Wong Christian, Petersen Michael Mørk, Henriksen Trine, Jurca Ales, Boedtker Soeren, Balslev-Clausen Andreas, Harsted Steen
Department of Orthopedic Surgery, Copenhagen University Hospital, Rigshospitalet; Copenhagen University Hospital, Hvidovre, Denmark.
Department of Orthopedic Surgery, Copenhagen University Hospital, Rigshospitalet, Denmark.
Acta Orthop. 2025 May 1;96:363-370. doi: 10.2340/17453674.2025.43478.
We aimed to update reference intervals for anthropometric parameters for the passive joint range of motion (ROM), rotational profile, and angular alignment of the lower limb in typically developing children (TDC), to compare the association of the variables age, left-right sidedness, body mass index (BMI), and sex.
We conducted a cross-sectional study in a convenience sample of TDC from the 1st, 5th, and 9th grades (6-17 years) in a randomized selection of Danish primary schools. We examined the anthropometric parameters in a non-clinical setting. Descriptive statistics were used to characterize the data. To explore potential differences across the variables, we utilized Bonferroni-corrected Welch's 2-sample t-tests, one-way analysis of means, and univariable linear regression.
We analyzed the associations between the variables and the anthropometric parameters in 501 TDC, aged 6 to 17 years. We found a statistically significant, but not clinically meaningful decrease in ROM for the hip, knee, and ankle as well as decreased femoral anteversion and increased tibial torsion with increasing age, but no association with sex or sidedness. However, several associations between BMI and ROM measurements were statistically significant and potentially clinically meaningful, with ROM decreasing by approximately 0.4° to 1.2° per unit increase in BMI, particularly for hip, knee, and ankle flexion movements.
Anthropometric parameters remain clinically stable after 7 years of age and are affected only by the BMI but not sex or age. We found a statistically significant but not clinically relevant decrease in torsion and joint ROM with increasing age.
我们旨在更新正常发育儿童（TDC）下肢被动关节活动范围（ROM）、旋转轮廓和角度对线的人体测量参数参考区间，比较年龄、左右侧别、体重指数（BMI）和性别的变量关联。
我们在丹麦小学随机选取的1、5、9年级（6 - 17岁）TDC便利样本中进行了一项横断面研究。我们在非临床环境中检查人体测量参数。描述性统计用于描述数据。为探索变量间的潜在差异，我们使用了经Bonferroni校正的Welch两样本t检验、单因素均值分析和单变量线性回归。
我们分析了501名6至17岁TDC中变量与人体测量参数之间的关联。我们发现随着年龄增长，髋、膝和踝关节的ROM有统计学显著但无临床意义的下降，以及股骨前倾减小和胫骨扭转增加，但与性别或侧别无关。然而，BMI与ROM测量之间的几种关联具有统计学显著性且可能具有临床意义，BMI每增加一个单位，ROM下降约0.4°至1.2°，尤其是髋、膝和踝关节的屈曲运动。
人体测量参数在7岁后在临床上保持稳定，仅受BMI影响，不受性别或年龄影响。我们发现随着年龄增长，扭转和关节ROM有统计学显著但无临床相关性的下降。
