[Epidemiologic study of mental disorders of the aged in the urban district of Beijing].
D000368:Aged; D002681:China; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology*; D008875:Middle Aged; D019965:Neurocognitive Disorders / Q000453:epidemiology; D009497:Neurotic Disorders / Q000453:epidemiology; D012494:Sampling Studies; D012559:Schizophrenia / Q000453:epidemiology; D014505:Urban Population