Reliability and validity of the Chinese version of the XXXX Health Questionnaire (PHQ-9) in the general population.

@entity1 @entity308 @entity214
OBJECTIVE: @entity308 is one of the most common mental illnesses. The reliability and the validity of the @entity1 Health Questionnaire (PHQ)-9, a @entity308 screening tool, have not been examined in the general population in China. Thus, this study evaluated the reliability and the validity of the Chinese version of the PHQ-9 in detecting major @entity308 in residents of a Chinese community. METHODS: A total of 1045 @entity1 from a Shanghai community were enrolled in our study. @entity1 completed the Chinese versions of the PHQ-9, the Self-Rating @entity308 Scale ( @entity214 ), the 36-item Short Form Health Survey (SF-36), and the Mini International Neuropsychiatric Interview. One hundred @entity1 were randomly selected to complete the PHQ-9 again 2 weeks after the initial assessment. The reliability, the validity and the receiver operating characteristic (ROC) curve of the PHQ-9 were analyzed. RESULTS: Cronbach's alpha for the internal consistency reliability of the Chinese version of the PHQ-9 was 0.86 for the entire scale. The correlation coefficient for the 2-week test-retest of the total score was 0.86. The PHQ-9 scale correlated positively with the @entity214 (r=0.29, p<0.001) and correlated negatively with all subscale scores of the SF-36 (correlation coefficients ranged from -0.11 to -0.47, p<0.001). The area under the curve of the ROC was 0.92 (95% confidence interval: 0.86-0.97). A cutoff score of 7 or higher on the PHQ-9 had a sensitivity of 0.86 and a specificity of 0.86. CONCLUSIONS: In the general Chinese population, the Chinese version of the PHQ-9 is a valid and efficient tool for screening @entity308 , with a recommended cutoff score of 7 or more.
