An investigation of nonresponse to self-assessment of health by older persons. Associations with mortality.

Abstract

This study examined the association between mortality and nonresponse to questions about health status (both refusals and "don't know" responses) using a national sample of persons aged 70 and over. Data were drawn from the 1984-1990 Longitudinal Study of Aging. Three time points of vital status were used as the outcome indicators (1984-1986, 1984-1988, 1984-1990). Five self-assessment questions were examined; three of the five questions had bivariate odds ratios that indicated significant associations between a nonresponse and all three mortality indexes. Results of the study suggest that nonresponses by older persons can convey meaningful information. Research on self-assessments of health in later life should not routinely exclude nonresponses as missing data, even if they are an infrequent response.