Epidemiology and the challenge of ageing.
D000203:Activities of Daily Living; D000368:Aged; D000375:Aging; D004813:Epidemiology; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D008017:Life Expectancy; D008297:Male; D009017:Morbidity; D009026:Mortality; D011158:Population Growth; D012744:Sex Ratio