Table 3 Determination for risk factors for DFS or OS by multivariate tests

Smoking status

 Never

1

 Current + former

0.007*

2.10 (1.22–3.62)

Alcohol status

 Never

1

 Current + former

0.014*

2.75 (1.23–6.16)

TNM stages

 I

1

1

 II

 < 0.001*

4.72 (2.35–9.50)

 < 0.001*

8.90 (3.36–23.59)

 III

 < 0.001*

19.18 (9.49–38.78)

 < 0.001*

26.78 (10.13–70.83)

NSAIDs UI

 Low

1

 High

0.034*

0.52 (0.28–0.95)