Table 4. Comparing the estimated 5-year survival and median survival times between the current study and the TNM classification and IASLC.

Stage	IASLC sixth edition	IASLC seventh edition	Current study seventh
IA*	73% (119)	73% (119)	83% (80-86, 142)
IB*	54% (70)	58% (81)	77% (71-82, 132)
IIA*	48% (54)	46% (49)	68% (58-76, 123)
IIB*	38% (33)	36% (31)	70% (61-78, 84)
IIIA*	25% (23)	24% (22)	62% (54-68, 72)
IIIB*	19% (16)	9% (13)	31% (19-44, 49)
IV*	21% (18)	13% (17)	54% (34-70, 84)

IASLC, International Association of the Study of Lung Cancer.

^*Estimated 5-year survival (95% confidence interval, median survival time, months).