Table 3 Univariate and multivariate logistic regression analyses of predictors of positive resection margin

Age, y

0.98 (0.94, 1.03)

0.489

Sex

Male

0.69 (0.23, 2.12)

0.519

Female

1.0

Resection

0.22

NS

S-PD

1.0

c-PD

4.31 (1.29, 14.37)

0.017

IMV

0.52 (0.06, 4.65)

0.557

ASA score

0.721

1

1.0

2

1.62 (0.46, 5.56)

0.450

3

1.58 (0.35, 7.18)

0.553

Length of vein resection,

1.01 (0.92, 1.11)

0.764

Blood loss, mL

1.003 (1.001, 1.004)

<0.001

1.003 (1.001, 1.004)

<0.001

Blood loss 500 mL

NS

Yes

3.30 (0.98, 11.11)

0.054

No

1.0

Blood transfusion

NS

Yes

5.0 (1.48, 16.91)

0.010

No

1.0

Neural invasion

NS

Present

3.30 (0.98, 11.11)

0.054

Absent

1.0

Vascular invasion

NS

Present

6.51 (1.40, 30.30)

0.017

Absent

1.0

Lymph node metastasis

NS

Present

4.49 (1.33, 15.15)

0.016

Absent

1.0

Tumor differentiation

2.43 (0.66, 8.88)

0.181

Overall stage ^b

4.20 (1.45, 12.10)

0.008

4.46 (1.31, 15.17)

0.017