Table 3.

Survival analysis by disease stage, according to the 7th edition of the IASLC TNM staging system

Disease stage	Number of patients	Median survival(days)	95% CI
Stage IA	12	476	302.86–649.14
Stage IB	28	518	272.98–763.02
Stage IIA	24	359	216.17–501.83
Stage IIB	25	369	151.94–586.06
Stage IIIA	162	337	286.41–387.59
Stage IIIB	136	277	214.96–339.04
Stage IV	377	236	220.39–251.61
Total	764	286	270.47–301.53
Stage IA + IB	40	512	419.03–604.97
Stage IIA + IIB	49	369	232.97–505.03
Stage IIIA	162	337	286.41–387.59
Stage IIIB	136	277	214.96–339.04
Stage IV	377	236	220.39–251.61
Total	764	286	270.47–301.53
Stage IA + IB	40	512	419.03–604.97
Stage IIA + IIB + IIIA	211	348	296.63–399.37
Stage IIIB	136	277	214.96–339.04
Stage IV	377	236	220.39–251.61
Total	764	286	270.47–301.53

Abbreviations: IASLC, International Association for the Study of Lung Cancer; CI, confidence interval; TNM, tumor, node, metastasis.