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| Variable | Category | HR | 95% CI | P value |
|---|---|---|---|---|
| Smoking history | 1 = Yes, 2 = No | 1.54 | 1.13–2.12 | 0.007 |
| Pathological stage | PTa-2 vs. PT3-4 | 2.08 | 1.43–3.02 | <0.001 |
| Adenocarcinoma | Yes = 1, No = 0 | 1.49 | 1.00–2.20 | 0.048 |
| Margin status | Positive = 1, Negative = 2 | 1.99 | 1.30–3.05 | 0.002 |
HR, hazard ratios.
