Criterion Validity of the 15-item Geriatric Depression Scale in the Austrian Population

Abstract

The "Geriatric Depression Scale" consisting of 15 items (GDS-15) is a well-known screening tool for depression among the elderly. Until now the criterion validity of the German language GDS-15 was not investigated in a sample of the adult general population. 504 persons of the Austrian general population completed the GDS-15. Using the Schedules for Clinical Assessment in Neuropsychiatry (SCAN) ICD-10 diagnoses were established. Receiver Operating Characteristics (ROC) analysis was conducted. Possible gender and age differences were explored. The overall discrimination of the GDS-15 was sufficient (ROC-AUC 0,851). The cut-off value developed on the basis of our sample was 2/3 with a sensitivity of 71.8 % und a specificity of 82.8 %. We could not find significant gender or age group differences. This is the first study investigating the criterion validity of the German language GDS-15 in the adult general population. The sensitivity and specificity are sufficient and comparable with the findings among other screening tools.