Du Jin-Qiang, Gao Yao-Zu, Zhang Zhi-Qiang, Wei Xiao-Chun
Department of Orthopaedics, 2nd Hospital of Shanxi Medical University, Taiyuan, China.
Zhongguo Gu Shang. 2014 Nov;27(11):916-9.
To study effects of body mass index (BMI) on postoperative outcome in patients with osteoarthritis after total knee arthroplasty (TKA).
The data of 148 patients with osteoarthritis who underwent TKA from June 2006 to May 2009 in our hospital and had complete follow-up data were analyzed restrospectively, including 29 males and 119 females, ranging in age from 39 to 89 years old, with an average age of 71.2 years old. According to BMI classification standard, all the patients were divided into 4 groups: non-obese group (BMI ≤ 25.0 kg/m2), had 38 patients (45 knees), including 9 males and 29 females, with a mean age of (70.0 ± 8.2) years old; overweight group (BMI 25.1 to 27.0 kg/m2), had 40 patients (48 knees), including 10 males and 30 females, with a mean age of (72.6 ± 7.4) years old; obesity group (BMI 27.1 to 30.0 kg/ m2), had 30 patients (43 knees), including 7 males and 30 females, with a mean age of (70.4 ± 6.0) years old; morbidly obesity group (BMI > 30.0 kg/m2), 33 patients (39 knees), including 3 males and 30 females, with a mean age of (71.7 ± 6.4) years old. The index such as Knee Society Score (KSS), anterior knee pain and patella cartilage damage during surgery were recorded before surgery and at the time of follow-up.
Postoperative KSS increased significantly compared to preoperative KSS, and the good rate reached to 97.1%. In the knee score, preoperative KSS and postoperative KSS had no significant differences among the four groups (preoperative P = -0.789; postoperative P = 0.133). However, compared with other groups, obesity group got the lowest preoperative function score (preoperative P = 0.036; postoperative P = 0.225). While the incidence of anterior knee pain was 9.7% (17/175), including 14 grade I and 3 grade II. There were no significant differences in incidence of anterior knee pain among four groups (χ2 = 0.764, P = 0.862). The average BMI of the patients with anterior knee pain was (27.4 ± 3.6) kg/m2, while the others' BMI was (27.5 ± 4.4) kg/m2. There was no statistically difference between two groups (t = -0.061, P = 0.951). There were no significant differences in patella cartilage damage among groups (χ2 = 7.070, P = 0.314).
The KSS increases in all the different groups. Those patients get the benefit from TKA, and the obese patients can receive a similar postoperative outcome as the non-obese ones.
研究体重指数（BMI）对全膝关节置换术（TKA）后骨关节炎患者术后结局的影响。
回顾性分析2006年6月至2009年5月在我院行TKA且有完整随访资料的148例骨关节炎患者的数据，其中男性29例，女性119例，年龄39至89岁，平均年龄71.2岁。根据BMI分类标准，将所有患者分为4组：非肥胖组（BMI≤25.0 kg/m²），38例（45膝），其中男性9例，女性29例，平均年龄（70.0±8.2）岁；超重组（BMI 25.1至27.0 kg/m²），40例（48膝），其中男性10例，女性30例，平均年龄（72.6±7.4）岁；肥胖组（BMI 27.1至30.0 kg/m²），30例（43膝），其中男性7例，女性30例，平均年龄（70.4±6.0）岁；病态肥胖组（BMI>30.0 kg/m²），33例（39膝），其中男性3例，女性30例，平均年龄（71.7±6.4）岁。记录术前及随访时的膝关节协会评分（KSS）、膝前疼痛及手术中髌骨软骨损伤等指标。
术后KSS较术前显著提高，优良率达97.1%。在膝关节评分方面，四组术前KSS和术后KSS无显著差异（术前P = -0.789；术后P = 0.133）。然而，与其他组相比，肥胖组术前功能评分最低（术前P = 0.036；术后P = 0.225）。膝前疼痛发生率为9.7%（17/175），其中I级14例，II级3例。四组膝前疼痛发生率无显著差异（χ² = 0.764，P = 0.862）。膝前疼痛患者的平均BMI为（
