摘要目的:探讨影响股骨转子间骨折手术疗效的相关因素。方法:采用回顾性病例系列研究分析2014年1月— 2016年12月上海市四家医院收治的424例股骨转子间骨折患者临床资料，其中男200例，女224例；年龄45～98岁[(77.8±10.5)岁]。以骨折愈合为判断指标，将患者分为正常愈合组和非正常愈合组。骨折正常愈合组326例，非正常愈合组98例，其中2例骨折不愈合。评估术后骨折愈合情况。记录患者性别、年龄、侧别、AO分型、Evans-Jesen分型、外侧壁厚度、内侧壁支撑、尖顶距及固定材料在股骨头的位置等资料。先对上述因素进行单因素分析，再将有统计学意义的因素引入Logistics回归进行多因素分析，筛选影响骨折愈合的主要因素。末次随访时依据髋关节功能Oxford评分评价髋关节功能。结果:所有患者获随访1～3年[(2.2±0.3)年]。单因素分析中两组AO分型、Evans-Jesen分型、内侧壁支撑、尖顶距和主钉位置比较差异有统计学意义( P<0.05)。多因素回归分析结果表明，骨折类型简单( OR＝1.030)、内侧壁存在( OR＝0.395)、尖顶距≤25 mm( OR＝0.266)和主钉位于股骨头中下方( OR＝0.986)与骨折正常愈合显著相关( P<0.05)。骨折正常愈合组的Oxford评分[(42.6±4.5)分]高于非正常愈合组[(35.4±3.2)分]( P<0.05)。 结论:股骨转子间骨折的稳定性是影响骨折愈合最重要的因素，内侧壁存在、控制尖顶距≤25 mm和主钉位置偏下有助于骨折愈合和髋关节功能恢复。

abstractsObjective:To investigate the factors affecting the outcome of surgical treatment for femoral intertrochanteric fractures.Methods:A retrospective case series study was conducted for 424 patients with intertrochanteric fractures admitted to four hospitals in Shanghai from January 2014 to December 2016. There were 200 males and 224 females, aged 45-98 years [(77.8±10.5)years]. Normal union was observed in 326 patients (normal union group), and abnormal union was founded in 98 patients including nonunion in 2 patients (abnormal union group). Data were recorded including the age, gender, injury side, AO classification, Evans-Jesen classification, thickness of femoral lateral wall, medial support, tip-apex distance, and screw position within the femoral head. Fracture healing was assessed. Univariate analysis was conducted to examine differences of the above factors between two groups, and Logistic regression was used to screen the main factors affecting fracture union. At the latest follow-up, the hip joint function was estimated according to the Oxford score system.Results:All patients were followed up for 1-3 years [(2.2±0.3)years]. Univariate analysis showed significant differences between two groups regarding the AO classification, Evans-Jesen classification, medial support, tip-apex distance, and screw position within the femoral head ( P<0.05). Multivariate regression analysis revealed that the simple fracture ( OR=1.030), medial support ( OR=0.395), tip-apex distance ≤25 mm ( OR=0.266) and inferior screw position ( OR=0.986) were significantly related to fracture union. The hip function in normal union group was (42.6±4.5)points, better than (35.4±3.2)points in abnormal union group ( P<0.05). Conclusion:The stability of intertrochanteric fracture is the most important factor for fracture union. The medial support, tip-apex distance ≤25 mm and inferior screw position are helpful to promote fracture healing and recovery of hip joint function.