Abstract
We aimed to evaluate the validity and reliability of the Turkish version of the Patient-Reported Impact of Spasticity Measure (PRISM-TR). Expert opinions and the forward-back translation method were used for linguistic validation. Cronbach α and test-retest analysis were performed for reliability analysis. Correlations between the PRISM-TR and the Modified Ashworth Scale (MAS), the Numerical Rating Scale (NRS), and the Expanded Disability Status Scale (EDSS) were assessed. A total of 206 individuals with multiple sclerosis (MS; 139 women; mean age, 47.7 ± 11.3 years; mean EDSS score, 5.2 ± 1.5) who had not had a relapse in the previous 3 months were included in the study. Test-retest correlation coefficients were high for all subdimensions of the scale (0.95-0.99). All Cronbach α values for the PRISM-TR subdimensions, except for Positive Impact, were likewise quite high (0.85-0.94). PRISM-TR subscale scores were correlated with MAS, NRS, and EDSS scores (P < .001). PRISM-TR is a valid and reliable scale for use with Turkish individuals with MS. It is simple to use in the clinic and can be helpful in detecting patients' spasticity early in the disease course.
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