The Chinese version of the Davidson Trauma Scale: A practice test for validation

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Abstract
The Chinese version of the Davidson Trauma Scale (DTS‐C) was developed to respond to the need of Chinese‐speaking individuals. The DTS is a validated self‐rating scale used in the diagnosis of posttraumatic stress disorder (PTSD). The DTS‐C is translated from DTS through a two‐stage translation. Subjects were drawn from a sample of 210 survivors of the 21 September 1999, Chi‐Chi Earthquake. The scale showed good internal consistency (Cronbach's α = 0.97) and test–retest reliability (r = 0.88). Concurrent validity was obtained against the clinical diagnostic interview, with a diagnostic accuracy of 0.85 at DTS‐C score of 44. It showed that the sensitivity was 0.9, specificity 0.81, positive likelihood ratio 4.74, and negative likelihood ratio 0.12. The recommended stratum‐specific likelihood ratios were 0.10 (95% CI: 0.05–0.20) for the score range 0–39, 4 (2.22–7.23) for the score range of 40–59, and 6.14 (3.42–11.02) for the scores above 60. In PTSD diagnosed subjects, the factor structures closely resembled the DSM‐IV grouping of PTSD symptoms. The psychometric strength of DTS‐C is reliable for its future use, particularly for screening for subjects with possible diagnosis of PTSD.