Development and validation of a geriatric depression screening scale: a preliminary report

Area of Science:

• Gerontology
• Psychiatry
• Clinical Psychology

Background:

• Depression is a significant health concern in the elderly population.
• Accurate and reliable screening tools are crucial for timely diagnosis and intervention.
• Existing scales may have limitations in geriatric populations.

Purpose of the Study:

• To develop and validate a new Geriatric Depression Scale (GDS) specifically for elderly individuals.
• To compare the GDS with established depression rating scales: Hamilton Rating Scale for Depression (HRS-D) and Zung Self-Rating Depression Scale (SDS).

Main Methods:

• A 100-item questionnaire was administered to normal and depressed elderly subjects.
• 30 highly correlated items were selected to form the GDS.
• The GDS, HRS-D, and SDS were administered to new groups of elderly subjects classified by Research Diagnostic Criteria (RDC).
• Internal consistency and correlation with RDC symptoms were assessed for each scale.

Main Results:

• All scales (GDS, HRS-D, SDS) demonstrated internal consistency.
• The GDS and HRS-D showed significantly stronger correlations with RDC depression symptoms compared to the SDS.
• The GDS proved to be a reliable and valid measure.

Conclusions:

• The Geriatric Depression Scale (GDS) is a reliable and valid self-rating screening tool for depression in elderly populations.
• The GDS demonstrates superior performance compared to the SDS in correlating with diagnostic symptoms.
• This scale offers a valuable instrument for geriatric mental health assessment.