Table 2.

Multivariate Cox proportional hazards model of disease-free survival.

Variable		HR	95% CI	P
Pathologic stage	IIA vs IB	2.718	1.498–4.930	0.001
	IIB vs IB	1.976	0.823–4.744	0.128
	IIIA vs IB	6.109	3.480–10.723	<0.001
Performance status	≥1 vs 0	0.62	0.445–0.864	0.005
Adjuvant radiotherapy	Yes vs No	0.684	0.481–0.972	0.034
Cycle	=4 vs < 4	1.337	0.799–2.238	0.268
	>4 vs < 4	2.477	1.208–5.082	0.013
Platinum/pemetrexed	Pem vs Other	0.759	0.563–1.023	0.07