Superior functional outcome after femoral derotation osteotomy according to gait analysis in cerebral palsy

Highlights • The outcome after femoral derotation osteotomy in cerebral palsy was investigated. • The deviation of derotation amount from hip rotation in gait analysis was calculated. • Optimum results if derotation amount averaged internal hip rotation in gait analysis. • Adverse effects if derotation amount deviated from hip rotation in gait analysis. • Derotation amount should be defined by gait analysis to obtain an optimum outcome.