valuating the Responsiveness of 2 Versions of the Gross otor Function Measure for Children With Cerebral Palsy
Objective: To compare the responsiveness to motor change f the original version of Gross Motor Function Measure GMFM-88) and its second version (GMFM-66) in children ith cerebral palsy (CP). Design: Cross-sectional study. Setting: Seven rehabilitation pediatric clinics. Participants: Sixty-five children with CP (age range, .5 9.4y; mean, 3.7 1.9y) were recruited. Intervention: The children’s motor ability was assessed wice with a mean interval of 3.5 months using all of the MFM-88 items. A 3-category range of therapist judgments on he children’s meaningful motor improvement was used as an xternal standard. Main Outcome Measures: GMFM-88 scores, GMFM-66 cores, and therapists’ judgments. Results: Regarding the association with the therapist judgents, the overall responsiveness of GMFM-66 is superior to hat of GMFM-88. Both measures’ sensitivities of the responiveness are similar, but GMFM-66 has better specificity. Conclusions: To evaluate the motor change in a sample of hildren with CP over a mean interval of 3.5 months by using he 2 versions of GMFM, the GMFM-66 was more responsive han the GMFM-88 with respect to consistency with therapist linically meaningful judgments.