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The Work And Social Adjustment Scale, Youth And Parent Versions: Psychometric Evaluation Of A Brief Measure Of Functional Impairment In Young People

Amita Jassi, Fabian Lenhard, Georgina Krebs, Martina Gumpert, Maral Jolstedt, Per Andrén, Martina Nord, Kristina Aspvall, Tove Wahlund, Chloe Volz, David Mataix-Cols

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AbstractThe Work and Social Adjustment Scale (WSAS) is a brief global measure of functional impairment that is widely used in adult health. We have adapted the WSAS for its use in youth, the WSAS-Youth version (WSAS-Y) and WSAS-Parent version (WSAS-P). This study evaluated the psychometric properties of the scale. The internal consistency, factor structure, convergent and divergent validity, test–retest reliability and sensitivity to change of the WSAS-Y/P were studied in 525 children and adolescents with obsessive–compulsive disorder and related disorders receiving treatment. The internal consistency of the WSAS-Y/P was excellent across diagnostic groups and time-points. Exploratory factor analysis extracted a single-factor of functional impairment, explaining in excess of 85% of the variance. The test–retest reliability was adequate. The WSAS-Y/P correlated more strongly with other measures of functional impairment than with measures of symptom severity, indicating good convergent/divergent validity. Finally, the WSAS-Y/P was highly sensitive to change after treatment.