Reliability and validity of the Japanese version of the Gait Assessment and Intervention Tool.

This study aimed to translate the Gait Assessment and Intervention Tool (G.A.I.T.) into Japanese and evaluate its reliability and validity. Translation and adaptation followed established cross-cultural guidelines. To assess reliability and validity of Japanese versions of the G.A.I.T, a cohort design was implemented. Sixty-three stroke patients participated in interrater reliability and validity assessments, and 50 patients in the test-retest evaluation. Reliability and validity were evaluated using intraclass correlation coefficients (ICC) and Pearson's correlation coefficients, respectively. The Japanese G.A.I.T. demonstrated excellent reliability in interrater (ICC = 0.975) and retest (ICC = 0.988). Significant correlations were observed between the G.A.I.T. scores and Fugl-Meyer Assessment-Lower Extremity ( r  = -0.774), Functional Ambulation Category ( r  = -0.720), Functional Independence Measure motor scores ( r  = -0.647), functional independence measure mobility ( r  = -0.688), and comfortable walking speed ( r  = -0.839). These findings suggest that the Japanese version of the G.A.I.T. is a reliable and valid assessment tool for evaluating gait coordination in Japanese stroke survivors.