Culturally sensitive validation of screening questionnaires for depression in older African– Caribbean people living in south London

Abstract

BACKGROUND: We tested the validity of two screens for depression in older African-Caribbean adults, the 15-item Geriatric Depression Scale (GDS) and a new Caribbean Culture-Specific Screen for emotional distress (CCSS). Two independent criteria were used for validity: (a) a psychiatric diagnosis derived from GMS-AGECAT, and (b) a culturally sensitive assessment of mental disorder, derived from a tool developed with local African-Caribbean religious healers. METHOD: One hundred and sixty-four consecutive African-Caribbean primary care users, aged 60 years or older, were screened with the GDS and the CCSS. Diagnostic interviews were carried out on 80% of high scorers and 20% of low scorers. RESULTS: The number of cases detected by the two separate diagnostic approaches was similar. However, the agreement between who was and who was not a case was only modest. At a cut-off of > or = 5, the GDS was an adequate case detector for psychiatric depression, and, at a cut-off of > or = 4, for 'depressed/lost spirit', as defined by culture-specific criteria. It performed as well as the new CCSS. CONCLUSIONS: At a cut-off of > or = 4 the 15-item GDS can be recommended as a case detector for significant forms of depression in older African-Caribbean people living in south London.

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