Table 1 Baseline information of the study objects

Age, year

49.44 ± 6.84

49.98 ± 7.05

0.612

Gender, n (%)

0.167

 Male

37 (43.53)

46 (54.12)

 Female

48 (56.47)

39 (45.88)

BMI, n (%)

0.524

 ≥ 25 kg/m²

33 (38.82)

29 (34.12)

 < 25 kg/m²

52 (61.18)

56 (65.88)

Hypertension, n (%)

0.607

 Yes

22 (25.88)

25 (29.41)

 No

63 (74.12)

60 (70.59)

Diabetes mellitus, n (%)

0.599

 Yes

7 (8.24)

9 (10.59)

 No

78 (91.76)

76 (89.41)

Hyperlipidemia, n (%)

0.679

 Yes

15 (17.65)

13 (15.29)

 No

70 (82.35)

72 (84.71)

Smoking, n (%)

0.167

 Yes

27 (31.76)

19 (22.35)

 No

58 (68.24)

66 (77.65)

Coagulation indicators, n (%)

 PT, s

17.96 ± 2.99

8.65 ± 1.26

< 0.001

 AT, µg/mL

125.06 ± 11.69

103.79 ± 9.01

< 0.001

 TT, s

20.19 ± 5.02

20.39 ± 4.36

0.782

 INR

0.97 ± 0.21

2.28 ± 0.57

< 0.001

 FIB, g/L

3.22 ± 0.61

5.34 ± 0.80

< 0.001

 D-dimer, ng/mL

131.54 ± 9.28

180.02 ± 13.71

< 0.001

Duration symptoms before diagnosis, weeks

-

 ≥ 2

-

19 (22.35)

 < 2

-

66 (77.65)

Varicose veins at diagnosis, n (%)

-

 Yes

-

27 (31.76)

 No

-

58 (68.24)

Localization of DVT, n (%)

-

 Calf vein

-

13 (15.29)

 Popliteal vein

-

33 (38.83)

 Femoral and iliac vein

-

39 (45.88)