Table 2.

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

characteristics	n	median survival time (months)	1-year os (%)	2-years os (%)	X2	P
Age (years)
<65	92	19	69.6	26.1	2.55	0.576
≥65	60	22	70.0	38.3
Gender
Male	120	20	69.2	28.3	1.787	0.819
Famale	32	19	71.9	40.6
Smoking
No	95	19	64.2	28.4	0.741	0.363
Yes	57	21	78.9	35.1
Pathological pattern
squamous carcinoma	106	19	67.9	28.3	1.262	0.159
adenocarcinoma	31	27	71.0	38.7
else	15	22	80.0	33.3
Weight loss
<5%	106	22	72.6	33.0	0.722	0.086
≥5%	46	14	63.0	26.1
KPS
>80	142	20	67.6	28.9	4.238	0.997
≤80	10	27	100.0	60.0
T classification
T1-2	37	23	81.1	35.1	0.407	0.021
T3-4	115	19	66.1	29.6
N classification
N0-1	36	24	83.3	38.9	1.402	0.184
N2-3	116	17	65.5	28.4
Stages
IIb	15	24	93.3	33.3	7.739	0.002
IIIa	29	27	82.8	44.8
IIIb	58	21	69.0	32.8
IIIc	22	12	54.5	9.1
IV	28	12	57.1	28.6
Chemotherapy
No	56	15	62.5	32.1	0.062	0.42
Yes	96	22	74.0	30.2
TRA
No	63	24	76.2	38.1	2.593	0.003
Yes	89	17	65.2	25.8
Lung re-expansion
No	66	14	63.6	22.7	3.753	0.006
Yes	23	28	69.6	34.8