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. 2017 Aug 23;8(14):2765–2773. doi: 10.7150/jca.19515

Table 4.

Comparison of prognostic homogeneity between the 7th and 8th AJCC schemes and the RPA staging scheme for the training set

Staging scheme RPA-IA RPA-IB RPA-IIA RPA-IIB RPA-III P valuea
No. Median survival No. Median survival No. Median survival No. Median survival No. Median survival
7th AJCC stage
IA 226 47 months - - - - - - - - -
IB - - 410 29 months - - - - - - -
IIA - - 236 26 months 821 20 months 308 16 months - - <0.001
IIB - - - - 489 20 months 2104 16 months 1116 14 months <0.001
P valueb - - 0.37 0.96 0.47 -
8th AJCC stage
IA 226 47 months 236 26 months - - - - - - <0.01
IB - - 298 32 months 821 20 months - - - - <0.001
IIA - - 112 21 months - - 308 16 months - - <0.01
IIB - - - - 367 22 months 2104 16 months - - <0.001
III - - - - 122 18 months - - 1116 14 months <0.01
P valuec - 0.15 0.62 0.43 -

AJCC, American Joint Committee on Cancer; RPA, recursive partition analysis

aComparison of overall survival within different RPA stages. Bold P values indicate statistical significance (i.e., P < 0.05).

bComparison of overall survival within different 7th AJCC stages. Bold P values indicate statistical significance (i.e., P < 0.05).

cComparison of overall survival within different 8th AJCC stages. Bold P values indicate statistical significance (i.e., P < 0.05).