Reliability and Validity of Chinese Version of Clinician Administered PTSD Scale
LAN Wei;SHI Qi-jia;Department of Outpatient, Wuhan Zhongde Psychology Hospital;
Objective:To examine the psychometric properties of Chinese version of Clinician Administered PTSD Scale(CAPS). Methods: A total of 104 subjects with high score(16) on PTSD symptoms were screened in a high school in Shifang City, Sichuan Province. These subjects were interviewed by trained evaluators using CAPS.Thirty-seven subjects were rated by two evaluators independently for investigating inter-rater consistency. Another35 subjects from a hospital for psychotherapy were interviewed using CAPS, and after 3 days of CAPS interviews,these subjects accepted the PTSD module of SCID interviews by trained evaluators for examining criterion-related validity of CAPS. Results: The coefficient of the overall PTSD diagnosis of 37 subjects rated by two raters was Kappa=1. Pearson correlation coefficients of CAPS total score and three subscale scores were all above 0.9(n=37,P0.01), showing strong inter-rater reliability. The alpha coefficient of CAPS total score was above 0.9, three subscale alpha coefficients were above 0.75(n=139), showing that the Chinese version of CAPS had acceptable homogeneity in the overall level and subscale level. Kappa test of diagnostic data of CAPS and PTSD module of SCID showed that Kappa value reached 0.75(n=35), which meant in the total score and subscale scores these two measurements were significantly associated and CAPS had good criterion-related validity. Conclusion: Chinese version of CAPS was a reliable and effective tool of PTSD assessment.