Mohd-Karim M I, Sulaiman A R, Munajat I, Syurahbil A H
Department Of Orthopaedics, Universiti Sains Malaysia, Kubang Kerian, Malaysia.
Malays Orthop J. 2015 Jul;9(2):9-12. doi: 10.5704/MOJ.1507.005.
This study was conducted to find out the age when tibiofemoral angle starts to be in valgus and reaches maximum angle. The differences of the angles between genders were also studied.
This cross sectional study on tibiofemoral angle was conducted among 160 normal healthy children using clinical measurement method. The children between 2 18 months to 6 years old were assigned to 5 specific age groups of 32 children with equal sex distribution.
This study had shown a good inter-observer reliability of tibiofemoral angle measurement with intraclass correlation coefficient (ICC) of 0.87 with narrow margin of 95% confident interval (95% CI: 0.73, 0.94). The mean tibiofemoral angle for children at 2 , 3 , 4 , 5 and 6 years old were 2.25° (SD=0.53), 8.73° (SD=0.95), 7.53° (SD=1.40), 7.27° (SD=1.14) and 6.72° (SD=0.98) respectively. The age when they achieved maximum valgus tibiofemoral angle was 3 years old. The maximum mean (SD) tibiofemoral angle for boys, girls and all children were 8.91° (SD=1.17), 8.56° (SD=0.62) and 8.73° (SD=0.95)respectively. The mean tibiofemoral angle showed no statistically significant difference between girls and boys except for the 5-year-old group, in which the mean TF angle for girls was 7.560 (SD=0.95) and for the boys was 6.970 (SD=1.26) with p-value of 0.037.
Measurement of tibiofemoral angle using the clinical method had a very good inter-observer reliability. The tibiofemoral angle in Malay population was valgus since the age of 2 years with maximum angle of 8.730 (SD=0.95) achieved at the age of 3 years.
本研究旨在确定胫股角开始出现外翻并达到最大角度的年龄。同时也研究了不同性别之间角度的差异。
本横断面研究采用临床测量方法，对160名正常健康儿童的胫股角进行了研究。将218个月至6岁的儿童分为5个特定年龄组，每组32名儿童，性别分布均衡。
本研究显示胫股角测量具有良好的观察者间信度，组内相关系数（ICC）为0.87，95%置信区间较窄（95%CI：0.73，0.94）。2岁、3岁、4岁、5岁和6岁儿童的平均胫股角分别为2.25°（标准差=0.53）、8.73°（标准差=0.95）、7.53°（标准差=1.40）、7.27°（标准差=1.14）和6.72°（标准差=0.98）。他们达到最大外翻胫股角的年龄为3岁。男孩、女孩和所有儿童的最大平均（标准差）胫股角分别为8.91°（标准差=1.17）、8.56°（标准差=0.62）和8.73°（标准差=0.95）。除了5岁组外，女孩和男孩的平均胫股角在统计学上没有显著差异，5岁组中女孩的平均胫股角为7.560（标准差=0.95），男孩为6.970（标准差=1.26），p值为0.037。
采用临床方法测量胫股角具有很好的观察者间信度。马来人群的胫股角自2岁起呈外翻，3岁时达到最大角度8.730（标准差=0.95）。
