Table 2. Comparison of perfusion values between patients with different statuses of 2-year survival.

Perfusion values	2-year survival		P value
	< 2 year (n = 30)	> 2 year (n = 21)
rCBVmean of nonenhanced tumor (ratio)	2.55 +/- 1.07	1.69 +/- 0.72	0.01
rCBVmean of enhanced tumor (ratio)	3.78 [3.09–4.7]	3 [1.4–4.75]	0.206
rCBVmean of whole tumor (ratio)	3.54 [2.13–4.24]	1.87 [1.46–2.8]	0.013
rCBV5%max (ratio)	9.18 [6.36–11.22]	4.75 [3.99–7.74]	0.002
rCBV10%max (ratio)	7.78 [5.96–9.91]	4.1 [3.51–6.64]	0.002
rCBVhigh_perfusion (ratio)	6.75 [4.73–10.39]	2.7 [2.1–3.94]	<0.001
rCBVvariation_mean of nonenhanced tumor	13.55 +/- 7.82	11.21 +/- 5.93	0.344
rCBVvariation_mean of enhanced tumor	17.22 [12.17–22.95]	7.32 [6.16–10.69]	0.109
rCBVvariation_mean of whole tumor	14.59 +/- 9.01	11.97 +/- 7.38	0.59
rCBVvariation_max of nonenhanced tumor	41.27 [29.32–72.04]	41.95 [30.97–62.42]	0.917
rCBVvariation_max of enhanced tumor	59.38 +/- 32.60	32.58 +/- 18.51	0.026
rCBVvariation_max of whole tumor	55.35 [34.32–79.94]	42.77 [34.08–57.85]	0.227

Note: values are the mean +/- standard deviation or the median and [first quartile—third quartile]. rCBV_mean, mean rCBV; rCBV_5%max, 5% maximum rCBV; rCBV_10%max, 10% maximum rCBV; rCBV_{high_perfusion}, maximum rCBV; rCBV_{variation_mean}, mean rCBV variation; rCBV_{variation_max}, maximum rCBV variation.