Abstract
Objective:
The 11th version of the International Classification of Diseases (ICD-11) has proposed two related trauma diagnoses: Post-traumatic stress disorder (PTSD) and Complex PTSD (CPTSD). Using a newly developed, disorder-specific measure of PTSD and CPTSD called the International Trauma Questionnaire
(ITQ) the current studywill (i) assess the factorial validity of ICD-11 PTSD and CPTSD; (ii) provide the first test of the discriminant validity of these constructs; and (iii) provide the first comparison of ICD-11, and Diagnostic and
Statistical Manual, Fifth Edition (DSM-5), PTSD diagnostic rates using
disorder-specific measures.
Method:
ICD-11 and DSM-5 PTSD-specific measures were completed
by a British clinical sample of trauma-exposed patients (
N=
171). The
structure and validity of ICD-11 PTSD and CPTSD were assessed by
means of factor analysis and assessing relationships with criterion
variables.
Results:
Diagnostic rates under ICD-11 were significantly lower than
those under DSM-5. A two-factor second-order model reflecting the
distinction between PTSD and CPTSD best represented the data from
the ITQ; and the PTSD and CPTSD factors differentially predicted
multiple psychological variables.
Conclusion:
The factorial and discriminant validity of ICD-11 PTSD
and CPTSD was supported, and ICD-11 produces fewer diagnostic
cases than DSM-5.
The 11th version of the International Classification of Diseases (ICD-11) has proposed two related trauma diagnoses: Post-traumatic stress disorder (PTSD) and Complex PTSD (CPTSD). Using a newly developed, disorder-specific measure of PTSD and CPTSD called the International Trauma Questionnaire
(ITQ) the current studywill (i) assess the factorial validity of ICD-11 PTSD and CPTSD; (ii) provide the first test of the discriminant validity of these constructs; and (iii) provide the first comparison of ICD-11, and Diagnostic and
Statistical Manual, Fifth Edition (DSM-5), PTSD diagnostic rates using
disorder-specific measures.
Method:
ICD-11 and DSM-5 PTSD-specific measures were completed
by a British clinical sample of trauma-exposed patients (
N=
171). The
structure and validity of ICD-11 PTSD and CPTSD were assessed by
means of factor analysis and assessing relationships with criterion
variables.
Results:
Diagnostic rates under ICD-11 were significantly lower than
those under DSM-5. A two-factor second-order model reflecting the
distinction between PTSD and CPTSD best represented the data from
the ITQ; and the PTSD and CPTSD factors differentially predicted
multiple psychological variables.
Conclusion:
The factorial and discriminant validity of ICD-11 PTSD
and CPTSD was supported, and ICD-11 produces fewer diagnostic
cases than DSM-5.
Original language | English |
---|---|
Pages (from-to) | 536-546 |
Number of pages | 11 |
Journal | Acta Psychiatrica Scandinavica |
Volume | 138 |
Issue number | 6 |
Early online date | 3 Sept 2018 |
DOIs | |
Publication status | Published online - 3 Sept 2018 |
Keywords
- ICD-11 PTSD and CPTSD
- International Trauma Questionnaire
- validation