The Japanese version of the Dizziness Handicap Inventory as an index of treatment success: Exploratory factor analysis

Abstract

Cronbach's coefficients for internal consistency were high for the total scale (0.93) and good for the subscales: functional subscale (0.87), physical subscale (0.82), and emotional subscale (0.85). The correlation matrix demonstrated that the variables were suited for factor analysis. The determinant was 1.26E(-6), which is slightly under the recommended value. Bartlett's test was highly significant (p < 0.0001), and the Kaiser-Meyer-Olkin measure of sampling adequacy was 0.91.