Table 3. Disease free survival stratified by selected factors and covariates.

Factor	Cut off	N (total)	N (events)	5-years survival	Log Rank Test
age	< 65	40	20	0.469	0.392
	> 65	34	14	0.653	-
gender	male	53	23	0.564	0.800
	female	21	11	0.524	-
histology	adenocarcinoma	22	12	0.496	0.589
	not specified	2	1	-	-
	squamous	46	19	0.599	-
	giant cell	4	2	0.333	-
stage	I B	19	7	0.684	0.352
	II A	8	4	0.625	-
	II B	22	9	0.538	-
	III A	25	14	0.415	-
smoking	ex-smoker	23	12	0.466	0.579
	smoker	45	19	0.578	-
	non-smoker	6	3	0.667	-
type of surgery	bilobectomy	8	6	0.375	0.128
	lobectomy	50	21	0.593	-
	pneumonectomy	16	7	0.506	-
early treatment termination	yes	10	5	0.467	0.746
	no	64	29	0.567	-
% intensity NVB i.v.	< 100%	29	12	0.584	0.644
	= 100%	45	30	0.544	-
% intensity NVB p.o.	< 100%	61	39	0.598	0.253
	= 100%	13	8	0.412	-
% intensity CBDCA.	< 100%	42	29	0.624	0.809
	= 100%	32	14	0.521	-