4.6 Article

Test-Retest Reliability and Responsiveness of the Computerized Adaptive Test of Social Functioning in Persons With Stroke

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W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.apmr.2023.03.017

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Health Care; Outcome Assessment; Patient Reported Outcome Measures; Psychometrics; Rehabilitation; Stroke

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The study found that the Computerized Adaptive Test of Social Functioning (Social-CAT) is a reliable and efficient measure with good test-retest reliability, small random measurement error, and good responsiveness. It is therefore a useful outcome measure for routine monitoring of social function changes in patients with stroke.
Objective: To examine the test-retest reliability, minimal detectable change (MDC), responsiveness, and efficiency of the Computerized Adap-tive Test of Social Functioning (Social-CAT) in patients with stroke.Design: Repeated-assessments design.Setting: A department of rehabilitation of a medical center.Participants: In total, 31 patients with chronic stroke and 65 patients with subacute stroke were recruited.Intervention: Not available.Main Outcome Measure: Social-CAT.Results: The Social-CAT showed acceptable test-retest reliability (intraclass correlation coefficient, 0.80) and small random measurement error (MDC%: 18.0%). However, heteroscedasticity was found (r between the means and the absolute change scores: 0.32), so the MDC% adjusted cut-off score is recommended for determining real improvement. Regarding responsiveness, the Social-CAT showed large differences (Kazis' effect size and standardized mean response: 1.15 and 1.09, respectively) in subacute patients. Regarding efficiency, the Social-CAT required an average of 5 items and less than 2 minutes for completion.Conclusions: Our findings indicate that the Social-CAT is a reliable and efficient measure with good test-retest reliability, small random measurement error, and good responsiveness. Thus, the Social-CAT is a useful outcome measure for routine monitoring of the changes in social function of patients with stroke.(c) 2023 by the American Congress of Rehabilitation Medicine.

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