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The validity and reliability of the PHQ-9 in screening for post-stroke depression.Reliability and validity of the Thai version of the WHO-Five Well-Being Index in primary care patients.CONCLUSION: The Thai version of the PHQ-9 has acceptable psychometric properties for screening for major depression in general practice with a recommended cut-off score of nine or greater.
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The area under the curve (AUC) in this study was 0.89 (SD = 0.05, 95% CI 0.85 to 0.92).
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The Thai version of the PHQ-9 had satisfactory internal consistency (Cronbach's alpha = 0.79) and showed moderate convergent validity with the HAM-D (r = 0.56 P /= 9 revealed a sensitivity of 0.84, specificity of 0.77, positive predictive value (PPV) of 0.21, negative predictive value (NPV) of 0.99, and positive likelihood ratio of 3.71. The mean age of the participants was 45.0 years (SD = 14.3) and 73.7% of them were females. RESULTS: Complete data were obtained from 924 participants and 279 interviewed respondents. In the assessment, reliability and validity analyses, and receiver operating characteristic curve analysis were performed. These tools served as gold-standards for diagnosing depression and for assessing symptom severity, respectively. Of these 1,000 patients, 300 were further assessed by the Thai version of the Mini International Neuropsychiatric Interview (MINI) and the Thai version of the Hamilton Rating Scale for Depression (HAM-D). The PHQ-9 was then administered among 1,000 patients in family practice clinic. The process involved back-translation, cross-cultural adaptation, field testing of the pre-final version, as well as final adjustments. METHODS: The English language PHQ-9 was translated into Thai. This study aims to examine the reliability and validity of a Thai version Patient Health Questionnaire (PHQ-9) as a screening tool for major depression in primary care patients. The long process makes them impractical for routine use in primary care. N2 - BACKGROUND: Most depression screening tools in Thailand are lengthy. T1 - Reliability and validity of the Thai version of the PHQ-9.