Abstract: Objective: Depression is one of the most common mental illnesses. The reliability and the validity of the Patient Health Questionnaire (PHQ)-9, a depression screening tool, have not been examined in the general population in China.

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Abstract: Objective: To examine the psychometric properties of two brief screening questionnaires for common mental disorders in general practices in areas speaking the three main Nigerian languages.Method: Consecutives attendees of selected general practices in Ibadan, Enugu and Kaduna were screened with the GHQ 12 and K6. We selected all cases and 50% of non cases for second stage interview with the Composite International Diagnostic Interview (CIDI).

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