ObjectiveTo investigate the risk factors of lower extremity deep venous thrombosis(LDVT) in elderly patients with femoral neck fracture after operation.

MethodsThe medical records of femoral neck fracture elderly patients treated with surgical treatment were retrospectively analyzed.The independent risk factors of postoperative LDVT were analyzed using the univariate and logistic regression analysis, and the correlation prediction model was established.

ResultsThe body mass index ≥24 kg/m², diabetes mellitus, total cholesterol(TC)>5.69 mmol/L, triacylglycerol(TG) >1.8 mmol/L, operation time ≥60 min, intravenous inhalation combined anesthesia and operation waiting time ≥5 d were the independent risk factor of postoperative LDVT in elderly patients with femoral neck fracture(P < 0.05 to P < 0.01).The results of model verification in predicting postoperative LDVT in elderly patients with femoral neck fracture showed that the results of H-L deviation test were χ²=3.71 and P>0.05, and the C-index was 0.904(95%CI: 0.869-0.939), which indicated that the prediction model of line chart had good accuracy and differentiation.

ConclusionsThe independent risk factors of postoperative LDVT in elderly patients with femoral neck fracture.The prediction model has accurate prediction ability and differentiation, and high clinical application value.