Method of sampling in a study of older people with a comparison of respondents and non-respondents.
D000367:Age Factors; D000368:Aged; D001168:Arthritis / Q000453:epidemiology; D001991:Bronchitis / Q000453:epidemiology; D005194:Family Practice; D005260:Female; D005853:Geriatrics; D006760:Hospitalization; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D012494:Sampling Studies; D012737:Sex Factors; D014552:Urinary Tract Infections / Q000453:epidemiology; D014652:Vascular Diseases / Q000453:epidemiology