To understand the relationship between the gait patterns in transverse plane and the transverse plane deformities.

We evaluated the clinical, radiological, and three-dimensional gait analysis data of 152 spastic diplegics with transverse plane deformities. We define the transverse plane deformities as follows: 1) femoral anteversion ≥30 °, 2) thigh foot angle ≤-5 ° or ≥25 °, 3) severe foot deformities that could affect the foot progression angle.

We classified gait patterns of spastic diplegics into 6 groups on the base of pelvic compensation and foot progression angle, and divided anatomic characteristics into symmetric and asymmetric type. Among the gait patterns, pattern I-A (in-toeing with pelvic compensation) and II-A (in-toeing without pelvic compensation) were most prevalent. Femoral antetorsion was the most frequent torsional deformities, whereas valgus of foot was second most.

We classified the gait patterns and analyzed the relationship between each gait pattern and types of torsional deformities.