Table 4.

Prognostic homogeneity comparison between 8^th AJCC staging system and our staging system in training set

	8th AJCC-IA		8th AJCC-IB		8th AJCC-IIA		8th AJCC-IIB		8th AJCC-III
	n	MS	n	MS	n	MS	n	MS	n	MS	p-value
RPA-I	488	47
RPA-II			946	27			315	26	42	30	p=0.406
RPA-III	35	16	184	20	356	20	1447	20	354	18	p=0.460
RPA-IV					49	13	554	14	571	16	p=0.600
RPA-V							136	10	459	13	p=0.119
p-value	P<0.001		p<0.001		p=0.001		p<0.001		p<0.001

Abbreviations: AJCC= American Joint Committee on Cancer; MS=median survival; RPA=recursive partitioning analysis.