The Geriatric Depression Scale (GDS).
Kurlowicz
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D000368:Aged; D003863:Depression / Q000145:classification* / Q000175:diagnosis*; D015577:Geriatric Assessment; D006801:Humans; D011569:Psychiatric Status Rating Scales / Q000592:standards*; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires