-year follow-up (P < 0.001). Cox regression analysis revealed that SRH had a significant impact on mortality of older adults (adjusted hazard ratio = 1.447; 95% confidence interval: 1.008-2.076; P = 0.045).

Conclusion: Considering health-related characteristics including age, gender, number of drugs the participant was taking, physical activity, BMI, and social support, SRH showed a significant effect on 5-year survival of older adults.