Table 2.

Clinical Risk Factors of Disease Progression in the EUELC Cohort

Factor	DF (n = 172)		PD (n = 126)		Hazard Ratio*	95% CI	P
	No. of Patients	%	No. of Patients	%
Sex
Male	155	59.6	105	40.4	1
Female	17	44.7	21	55.3	1.62	0.96 to 2.75	.07
Age, years
≤ 70	129	58.9	90	41.1	1
> 70	43	54.4	36	45.6	1.18	0.79 to 1.78	.42
pN
N0	134	66.3	68	33.7	1
N1, N2, Nx	38	40.0	57	60.0	2.11	1.45 to 3.07	< .001
pT
T1, T2	69	74.2	24	25.8	1
T3, T4	103	50.5	101	49.5	2.68	1.59 to 4.50	< .001
Smoking status
Former/never smoker	72	58.5	51	41.5	1
Current smoker	100	57.1	75	42.9	1.04	0.72 to 1.50	.84

Abbreviations: DF, disease free; EUELC, European Early Lung Cancer project; PD, progressive disease.

^*Fine and Gray hazard ratio and P value for disease progression risk.