4.

Ⅲa-N2期手术患者OS的影响因素分析

Influencing factor analysis of OS of stage Ⅲa-N2 surgical patients

Factor		OS (month)	95%CI	χ2	P
*: Have two cases lost in this factor analysis. #: Have nine cases lost in this factor analysis.
Maximum diameter of tumor*				5.946	0.015
	< 4 cm	42.7	23.17-62.29
	≥4 cm	28.4	21.03-35.83
Number of involved mediastinal lymph nodes#				1.111	0.292
	< 3	42.7	25.34-60.12
	≥3	33.8	11.38-56.28
Number of involved mediastinal lymph node stations#				0.986	0.321
	1	36.1	24.21-47.99
	≥2	48.3	26.22-70.32
Positive subcarinal lymph node#				0.905	0.341
	No	44.0	14.15-73.91
	Yes	33.8	22.13-45.53
Auxillary chemotherapy				20.162	＜0.001
	No	19.8	16.00-23.66
	Yes	48.3	36.28-60.26
Auxillary radiotherapy				2.414	0.120
	No	40.7	14.88-66.46
	Yes	30.4	15.68-45.12
Histology				8.200	0.004
	Squamous	28.4	15.32-41.54
	Non-squamous	48.3	31.15-66.40