4.

上纵隔淋巴结清扫对Ib期上叶NSCLC预后的分析

Univariate analyses according to removed superior mediastinal lymph node station

Station	Right upper lobe NSCLC			Station	Left upper lobe NSCLC
	n (%)	χ2	P		n (%)	χ2	P
#2		0.038	0.845	#4L		0.060	0.983
Removed	36 (47.4)			Removed	19 (26.8)
Unremoved	40 (52.6)			Unremoved	52 (73.2)
#3		0.062	0.803	#5		5.349	0.024
Removed	60 (78.9)			Removed	59 (83.1)
Unremoved	16 (21.1)			Unremoved	12 (16.9)
#4R		5.329	0.021	#6		0.142	0.706
Removed	53 (69.7)			Removed	29 (40.8)
Unremoved	23 (30.3)			Unremoved	42 (59.2)