NCIt definition : A standardized rating scale developed by Yesavage et al in 1983, which is a self-report
assessment used to identify depression in older adults. The questionnaire contains
30 items. All questions are answered 'yes' or 'no'.;
Alternative definition : CDISC: Geriatric Depression Scale (GDS) (Yesavage JA, Brink TL, Rose TL, et al. Development
and validation of a geriatric depression screening scale: a preliminary report. J
Psychiatry Res. 1983;17(1):37-49).;