THE RELIABILITY AND VALIDITY OF THE COLLATERAL SOURCE VERSION OF THE GERIATRIC DEPRESSION RATING SCALE ADMINISTERED BY TELEPHONE

Autor: Steven P. Wengel, Deborah M. Conley, William H. Roccaforte, William J. Burke, Sunil R. Rangwani, Jane F. Potter
Rok vydání: 1997
Předmět:
Zdroj: International Journal of Geriatric Psychiatry. 12:288-294
ISSN: 1099-1166
0885-6230
DOI: 10.1002/(sici)1099-1166(199703)12:3<288::aid-gps474>3.0.co;2-1
Popis: Objective. To prospectively evaluate the reliability and validity of the Collateral Source Geriatric Depression Scale (CS-GDS) administered by telephone (T-CS-GDS) in patients undergoing outpatient comprehensive geriatric assessment. Subjects. Eighty-three geriatric patients evaluated in a 1-year period at the outpatient Geriatric Assessment Center of the University of Nebraska Medical Center. Methods. The 30-item CS-GDS was completed by the collateral source of all patients on three occasions: by telephone several days before their assessment, face-to-face during their assessment visit and several days later, again by phone. During their assessment, all patients were evaluated by one of three geriatric psychiatrists who were blinded to CS-GDS results. The test–retest reliability of the T-CS-GDS was measured by comparing the results of the two phone interviews. The construct validity of the T-CS-GDS was estimated by comparing the results of the initial T-CS-GDS with the CS-GDS obtained during the comprehensive assessment. The criterion validity of the T-CS-GDS was estimated by comparing the results of the T-CS-GDS with the clinical diagnosis of depression assigned by the psychiatrists. Results. The individual items of the initial T-CS-GDS showed substantial concordance with the second T-CS-GDS (kappa range 0.41–0.8, mean=0.61) and with the assessment GDS (kappa range 0.33–0.85, mean=0.61). Twelve items showed evidence of bias when comparing the two T-CS-GDSs and four items when comparing the initial T-CS-GDS with the CS-GDS done during the assessment. The mean number of symptomatic responses was not significantly different for the T-CS-GDS vs assessment administration but did decline slightly when comparing the two T-CS-GDSs. ROC curve analysis showed good agreement between the clinical diagnosis and the T-CS-GDS. Conclusion. The CS-GDS appears to maintain its reliability and validity when administered via telephone and thus may be useful for a variety of epidemiologic and clinical purposes. © 1997 by John Wiley & Sons, Ltd.
Databáze: OpenAIRE
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