Table 2. Survival analyses and p values of patients according to various prognostic factors.

Characteristics	n	%	Median	Range	p value	Median	Range	p value
			survival	(month)	(survival)	DFS	(month)	(DFS)
Age (year)
<70	121	84	43	36,6-49-6	0,12	44	36.3-51.6	0,31
≥70	23	16	29	17.8-39.2		35	21.2-48.3
TNM factor T2N2M0	39	27	26,3	18.3-34.7	0,04	26	18.3-34.4	0,04
Other	105	73	45,7	37.7-53.7		46	37.7-53.7
SUV of primary lesion on
PET/CT
0-≤3	9	6,3	78	67.7-89.7	0.01*	70,4	55.2-85.5	0.01†
3-≤9	48	33,3	47	37.4-57.3		40,1	29.7-50.5
>9	87	60,4	32	24.5-38.5		38	27.3-48.6
Histopathology
SCC-Adenocarcinoma	133	92,4	27	25.6-48.3	0,01	42,1	22.7-50.6	0,64
Other	11	7,6	17	4.8-28.1		36,7	34.9-49.4
Visceral pleura invasion
Nil	50	34,7	41	31.6-50.3	0,54	40	33.4-46.5	0,03
Yes	85	59	33	19.8-46.1		37	27.0-47.0
Parietal pleura invasion	9	6,3	24	7.0-40.9		10	4.4-15.5
Resection
Pneumonectomy	41	28,4	32	20.7-43.4	0,02	45	30.3-60.7	0,84
Other	103	71,6	45	38.1-51.9		41	33.1-48.7
DFS: Diseases free survival; TNM: Tumor, node, metastasis; SUV: Standard uptake value; PET-CT: Positron emission tomography-computed tomography; SCC: Squamous cell carcinoma; *, † The diseases free survival and overall survival of the patients with SUV value of primary lesion on PET/CT less than 3 was significantly better than others.