Refusal to participate in a survey of the elderly.
D000367:Age Factors; D000368:Aged; D001007:Anxiety; D001294:Attitude to Health; D003704:Dementia / Q000453:epidemiology; D003863:Depression / Q000453:epidemiology; D005191:Family Characteristics; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D010817:Physician-Patient Relations; D012606:Scotland; D012737:Sex Factors