Abstract
Adjustment disorder is one of the most prevalent in clinical practice; however, in México, there is a significant lack of standardized instruments for its identification. The New Module for the Measurement of Adjustment Disorder (ADNM-20) is a German self-report questionnaire with adequate psychometric properties based on the diagnostic criteria proposed by the ICD-11 composed of two central symptoms: worry and failure to adapt and four accessory symptoms: anxiety, depression, avoidance, and impulsivity. Objective. To validate ADNM-20 in a Mexican socio-cultural context. Method. ADNM-20 was translated into Spanish and submitted to a judgment of seven experts who provided suggestions about the linguistic relevance of the items. The corrections finally produced a culturally adapted version. Data collection involved 285 participants between 18 and 70 years who answered a digital battery of the Mexican adaptation of ADNM-20, the Check-List of Posttraumatic Stress Disorder for the DSM-5 (PCL-5), and The Abbreviated Multidimensional Scale of Coping Styles (Brief COPE). Subsequently, a confirmatory factor analysis (CFA) compared three models: (1) the unifactor model, (2) the model of six related factors, and (3) the second-order model. Results. The best fit resulted from the single-factor model. The internal consistency index was adequate (α=.937), and discriminant validity measures showed moderate to high negative correlations with active coping and coping through social support styles. Discussion. In the Mexican population, ADNM-20 is a valid and reliable instrument that assesses adjustment disorder through a unifactorial structure. However, additional studies controlling types of stressors are necessary to describe the dimensionality better.
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