Validity and Reliability of the Turkish Version of the Modified COVID-19 Yorkshire Rehabilitation Scale

INTRODUCTION: Post-COVID syndrome (PCS) is defined as persistent or emerging symptoms after infection with the virus. The COVID-19 Yorkshire Rehabilitation Scale was developed to identify and measure the severity of PCS symptoms and was later modified. This study aimed to evaluate the validity and reliability of the modified COVID-19 Yorkshire Rehabilitation Scale.
METHODS: Language validity, content validity, exploratory factor analysis, and confirmatory factor analysis were performed for construct validity of the scale. Guttman split-half coefficients obtained by the split-half method, Cronbach alpha values, and intraclass correlation coefficients (ICC) examined the reliability of the fit.
RESULTS: The study included 202 patients with a mean age of 57.6±13.4 years. Construct validity results showed that factorial findings demonstrated the factorable structure (Bartlett’s test of sphericity (χ2=1554.8; p<0.001) and good model fit (NFI=0.88, GFI=0.85, root mean square error of approximation=0.10, root mean square residual=0.03) for the present data. For criterion validity, correlation coefficients were found to range from −0.22 to 0.57 (p<0.05, for all), indicating moderate relationships between sub-dimensions. In addition, a high level of reliability was found for the adaptation, as suggested by Guttman’s split-half coefficients (0.90, 0.83, and 0.88 for symptom severity, functional ability, and the full scale, respectively), Cronbach’s alpha (0.89, 0.83, 0.92), and ICC coefficients (0.88, 0.81, 0.90).
DISCUSSION AND CONCLUSION: The Turkish version of C19-YRSm has 2 sub-dimensions such as symptom severity and functional ability and is a valid and reliable instrument for measuring patient assessment and monitoring in PCS in Turks.