Influential factors for hip varus after internal fixation of intertrochanteric fracture

Gou Cheng-guo

doi:10.3969/j.issn.2095-4344.2015.35.016

Abstract：BACKGROUND:Hip varus is likely to occur after internal fixation of intertrochanteric fracture. There are less studies on influential factors of hip varus after internal fixation. OBJECTIVE:To explore the influential factors of hip varus after internal fixation of intertrochanteric fracture. METHODS:Eighty patients with femoral fracture undergoing internal fixation treatment were selected. Single factor analysis and Logistic regression analysis were performed. Whether hip varus occurred or not served as dependent variable, and independent variables included age, sex, body mass index, fracture classification, bone mineral density, time from injury to internal fixation, internal fixation method, lesser trochanter restoration, postoperative weight-bearing time. RESULTS AND CONCLUSION:Al the patients were fol owed up for over 6 months postoperatively. Twelve patients had postoperative hip varus with an incidence rate of 15%. Hip varus occurred within 1-4 months after operation, with a mean coxa vara angle of 99.1° (94°-107°). Fracture classification, bone mineral density, postoperative weight-bearing time were influential factors for hip varus in patients with femoral fracture undergoing internal fixation (P<0.05). But age, sex, body mass index, time from injury to surgery, internal fixation method and lesser trochanter restoration were not influential factors (P>0.05). Logistic regression analysis showed that fracture classification, bone mineral density, postoperative weight-bearing time were independent risk factors for the occurrence of hip varus after internal fixation of intertrochanteric fracture.