The Geriatric Depression Scale (GDS) is a 30-item self-report assessment used to identify depression in the elderly. The scale was first developed in 1982 by J.A. Yesavage and others.
Contents
Description
The GDS questions are answered "yes" or "no", instead of a five-category response set. This simplicity enables the scale to be used with ill or moderately cognitively impaired individuals. The scale is commonly used as a routine part of a comprehensive geriatric assessment. One point is assigned to each answer and the cumulative score is rated on a scoring grid. The grid sets a range of 0-9 as "normal", 10-19 as "mildly depressed", and 20-30 as "severely depressed".
A diagnosis of clinical depression should not be based on GDS results alone. Although the test has well-established reliability and validity evaluated against other diagnostic criteria, responses should be considered along with results from a comprehensive diagnostic work-up. A short version of the GDS (GDS-SF) containing 15 questions has been developed, and the scale is available in languages other than English. The conducted research found the GDS-SF to be an adequate substitute for the original 30-item scale.
The GDS was validated against Hamilton Rating Scale for Depression (HRS-D) and the Zung Self-Rating Depression Scale (SDS). It was found to have a 92% sensitivity and a 89% specificity when evaluated against diagnostic criteria.
Scale questions and scoring
The scale consists of 30 yes/no questions. Each question is scored as either 0 or 1 points. The following general cutoff may be used to qualify the severity: