Latent structure of the proposed ICD-11 post-traumatic stress disorder symptoms: Implications for the diagnostic algorithm
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Implication
Confirmatory factor analysis demonstrates a two-factor model improves PTSD diagnostic sensitivity in trauma patients, suggesting a streamlined symptom algorithm for ICD-11 criteria.
Key Points
- To evaluate the latent structure of proposed ICD-11 post-traumatic stress disorder (PTSD) symptoms and determine their implications for clinical diagnostic algorithms.
- Administered structured clinical interviews, disability assessments, and psychological quality of life (QoL) measures to injury patients (N=613) 6 years post-trauma.
- Conducted confirmatory factor analyses to assess the latent dimensionality of ICD-11 PTSD symptom criteria.
- A two-factor model demonstrated equivalent, if not superior, fit compared to the proposed ICD-11 three-factor model.
- The two-factor diagnostic algorithm significantly increased PTSD point prevalence from 3.4% to 5.1% (z = 2.32, P < 0.05).
- Patients identified via the two-factor model showed comparable impairment to those identified under standard ICD-11 criteria in disability (P = 0.933) and psychological QoL (P = 0.591).
Cite This Study
Forbes et al. (2015) studied this question.