Purpose: The main aim of this study was to analyse the psychometric properties of the Polish version of the Multiple Sclerosis Self-Management-Revised Scale.
Methods: A total of 663 patients with multiple sclerosis were included in this study. The Polish version of the Multiple Sclerosis Self-Management-Revised Scale, The General Self-Efficacy Scale, Multiple Sclerosis Impact Scale-29, and Expanded Disability Status Scale were used. Cronbach's alpha and McDonald's omega coefficients were calculated to assess the Polish version of the scale's reliability. The reliability of the scale's test items was assessed using an information function with the multidimensional graded response model. Confirmatory factor and principal component analyses were conducted.
Results: Cronbach's α and McDonald's ω were obtained (α = 0.896, ω = 0.909). Correlations between the scores of the Polish version of the Multiple Sclerosis Self-Management-Revised Scale and the General Self-Efficacy Scale (r = 0.34; p < 0.001) and the neurological assessment of patients by a physician (r = -0.23; p < 0.001) were significant. The original factor structure of the scale was not confirmed (Chi2(242) = 1480; p < .001; CFI = 0.829; TLI = .805; RMSEA = 0.088, 90% CI = [0.084-0.092]; SRMR = 0.079).
Conclusions: Using only the total score of the Multiple Sclerosis Self-Management-Revised Scale is recommended for Polish patients. The scale's factor structure requires further study.Implications for rehabilitationThe Polish version of the Multiple Sclerosis Self-Management-Revised Scale was reliable and valid when used in adult multiple sclerosis patients.At present, we recommend using only the total score of the Multiple Sclerosis Self-Management-Revised Scale. Further research is needed to distinguish the detailed subscales of the Polish version of the tool.The Polish version of the Multiple Sclerosis Self-Management-Revised Scale can be used in clinical practice and for research purposes to assess the general level of self-management in Polish-speaking multiple sclerosis patients in Poland.
Keywords: Multiple sclerosis self-management-revised scale; multiple sclerosis; reliability; self-management; validity.