Abstract:Methods Forty patients with femoral neck fractures who underwent hip arthroplasty at Yiyang Central Hospital Affiliated to Hunan University of Traditional Chinese Medicine from July 2022 to July 2023 were included and divided into the PLA group (n = 25) and the DAA group (n = 15). The general characteristics, operative duration and intraoperative blood loss were compared between the two groups. The levels of coagulation-related markers TAT, PIC, and TM were measured, and their predictive value was analyzed using the receiver operating characteristic (ROC) curve.Results There was no difference in the general characteristics between the two groups (P > 0.05). The operative duration in the DAA group was longer than that in the PLA group (P < 0.05), and the intraoperative blood loss in the DAA group was less than that in the PLA group (P < 0.05). Comparison of the TAT, PIC, and TM values of the DAA group and the PLA group before surgery and 1, 3, and 5 d after surgery showed that they were different among the time points (P < 0.05) and between the groups (P < 0.05), with the DAA group having lower TAT, PIC, and TM values, indicating a relatively lower risk of thrombosis. Besides, there were statistically significant differences in the change trends of TAT, PIC, and TM values between the two groups (P < 0.05). The ROC curve analysis indicated that the areas under the curves of TAT, PIC, TM, and their combination for predicting thrombosis after total hip arthroplasty were 0.831 (95% CI: 0.688, 0.973), 0.707 (95% CI: 0.540, 0.873), 0.756 (95% CI: 0.588, 0.924) and 0.851 (95% CI: 0.710, 0.992), with the sensitivities being 80.0% (95% CI: 0.924, 0.676), 66.7% (95% CI: 0.813, 0.521), 73.3% (95% CI: 0.869, 0.597), and 80.0% (95% CI: 0.676, 0.924), and the specificities being 64.0% (95% CI: 0.491, 0.789), 60.0% (95% CI: 0.448, 0.752), 68.0% (95% CI: 0.535, 0.825), and 72.0% (95% CI: 0.581, 0.859). The combination of the three markers yielded a higher predictive value.Conclusions The risk of thrombosis is relatively lower with the DAA. Combined detection of TAT, PIC, and TM offers greater predictive value in assessing the risk of thrombosis after total hip arthroplasty.Objctive To explore the expression levels of coagulation-related markers TAT, PIC, and TM after total hip arthroplasty via the direct anterior approach (DAA) and the posterior lateral approach (PLA), and to determine their predictive values for the risk of thrombosis.