Development and cross‐cultural validation of the Japanese version of the Adjustment Disorder‐New Module‐20

Development and cross‐cultural validation of the Japanese version of the Adjustment Disorder‐New Module‐20

Abstract Aim Adjustment disorder (AjD) is a prevalent mental disorder with evolving definitions in the International Classification of Diseases, 11th Revision (ICD‐11). The Adjustment Disorder‐New Module‐20 (ADNM‐20) assesses six AjD symptom clusters based on the ICD‐11 criteria and has demonstrated...

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Main Authors: Atsuo Nakagawa, Dai Mitsuda, Yusuke Umegaki, Rahel Bachem, Waka Nogami, Ryotaro Higuchi, Aoi Ito, Hiroki Kocha
Format: Article
Language:English
Published: Wiley 2025-06-01
Series:PCN Reports
Subjects:
adjustment disorder
Adjustment Disorder‐New Module‐20 (ADNM‐20)
dimensional approach
ICD‐11
psychometric validation
Online Access:https://doi.org/10.1002/pcn5.70104
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Summary:Abstract Aim Adjustment disorder (AjD) is a prevalent mental disorder with evolving definitions in the International Classification of Diseases, 11th Revision (ICD‐11). The Adjustment Disorder‐New Module‐20 (ADNM‐20) assesses six AjD symptom clusters based on the ICD‐11 criteria and has demonstrated strong psychometric validity. This study aimed to develop and validate a Japanese version of the ADNM‐20 in the general population. Methods A forward–backward translation approach was used to develop the Japanese version of the ADNM‐20. Psychometric properties were assessed through a web‐based survey of 1314 participants, examining factorial validity, construct validity, and internal consistency. Results Confirmatory factor analysis supported the theoretical six‐factor model (comparative fit index = 0.923, root‐mean‐square error of approximation = 0.079), with strong correlations between the ADNM‐20 subscales and external measures (e.g., depression PHQ‐9, r = 0.71; anxiety GAD‐7, r = 0.72). The total ADNM‐20 showed excellent internal consistency (Cronbach's α = 0.953). Conclusion The Japanese ADNM‐20 is a valid and reliable scale for assessing AjD symptoms in the Japanese general population. Further studies involving clinical populations are warranted to confirm its applicability in clinical settings.
ISSN:2769-2558

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