Li Qi, Duan Wang-ping, Cao Xiao-ming, Guo Heng, Wang Lei, Wei Xiao-chun
Department of Orthopaedics, the Second Hospital of Shanxi Medical University, Taiyuan 030001, Shanxi, China.
Zhongguo Gu Shang. 2011 Nov;24(11):911-4.
To investigate the relationship between body mass index and lower limb alignment of patients with knee osteoarthritis.
From July 2008 to June 2010, 78 patients who suffered from severe knee osteoarthritis were treated with total knee replacement, including 17 males and 61 females, ranging from 41 to 85 years old, with an average age of 68.1 years. The Chinese average adult body mass index (BMI) classification standard was used to classify the patients into three groups: normal group, BMI<24.0, including 3 males and 11 females, totalized 14 patients (28 knees), with the mean age of (69.5 +/- 4.7); overweight group, 24.0 < or = BMI<28.0, including 4 males and 25 females, totalized 29 patients (58 knees), with the mean age of (66.4 +/- 7.9) years; and obese group, BMI > or = 28.0, including 10 males and 25 females, totalized 35 patients(70 knees), with the mean age of (69.1 +/- 8.3) years. The limb X-ray film measuring system was used to measure the lower limb alignment at the supine and weight-bearing position.
There were no statistical significances between the normal group and the overweight group in the knee varus angle at the supine and weight-bearing position (P>0.05). However, keen varus angle of the overweight group increased compared with the other two groups at the supine position,and the angle of the weight-bearing position increased nearly 2 degrees, but no statistical significance. There was no statistical significance between supine and weight-bearing position in the three groups of BMI, but the knee varus angle at the supine position was more than the weight -bearing position in the three groups.
The knee varus angle of obese patients with osteoarthritis in the weight-bearing position increases obviously. It indicates that obesity is an important factor increasing the angle of lower limb alignment.
探讨体重指数与膝关节骨关节炎患者下肢力线的关系。
选取2008年7月至2010年6月间78例行全膝关节置换术的重度膝关节骨关节炎患者，其中男性17例，女性61例，年龄41～85岁，平均年龄68.1岁。采用中国成年人平均体重指数（BMI）分类标准将患者分为三组：正常组，BMI<24.0，包括男性3例、女性11例，共14例（28膝），平均年龄（69.5±4.7）岁；超重组，24.0≤BMI<28.0，包括男性4例、女性25例，共29例（58膝），平均年龄（66.4±7.9）岁；肥胖组，BMI≥28.0，包括男性10例、女性25例，共35例（70膝），平均年龄（69.1±8.3）岁。采用肢体X线片测量系统测量患者仰卧位及负重位下肢力线。
正常组与超重组仰卧位及负重位膝关节内翻角度比较，差异无统计学意义（P>0.05）。然而，超重组仰卧位膝关节内翻角度较其他两组增大，负重位角度增加近2°，但差异无统计学意义。三组BMI仰卧位与负重位比较差异无统计学意义，但三组仰卧位膝关节内翻角度均大于负重位。
肥胖的骨关节炎患者负重位膝关节内翻角度明显增加。提示肥胖是增加下肢力线角度的重要因素。
