BACKGROUND Transverse-plane kinematic deviations of lower limbs are common in children with unilateral cerebral palsy (UCP), often with detrimental consequences for gait. RESEARCH QUESTION To identify the most important factor among rotational anomalies of lower limbs for gait in children with UCP. METHODS In a descriptive observational study, 42 children with UCP (age; 5-8 years) who had the ability of independent walking were included. Comprehensive gait analysis was performed and included assessment of the transverse-plane kinematic deviations of the lower limbs [pelvis, hip, and ankle rotation angles, and foot progression (FP) angle], and spatial-temporal gait features [velocity, step length (SL), single-limb support time (SLSt), temporal gait-symmetry index (T-GSI), and spatial gait-symmetry index (S-GSI)]. RESULTS AND SIGNIFICANCE The regression analysis indicated that hip rotation was the key determinant of gait velocity (R2 = 0.75, P < .001) and S-GSI (R2 = 0.24, P = .001). The FP angle was the most important factor for T-GSI (R2 = 0.22, P = .002). The ankle rotation explained in part the variance in T-GSI (R2 = 0.10, P = .001). CONCLUSION Gait velocity and spatial gait-symmetry are primarily affected by hip rotation anomalies. The temporal gait-symmetry is generally associated with the FP angle deviation and partly with ankle rotation deviation.

中文翻译：

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单侧脑瘫患儿下肢横断面运动学偏差与步态表现之间的关系：描述性分析。

背景技术单侧脑瘫（UCP）患儿常见下肢横断面运动学偏差，通常对步态有不利影响。研究问题旨在确定UCP患儿步态下肢旋转异常中最重要的因素。方法在一项描述性观察性研究中，纳入了42例具有独立行走能力的UCP儿童（年龄； 5-8岁）。进行了全面的步态分析，包括评估下肢的横断面运动学偏差[骨盆，髋部和踝关节旋转角以及足部前进（FP）角]，以及时空步态特征[速度，步长（ SL），单肢支撑时间（SLSt），时间步态对称指数（T-GSI）和空间步态对称指数（S-GSI）]。结果与意义回归分析表明，髋关节旋转是步态速度（R2 = 0.75，P <.001）和S-GSI（R2 = 0.24，P = .001）的关键决定因素。FP角是T-GSI的最重要因素（R2 = 0.22，P = .002）。踝关节旋转部分解释了T-GSI的变化（R2 = 0.10，P = .001）。结论步态速度和空间步态对称性主要受髋关节旋转异常影响。时间步态的对称性通常与FP角度偏差有关，部分与踝关节旋转偏差有关。结论步态速度和空间步态对称性主要受髋关节旋转异常影响。时间步态的对称性通常与FP角度偏差有关，部分与踝关节旋转偏差有关。结论步态速度和空间步态对称性主要受髋关节旋转异常影响。时间步态的对称性通常与FP角度偏差有关，部分与踝关节旋转偏差有关。