Table 3.

Unificatory analyses of association between prognostic factors and overall survival (After PSM).

characteristics	n		median survival time (months)	1-year os (%)	2-years os (%)	X2	P
Age (years)
<65	70		20	72.9	30.0	0.907	0.584
≥65	44		22	70.5	38.6
Gender
Male	88		21	72.7	30.7	1.221	0.912
Famale	26		19	69.2	42.3
Smoking
No	67		19	65.7	29.9	0.887	0.261
Yes	47		27	80.9	38.3
Pathological pattern
squamous carcinoma	77		19	70.1	29.9	1.696	0.098
adenocarcinoma	25		31	76.0	44.0
else	12		22	75.0	33.3
Weight loss
<5%	83		22	75.9	34.9	0.354	0.375
≥5%	31		16	61.3	29.0
KPS
>80	106	20		69.8	31.1	3.294	0.965
≤80	8	27		100.0	62.5
T classification
T1-2	31	25		83.9	35.5	0.089	0.009
T3-4	83	19		67.5	32.5
N classification
N0-1	27	22		85.2	37.0	0.218	0.363
N2-3	87	19		67.8	32.2
Stages
IIb	11	22		90.9	27.3	5.986	0.015
IIIa	23	27		87.0	47.8
IIIb	40	24		70.0	35.0
IIIc	17	13		58.8	11.8
IV	23	14		60.9	34.8
Chemotherapy
No	44	16		61.4	31.8	0.074	0.202
Yes	70	24		78.6	34.3
Atelectasis
No	57	25		75.4	38.6	1.421	0.004
Yes	57	17		68.4	28.1
Lung re-expansion
No	41		14	65.9	22.0	3.882	0.008
Yes	16		28	75	43.8