Epidemiology and prognostic factors for new-onset deep venous thrombosis after unicompartmental knee arthroplasty: a retrospective study

Table 1 Optimal cut-off value and area under the curve (AUC) of variables in ROC analysis

Variables	Cut-off value	AUC	95%CI	P value
Age (year)	51.5	0.437	0.335–0.539	0.223
Disease duration (year)	8.5	0.598	0.508–0.690	0.057
Operation duration (min)	169	0.642	0.550–0.734	0.006‡
Intraoperative blood loss (ml) BMI (kg/m²)	102 26.7	0.636 0.670	0.522–0.750 0.583–0.756	0.008‡ 0.001‡
Preoperative- PLT (10⁹/L)	134	0.420	0.329–0.510	0.120
D dimer (mg/L)	0.29	0.655	0.566–0.745	0.003‡
Prothrombin time (s)	10.7	0.622	0.524–0.720	0.018‡
INR	0.98	0.614	0.516–0.711	0.027‡

‡, P < 0.05; BMI, body mass index; PLT, platelet count; INR, international normalized ratio

ISSN: 1471-2474