Table 3.

Analysis of the RPA Classes

	I 2	HZ	95% CI	p
OS of RPA III	<0.001	0.816	0.514–1.298	0.391
PFS of RPA III	<0.001	0.671	0.494–0.912	0.011
PFS of RPA IV	59.664	0.688	0.597–0.794	0.000
PFS of RPA V	39.149	0.799	0.629–1.015	0.066

OS, overall survival; PFS, progression-free survival; HZ, hazard ratio; CI, confidence interval; RPA, recursive-partitioning analysis.