2.

癌灶≤2 cm（T1a）的Ⅰ期NSCLC患者术后辅助化疗对生存的影响

Effects of postoperative adjuvant chemotherapy on the survival time of patients with tumor extent ≤2 cm (T1a) in stage Ⅰ NSCLC

Tumor differentiation	Adjuvant chemotherapy	n	Death	Long survival	Long survival rate
Poorly	Yes	2	0	2	100.0%
	No	16	7	9	56.3%
	All	18	7	11	61.1%
Moderately and well	Yes	5	2	3	60.0%
	No	50	5	45	90.0%
	All	55	7	48	87.3%
	Total	73	14	59	80.8%