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

2019/11/13 by Mark Shevlin, M. Shevlin, P. Hyland +13 · 26 citations
Psychology · Medicine · #Personality Disorders and Psychopathology #Bipolar Disorder and Treatment #Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes

paper · doi:10.1111/acps.13126

Abstract

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.

Citations

• The International Trauma Questionnaire: development of a self‐report measure of ICD‐11 PTSD and complex PTSD

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