Journal article

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

David Forbes, Emma Lockwood, Mark Creamer, Richard A Bryant, Alexander C McFarlane, Derrick Silove, Angela Nickerson, Meaghan O'Donnell

BRITISH JOURNAL OF PSYCHIATRY | CAMBRIDGE UNIV PRESS | Published : 2015

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..

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