2011 Volume 14 Issue 3 Pages 137-143
The purposes of this study were to perform the translation and cross-cultural adaptation of Lower Extremity Functional Scale (LEFS) into Japanese and to perform the pilot test using the Japanese version of the LEFS. The translation of the LEFS from English into Japanese was done in accordance with the published guidelines. 30 outpatients with any lower-extremity musculoskeltal condition participated in the pilot test. The internal consistency was assessed with the Cronbach alpha method, the face validity was assessed with a review of the results of the pilot test by the developer and an in-depth interview of patients about their understanding of the questionnaire. Cronbach alpha in the result of the pilot test was calculated as 0.95, which was interpreted as very good internal consistency. The developer's comment for the result of the pilot test was very good. These results suggest that the Japanese version of the LEFS has good measurement properties (internal consistency, face validity) and it can be used to a large scale field test.
