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Table 3 Multivariate analysis of overall survival and disease-free survival

From: The effect of metformin use on hypopharyngeal squamous cell carcinoma in diabetes mellitus patients

Comparison

Overall survival

Disease-free survival

OR(95% CI)

p

OR(95% CI)

p

Early stage

 DM vs. non DM

1.67 (0.17–2.59)

0.56

1.25 (0.33–4.73)

0.73

 DM (metformin) vs. DM (no metformin)

1.54 (0.32–7.22)

0.58

1.44 (0.09–2.14)

0.31

 DM (no metformin) vs. non DM

0.62 (0.12–3.06)

0.55

1.75 (0.34–8.79)

0.49

 DM (metformin) vs. non DM

1.95 (0.23–4.10)

0.96

1.78 (0.18–3.28)

0.73

Late stage

 DM vs. non DM

1.25 (0.53–2.93)

0.61

1.70 (0.29–1.67)

0.42

 DM (metformin) vs. DM (no metformin)

4.28 (1.45–12.65)

0.01*

1.23 (0.07–0.68)

0.01*

 DM (no metformin) vs. non DM

1.56 (0.18–1.66)

0.29

1.57 (0.52–4.71)

0.41

 DM (metformin) vs. non DM

2.40 (0.91–6.35)

0.07

1.36 (0.13–0.98)

0.04*

  1. * p < 0.05