Table 6 Univariate Cox proportional hazard regression analyses for skin exposure

Age (years)

51.71 ± 12.24

49.50 ± 10.13

0.57

Height (cm)

157.14 ± 6.41

156.64 ± 5.54

0.81

Weight (kg)

54.93 ± 8.72

56.60 ± 8.74

0.61

BMI (kg/m²)

22.14 ± 2.24

23.07 ± 3.39

0.47

PT (s)

11.60 ± 1.06

11.69 ± 1.17

0.83

APTT (s)

30.01 ± 4.32

31.24 ± 5.88

0.58

FIB (g/L)

3.75 ± 1.19

3.31 ± 0.89

0.19

ALB (g/L)

45.46 ± 5.70

45.04 ± 3.56

0.76

TG (mmol/L)

1.16 ± 0.61

1.33 ± 1.09

0.67

TC (mmol/L)

4.71 ± 0.87

4.86 ± 1.02

0.69

LDL-C (mmol/L)

3.10 ± 0.86

3.15 ± 0.95

0.88

Implantation depth (cm)

38.21 ± 3.49

36.98 ± 3.09

0.29

Operation time (min)

57.43 ± 23.89

43.64 ± 18.86

0.06

0.44

Hypertension

 Yes

2 (28.6%)

83 (17.2%)

 No

5 (71.4%)

399 (82.8%)

Diabetes

0.59

 Yes

1 (14.3%)

41 (8.5%)

0.14

 No

6 (85.7%)

441 (91.5%)

Incision type

 Puncture site incision technique

2 (28.6%)

280 (58.1%)

 Traditional tunnel needle technique

5 (71.4%)

202 (41.9%)

TNM stage (n)

 I

2 (28.6%)

52 (10.8%)

0.44

 II

1 (14.3%)

201 (41.7%)

 III

1 (14.3%)

162 (33.6%)

 IV

3 (42.9%)

67 (13.9%)

Access vein

 Basilic vein

4 (57.1%)

398 (82.6%)

0.69

 Cephalic vein

1 (14.3%)

51 (10.6%)

 Brachial vein

2 (28.6%)

33 (6.8%)