2.

Ⅲa期手术与非手术组总生存期

Overall survival of surgical and non-surgical groups of stage Ⅲa

Stage		Group	n	OS (month)	95%CI	χ2	P
Ⅲa	Total					4.172	0.041
		Surgery	152	38.9	26.83-51.03
		Non-surgery	36	21.8	8.93-34.61
Ⅲa	T4N0/T3-4N1					0.808	0.369
		Surgery	44	48.7	12.78-84.56
		Non-surgery	13	20.1	12.95-27.19
	T1-3N2					2.583	0.108
		Surgery	108	38.9	26.74-51.12
		Non-surgery	23	30.8	12.50-49.04