Table 3 Comparison of caprini risk factors between non-DVT group and DVT group

Age^†

 ≤ 40 yrs

-

5, (0.29)

0, (0.00)

0.012*

41–60 yrs

1

241, (14.11)

6, (6.00)

61–74 yrs

2

1098, (64.29)

61, (61.00)

 ≥ 75 yrs

3

364, (21.31)

33, (33.00)

Visible varicose veins

1

45, (2.63)

2, (2.00)

0.698

History of inflammatory bowel disease

1

2, (0.12)

0, (0.00)

0.732

Swollen legs (current)

1

2, (0.12)

1, (1.00)

0.035*

BMI, 25–40 kg/m²

1

1189, (69.61)

60, (60.00)

0.043*

Lung disease (eg, emphysema or COPD)

1

17, (1.00)

0, (0.00)

0.316

Other risk factors (< 1 mo)

BMI, ≥ 40 kg/m²

1

6, (0.35)

0, (0.00)

0.553

Smoking

1

71, (4.16)

2, (2.00)

0.287

Diabetes requiring insulin

1

45, (2.63)

4, (4.00)

0.414

For women only

Current use of birth control or hormone replacement therapy(HRT)

1

4, (0.23)

0, (0.00)

0.628

Current or past malignancies

2

57, (3.34)

3, (3.00)

0.855

History of blood clots

3

9, (0.53)

7, (7.00)

 < 0.001*

Total score^‡

-

2.96 ± 0.96

3.28 ± 1.33

0.022*