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Table 2 Distribution of VTE risk factors in DVT patients

From: Comparison of rivaroxaban and parnaparin for preventing venous thromboembolism after lumbar spine surgery

VTE risk factor

DVT cases

Total cases enrolled (665)

Ratio of DVT incidence 2.4 %

Rivaroxaban group (6)

LWMH group (10)

Sum (16)

Age ≥60 years old

5

7

12

298

4.0 %

BMI ≥30 kg/m2

3

6

9

304

3.0 %

Thrombophilia

4

4

6

201

3.0 %

Diabetics

1

1

2

55

3.6 %

Hypertension

0

1

1

65

1.5 %

Hyperlipidemia

0

0

1

20

5.0 %

Diabetics/hypertension/hyperlipidemia

2

0

2

32

6.3 %

Spinal tumor

1

2

3

29

10.3 %

Previous history of phlebothrombosis

1

0

1

7

14.3 %

Anterior or combined anterior–posterior surgery

0

1

1

16

6.3 %

Spinal trauma

2

3

5

86

5.8 %

Without nerve injury

0

1

1

55

1.8 %

With nerve injury

2

2

4

31

12.9 %