A mail inquiry into pensioner's living conditins. Comparison between response group and non-response group.
D000203:Activities of Daily Living; D000367:Age Factors; D000368:Aged; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D012179:Retirement; D012737:Sex Factors; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires