Validity of the geriatric depression scale and the collateral source version of the geriatric depression scale in nursing homes

Li, Zhicheng, Jeon, Yun-Hee, Low, Lee-Fay, Chenoweth, Lynn, O’Connor, Daniel W., Beattie, Elizabeth, & Brodaty, Henry (2015) Validity of the geriatric depression scale and the collateral source version of the geriatric depression scale in nursing homes. International Psychogeriatrics, 27(9), pp. 1495-1504.

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Abstract

Background

Depression is a common psychiatric disorder in older people. The study aimed to examine the screening accuracy of the Geriatric Depression Scale (GDS) and the Collateral Source version of the Geriatric Depression Scale (CS-GDS) in the nursing home setting.

Methods

Eighty-eight residents from 14 nursing homes were assessed for depression using the GDS and the CS-GDS, and validated against clinician diagnosed depression using the Semi-structured Clinical Diagnostic Interview for DSM-IV-TR Axis I Disorders (SCID) for residents without dementia and the Provisional Diagnostic Criteria for Depression in Alzheimer Disease (PDCdAD) for those with dementia. The screening performances of five versions of the GDS (30-, 15-, 10-, 8-, and 4-item) and two versions of the CS-GDS (30- and 15-item) were analyzed using receiver operating characteristic (ROC) curves.

Results

Among residents without dementia, both the self-rated (AUC = 0.75–0.79) and proxy-rated (AUC = 0.67) GDS variations performed significantly better than chance in screening for depression. However, neither instrument adequately identified depression among residents with dementia (AUC between 0.57 and 0.70). Among the GDS variations, the 4- and 8-item scales had the highest AUC and the optimal cut-offs were >0 and >3, respectively.

Conclusions

The validity of the GDS in detecting depression requires a certain level of cognitive functioning. While the CS-GDS is designed to remedy this issue by using an informant, it did not have adequate validity in detecting depression among residents with dementia. Further research is needed on informant selection and other factors that can potentially influence the validity of proxy-based measures in the nursing home setting.

Impact and interest:

3 citations in Scopus
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3 citations in Web of Science®

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ID Code: 84925
Item Type: Journal Article
Refereed: Yes
Keywords: assessment, nursing homes, geriatric depression scale, depression
DOI: 10.1017/S1041610215000721
ISSN: 1741-203X
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > NURSING (111000) > Nursing not elsewhere classified (111099)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Nursing
Deposited On: 21 Jun 2015 22:56
Last Modified: 25 Sep 2015 01:09

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