Measuring ICD-11 Adjustment Disorder: The Development and Initial Validation of the International Adjustment Disorder Questionnaire

M Shevlin, Philip Hyland, Menachem Ben-Ezra, Thanos Karatzias, Marylène Cloitre, Frederique Vallieres, Rahel Bachem, Andreas Maercker

Research output: Contribution to journalArticle

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.
LanguageEnglish
JournalActa Psychiatrica Scandinavica
Early online date12 Nov 2019
Publication statusE-pub ahead of print - 12 Nov 2019

Fingerprint

Adjustment Disorders
Ireland
Reproducibility of Results
Statistical Factor Analysis
Psychiatry
Anxiety
Interviews
Depression
Surveys and Questionnaires
Population

Cite this

Shevlin, M ; Hyland, Philip ; Ben-Ezra, Menachem ; Karatzias, Thanos ; Cloitre, Marylène ; Vallieres, Frederique ; Bachem, Rahel ; Maercker, Andreas. / Measuring ICD-11 Adjustment Disorder: The Development and Initial Validation of the International Adjustment Disorder Questionnaire. In: Acta Psychiatrica Scandinavica. 2019.
@article{37c71cdc8e184f459a9778af02ff897f,
title = "Measuring ICD-11 Adjustment Disorder: The Development and Initial Validation of the International Adjustment Disorder Questionnaire",
abstract = "BackgroundAdjustment 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.MethodsThe 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.ResultsConfirmatory 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.DiscussionThe 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.",
author = "M Shevlin and Philip Hyland and Menachem Ben-Ezra and Thanos Karatzias and Maryl{\`e}ne Cloitre and Frederique Vallieres and Rahel Bachem and Andreas Maercker",
year = "2019",
month = "11",
day = "12",
language = "English",
journal = "Acta Psychiatrica Scandinavica",
issn = "0001-690X",

}

Measuring ICD-11 Adjustment Disorder: The Development and Initial Validation of the International Adjustment Disorder Questionnaire. / Shevlin, M; Hyland, Philip; Ben-Ezra, Menachem; Karatzias, Thanos; Cloitre, Marylène; Vallieres, Frederique; Bachem, Rahel ; Maercker, Andreas.

In: Acta Psychiatrica Scandinavica, 12.11.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Measuring ICD-11 Adjustment Disorder: The Development and Initial Validation of the International Adjustment Disorder Questionnaire

AU - Shevlin, M

AU - Hyland, Philip

AU - Ben-Ezra, Menachem

AU - Karatzias, Thanos

AU - Cloitre, Marylène

AU - Vallieres, Frederique

AU - Bachem, Rahel

AU - Maercker, Andreas

PY - 2019/11/12

Y1 - 2019/11/12

N2 - BackgroundAdjustment 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.MethodsThe 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.ResultsConfirmatory 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.DiscussionThe 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.

AB - BackgroundAdjustment 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.MethodsThe 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.ResultsConfirmatory 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.DiscussionThe 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.

M3 - Article

JO - Acta Psychiatrica Scandinavica

T2 - Acta Psychiatrica Scandinavica

JF - Acta Psychiatrica Scandinavica

SN - 0001-690X

ER -