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    Measuring ICD-11 adjustment disorder: the development and initial validation of the International Adjustment Disorder Questionnaire

    Shevlin, Mark and Hyland, Philip and Ben-Ezra, Menachem and Karatzias, Thanos and Cloitre, Marylene and Vallières, Frédérique and Bachem, R and Maercker, Andreas (2020) Measuring ICD-11 adjustment disorder: the development and initial validation of the International Adjustment Disorder Questionnaire. Acta Psychiatrica Scandinavica, 141 (3). pp. 265-275. ISSN 1600-0447

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    Background: Adjustment disorder (AjD) is one of the most frequently used diagnoses in psychiatry but a diagnostic definition for AjD was only introduced in release of the ICD-11. This study sought to develop and validate a new measure operationalizing the ICD-11's narrative description of AjD, and to determine the current rate of people meeting the symptoms indicative of AjD in the general population of the Republic of Ireland. Methods: The International Adjustment Disorder Questionnaire (IADQ) was constructed to measure the core diagnostic criteria of ICD-11 AjD: stressor exposure, preoccupations with, and failure to adapt to, the stressor, timing of symptom onset, and functional impairment. A nationally representative sample (N = 1,020) of adults from Ireland completed the IADQ. Results: Confirmatory factor analysis supported construct validity and the reliability estimates were excellent. The IADQ correlated strongly with depression, anxiety, and posttraumatic stress. The criteria were met by 7.0% of the sample, adjusted for other exclusionary disorders. Discussion: The IADQ is a measure based on the ICD-11's description and produces reliable scores, however it should not be used for clinical assessment until validated with clinical interviews.

    Item Type: Article
    Keywords: adjustment disorder; AjD; ICD-11; The International Adjustment Disorder Questionnaire;
    Academic Unit: Faculty of Science and Engineering > Psychology
    Item ID: 14103
    Identification Number:
    Depositing User: Philip Hyland
    Date Deposited: 01 Mar 2021 14:52
    Journal or Publication Title: Acta Psychiatrica Scandinavica
    Publisher: Wiley
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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