Corrected FIM effectiveness as an index independent of FIM score on admission

Tokunaga M, Nakanishi R, Watanabe S, Maeshiro I, Hyakudome A, Sakamoto K, Okubo T, Nojiri S, Yamanaga H. Corrected FIM effectiveness as an index independent of FIM score on admission. Jpn J Compr Rehabil Sci 2014; 5: 7－11. Objective: To correct Functional Independence Measure (FIM) effectiveness for low FIM scores to obtain an index independent of FIM score on admission. Methods: A total of 1,101 stroke patients in Kaifukuki rehabilitation wards were studied. They were divided into 13 groups according to the motor FIM score on admission, in 6-point increments. The parameter “A” was derived so that motor FIM effectiveness, calculated as motor FIM gain/(A － motor FIM score on admission), was around 0.65. Results: Motor FIM effectiveness was an index independent of motor FIM score on admission when A was 42, 64, 79, 83, 87, 89, or 91 points (when motor FIM on admission was 13－18 points, 19－24 points, 25－30 points, 31－36 points, 37－42 points, 43－48 points, or 49－90 points). Conclusions: Corrected FIM effectiveness, which is independent of FIM on admission, may be useful for comparisons between hospitals admitting patients with varying degrees of severity.