Table 2.

Survival analysis for patients with mean and maximal tumor perfusion below and above the cutoff value

Parameter	IDH-mutant astrocytoma	IDH wild-type astrocytoma	Oligodendroglioma
Mean tumor perfusion
Total number, </> cutoff value	14/–	9/12	7/9
PFS rate, </> cutoff value	0.79/–	0.22/0.83	0.86/0.89
p value	–	0.02	0.87
Hazard ratio (95% CI)	–	5.6 (1.3–37.9)	1.3 (0–32.0)
Maximal tumor perfusion
Total number, </> cutoff value	11/3	3/18	8/8
PFS rate, </> cutoff value	0.82/0.67	0/0.67	0.88/0.88
p value	0.63	0.01	0.87
Hazard ratio (95% CI)	0.6 (0.1–12.0)	5.1 (1.1–19.7)	10.8 (0–20.0)

IDH isocitrate dehydrogenase, PFS rate progression-free survival rate after 1 year, CI confidence interval