title: The validation of the short form of the Geriatric Depression Scale (GDS) in Greece.
abstract: The Geriatric Depression Scale-15 (GDS-15) is a short, 15-item instrument specifically designed to assess depression in geriatric populations. Its items require a yes/no response. The Geriatric Depression Scale was first introduced by Yesavage et al. in 1983, and the short form (GDS-15) was developed by Sheikh and Yesavage in 1986. The aim of the current study was the standardization of the GDS-15 for use in Greece. Subjects were divided into Group A: 168 control subjects, and Group B: 103 patients suffering from clinically diagnosed depression. All were over 65 years of age. A score of 6/7 on the GDS-15 was found to be the best cut-off point for diagnosing depression in an elderly Greek population, with Sensitivity = 92.23 and Specificity = 95.24. GDS-15 manifests high internal consistency with Cronbach's alpha = 0.94, and all items seem to be equivalent. Factor Analysis of the GDS-15 revealed 4 factors: a cognitive (thought content), an affective, a functional, and a factor that reflects helplessness and fear for the future. The two diagnostic groups differed on all 4 factors scores at p-value <0.001.
authors.affiliation: Third Department of Psychiatry, Aristotle University of Thessaloniki, Greece. kfount@med.auth.gr
authors.forename: K N
authors.initials: KN
authors.lastname: Fountoulakis
authors.forename: M
authors.initials: M
authors.lastname: Tsolaki
authors.forename: A
authors.initials: A
authors.lastname: Iacovides
authors.forename: J
authors.initials: J
authors.lastname: Yesavage
authors.forename: R
authors.initials: R
authors.lastname: O'Hara
authors.forename: A
authors.initials: A
authors.lastname: Kazis
authors.forename: C
authors.initials: C
authors.lastname: Ierodiakonou
mesh_terms: D000368:Aged; D003863:Depression / Q000175:diagnosis* / Q000523:psychology; D005069:Evaluation Studies as Topic; D005163:Factor Analysis, Statistical; D005852:Geriatric Psychiatry / Q000379:methods*; D006801:Humans; D011569:Psychiatric Status Rating Scales / Q000592:standards* / Q000706:statistics & numerical data; D012680:Sensitivity and Specificity