Table 4.

Analysis for PFS between predicted high- or low-risk group

	Low-risk, (n = 72)	High-risk, (n = 31)	p value
Median PFS (months) (95% CI)#	8.90 (7.48, 10.31)	4.40 (3.55, 5.25)	< 0.001
PFS rate in 3 monthsa	n = 67, 93.1%	n = 25, 81.0%	< 0.001
PFS rate in 6 monthsa	n = 52, 72.2%	n = 4, 12.9%	< 0.001
PFS rate in 12 monthsa	n = 18, 25.0%	n = 3, 9.6%	< 0.001

PFS progression-free survival, CI confidence interval

^#p Value was calculated by log-rank tests

^aData are reported as the number and percentage of patients, and p value was calculated by χ2 tests