Development and Validation of the Occupational Therapy Engagement Scale for Patients with Stroke

BACKGROUND/AIM: Almost all interventions in occupational therapy require the active engagement of the patients. However, no scale has been specifically designed for assessing engagement in occupational therapy. The purposes of this study were to develop the occupational therapy engagement scale (OTES) and to examine its unidimensionality, reliability, and predictive validity. METHODS: The OTES was developed through the review of similar scales, eight experts' opinions, cognitive interviews, and pilot testing. The unidimensionality was verified with Rasch model fitting and principal component analysis. The Rasch reliability was also estimated. Pearson's correlation coefficient (r) was used to validate the predictive validity by examining the association between the Rasch scores of the OTES and patients' performance of activities of daily living (ADL). RESULTS: A total of 253 patients with stroke were rated by 22 therapists using the OTES. The mean age of the patients was 62.3 ± 13.2 years old, and 65.2% of the patients were male. The infit and outfit MNSQ of the 12 items of the OTES ranged from 0.62 to 1.34. The unexplained variance of the first dimension of the principal component analysis was 4.0%. The mean person reliability of the OTES was 0.88. Pearson's r between the OTES and patients' ADL performance was 0.37. CONCLUSIONS: The results of Rasch analysis supported that the items of the OTES were unidimensional. The OTES had sufficient person reliability and predictive validity in patients with stoke.