Table 2 Logistic regression model concerning lymph node, tumor size, aggressiveness and vascular invasion with epidemiological and clinicopathological characteristics, protein expression and trace elements.

Smoking

Yes/no^a

  OR

3.38

–

–

–

 CI 95%

0.81–14.09

 p value

0.093

Tumor size

≥ pT3/≤ pT2^a

 OR

–

–

–

2.31

 CI 95%

0.62–8.58

 p value

0.211

Vascular invasion

Present/absent^a

 OR

47.16

–

15.67

–

 CI 95%

8.35–266.17

1.49–164.3

 p value

< 0.001

0.022

Perineural invasion

Present/absent^a

 OR

–

–

–

10.30

 CI 95%

2.74–38.60

 p value

0.001

Trx nuclear

High/low^a

 OR

1.14

–

–

–

 CI 95%

0.256–5.11

 p value

0.861

SOD-1 cytoplasmic

High/low^a

 OR

–

4.63

–

2.81

 CI 95%

1.12–19.08

0.28–28.34

 p value

0.034

0.380

Trx cytoplasmic

High/low^a

 OR

–

3.00

–

–

 CI 95%

1.09–8.24

 p value

0.033

Ref-1 nuclear

High/low^a

 OR

–

6.12

–

–

 CI 95%

1.14–32.83

 p value

0.034

Potassium

Present/absent^a

 OR

–

–

0.15

–

 CI 95%

0.01–2.04

 p value

0.158