Gannotti Mary, Gorton George E, Nahorniak Maureen T, Gagnaire Nicole, Fil Adrienne, Hogue Jill, Julewicz Jessica, Hersh Elana, Marchion Valerie, Masso Peter D
Physical Therapy Department, University of Hartford, West Hartford, CT 06111, USA.
J Pediatr Orthop. 2008 Jan-Feb;28(1):103-11. doi: 10.1097/bpo.0b013e31815b12b8.
The purpose of this study was to explore changes in body mass index (BMI), gait velocity, mean knee flexion in stance, and popliteal angle with age in ambulatory children with cerebral palsy.
A cross-sectional sample of 188 ambulatory children with cerebral palsy Gross Motor Function Classification System II or III who had a motion analysis evaluation. Subjects had no previous surgical interventions and were between the ages of 4 and 21. Velocity was normalized to limb length, and BMI was converted to age-adjusted percentile scores (BMI-a).
For GMFCS level II children, age and normalized velocity demonstrated a moderate and significant relationship (r = -0.4; P = 0.000). Age explained 20% of the variance in normalized velocity (P = 0.000). Weak but significant relationships were found between mean knee flexion in stance and normalized velocity (r = -0.3; P = 0.000) and popliteal angle and age (r = 0.3; P < 0.002). For GMFCS level III children, the following variables demonstrated a weak but significant association: normalized velocity and BMI-a (r = 0.3; P < 0.006), popliteal angle, and mean knee flexion in stance (r = 0.3; P < 0.022). Age was not associated with velocity, mean knee flexion in stance, BMI-a, or popliteal angle.
For GMFCS level II children, as age increases, there is a slight decrease in normalized velocity, and with decreasing normalized velocity, there is slightly increased mean knee flexion in stance. For GMFCS level III children, age was not associated with slower velocities, increased mean knee flexion in stance, or increased popliteal angle. Increased BMI-a was not associated with slower gait velocities or increased mean knee flexion in stance. Increasing BMI-a was not associated with increasing age.
本研究旨在探讨脑性瘫痪的非卧床儿童的体重指数（BMI）、步速、站立时平均膝关节屈曲度和腘角随年龄的变化情况。
选取188例具有 Gross Motor Function Classification System II 或 III 级的脑性瘫痪非卧床儿童作为横断面样本，这些儿童均接受了运动分析评估。受试者此前未接受过手术干预，年龄在4至21岁之间。步速根据肢体长度进行标准化，BMI 转换为年龄校正百分位数得分（BMI-a）。
对于 GMFCS II 级儿童，年龄与标准化步速呈中度显著相关（r = -0.4；P = 0.000）。年龄解释了标准化步速中20%的变异（P = 0.000）。站立时平均膝关节屈曲度与标准化步速之间存在微弱但显著的关系（r = -0.3；P = 0.000），腘角与年龄之间也存在微弱但显著的关系（r = 0.3；P < 0.002）。对于 GMFCS III 级儿童，以下变量呈现微弱但显著的关联：标准化步速与 BMI-a（r = 0.3；P < 0.006）、腘角和站立时平均膝关节屈曲度（r = 0.3；P < 0.022）。年龄与步速、站立时平均膝关节屈曲度、BMI-a 或腘角均无关联。
对于 GMFCS II 级儿童，随着年龄增长，标准化步速略有下降，且随着标准化步速降低，站立时平均膝关节屈曲度略有增加。对于 GMFCS III 级儿童，年龄与较慢的步速、站立时平均膝关节屈曲度增加或腘角增加均无关联。BMI-a 增加与较慢的步态速度或站立时平均膝关节屈曲度增加无关。BMI-a 增加与年龄增长无关。
