Latent structure of the proposed ICD-11 post-traumatic stress disorder symptoms: Implications for the diagnostic algorithm

Abstract

Background The latent structure of the proposed ICD-11 post-traumatic stress disorder (PTSD) symptoms has not been explored. Aims To investigate the latent structure of the proposed ICD-11 PTSD symptoms. Method Confirmatory factor analyses using data from structured clinical interviews administered to injury patients (n = 613) 6 years post-trauma. Measures of disability and psychological quality of life (QoL) were also administered. Results Although the three-factor model implied by the ICD-11 diagnostic criteria fit the data well, a two-factor model provided equivalent, if not superior, fit. Whereas diagnostic criteria based on this two-factor model resulted in an increase in PTSD point pre..