Table 3 Diagnostic accuracy of using Wells score and Caprini score for preoperative DVT

  ≥ 1

2.42 (0.63–9.29)

0.20

80.0

37.7

20.0

90.6

  ≥ 2

3.62 (1.13–11.54)

0.03*

46.7

80.5

31.8

88.6

  ≥ 3

11.69 (0.99–138.44)

0.05*

13.3

98.7

66.7

85.4

  ≥ 11

2.84 (0.34–23.56)

0.33

93.3

16.9

17.9

92.9

  ≥ 12

7.56 (0.94–60.64)

0.05*

93.3

35.1

21.9

96.4

  ≥ 13

4.00 (1.27–12.61)

0.02*

60

72.7

30

90.3

  ≥ 14

2.16 (0.50–9.30)

0.3

20

89.6

27.3

85.2