Effect of the proximal femur geometry on the risk of facture in female patients with osteoporotic hip facture

JIN Yan-li; MIAO Qiang; LIU Tao; XUE Jian-li

doi:10.3969/j.issn.1009-4237.2018.03.008

Abstract：Objective To investigate the influence of proximal femur geometry on fracture risk in female patients with osteoporotic fracture of femur,and to explore whether the proximal femoral geometry is a risk factor closely related to hip fracture.Methods The study was carried out based on 171 women who were at least 65 years old and hospitalized with osteoporotic hip fractures from May 2013 to Jul.2016 in Yan'an People's Hospital. They were taken as trial group,including 97 cases of femur neck fractures and 74 cases of intertrochanteric fractures. The 386 female patients with osteoporosis were taken as control group,who were treated in our hospital during the same time.Femur bone mineral density(BMD)and proximal femoral geometry for all subjects were measured with dual energy X-ray absorptiometry,and compared between the two groups.Furthermore,the correlation between the geometric structure of the proximal femur and the two kinds of hip fractures were analyzed.Results The trial group and control group had significant differences in weight,cross-sectional area,length,width of femoral neck and BMD of proximal femur(P<0.05).What's more,the BMD of proximal femur in the control group was much higher than that in the trial group.For the femoral neck fractures group,regardless of BMD,the odds ratio for fractures in the cross-sectional area and neck length of femur were decreased by 1.98 times and 1.72 times,respectively,while the odds ratio for fracture were increased by 1.52 times in the femoral neck width.For intertrochanteric fracture group,the odds ratio for fractures were increased by 1.44 times in the femoral neck width regardless of BMD.Conclusion The femoral neck width is an independent risk factor associated with female hip fractures in addition to bone density.