Table 3.

Multivariable Cox regression for recurrence-free survival.

	Hazard ratio (95% confidence interval)	P value
Smoking
Non smoker	Reference
Prior smoker	1.43 (0.48–4.30)	0.524
Current smoker	6.69 (2.00–22.42)	0.002
Stage
0	Reference
1	1.28 (0.28–5.75)	0.747
2	10.66 (2.46–46.18)	0.002
3	20.89 (1.75–249.18)	0.016