... gaitparameters of the patients, includin g gender, age,GMFCS level, cadence, step length, and walking speed,were collected. Informed consent for the retrospectivereview of the gait analy sis data of patients ... 2009,29:251-255.5. Matsuo T, Hara H, Tada S: Selective lengthening of the psoas and rectusfemoris and preservation of the iliacus for flexion deformity of the hipin cerebral palsy patients. J Pediatr Orthop ... andincluded for analysis.Validity of kinematic and kinetic variables, and psoaslength in hip flexor functionThere are no gold standards for measuring hip flexorfunction during gait. Therefore,...