2.

121例N2-Ⅲa期NSCLC患者单因素生存分析

Univariate analysis of N2-Ⅲa NSCLC patients for identifying prognostic factors

Items	n	Median survival time (mo)	Range	5-yr OS (%)	P
OS: overal survival; NA: not applicable.
Gender					0.402
Male	82	42.6	31.4-53.8	37.7
Female	39	63.1	57.1-69.1	55.4
Age (yr)					0.836
< 65	88	53.4	34.8-72.0	43.2
≥65	33	42.6	26.9-58.3	43.1
Smoking index					0.363
< 400	77	59.8	42.3-77.2	52.8
≥400	44	42.6	28.1-57.1	33.3
Perioperative chemotherapy					0.258
Yes	100	48.1	34.4-61.8	40.0
No	21	NA	NA	67.3
Incision					0.118
Minimally invasive	77	59.8	37.1-82.5	49.1
Thoracotomy	44	28.9	4.87-53.0	34.6
Histological type					0.057
Adenocarcinoma	88	59.8	45.8-73.8	47.4
Non-adenocarcinoma	33	26.7	7.2-46.3	34.5
Intravascular cancer					0.089
Yes	38	31.9	12.5-51.2	23.1
No	83	61.2	46.3-76.1	52.3
Tumor diameter (cm)					0.269
≤3	50	50.3	28.2-72.4	44.1
> 3	71	42.6	15.0-70.2	42.5
N2 level					0.001
Single N2	79	63.1	NA	58.3
Multiple N2	42	31.9	14.5-49.2	25.5
N2 classification					0.020
Ⅲa1/a2	42	63.8	NA	52.7
Ⅲa3/a4	79	37.5	24.0-50.9	38.4