The reliability and validity of various items of the Stroke Impairment Assessment Set (SIAS) was examined, including affected-side motor function, muscle tone, deep tendon reflexes, and unaffected-side function.
The weighted κ value, which is an index of interrater reproducibility, was more than 0.854 for affectedside motor function and more than 0.500 for the other items. Rank correlation coefficients in comparison with other evaluation methods were more than 0.710 for affected-side motor function, more than 0.948 for muscle tone, and more than 0.851 for deep tendon reflexes. Stepwise multiple regression analysis demonstrated that gait speed was explained with a coefficient of determination of 56.3% by these SIAS items, and locomotion-ADL was 62.4% explained.
These results indicated that the SIAS items examined had a high reliability and validity.
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