Clinical Study
Reliability and Validity of the Persian Version of the Fatigue Severity Scale in Idiopathic Parkinson’s Disease Patients
Table 4
Trans-cultural reliability and validity of the different language versions of the FSS questionnaire in Parkinson’s disease patients.
| Study group | Year | Language | Reliability | Validity | Internal consistency (Spearman R) | Internal consistency (Cronbach’s ) | Correlation coefficient (UPDRS) | Correlation coefficient (Hoehn and Yahr) |
| Hagell et al. [19] | 2006 | Swedish | — | 0.94 | — | — | Grace et al. [20] | 2007 | English | 0.44–0.78 | 0.91 | — | — | Valderramas et al. [21] | 2012 | Brazilian-Portuguese | — | 0.95 | 0.45 | 0.40 | Current study | 2013 | Persian | 0.76–0.92 | 0.96 | 0.55 | 0.48 |
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