Table 1:

Comparison of CBF-related parameters between 2 time points in surgical and nonsurgical brain hemispheres

Index	Surgical				Nonsurgical
Index	Before Operation	Last Follow-Up	% Variance	P^{^a}	First MRI	Last Follow-Up	% Variance	P^{^a}
Central nCBF (mean)	1.806 ± 1.001	1.107 ± 0.835	−33.8%	<.001^{^b}	1.820 ± 0.916	1.856 ± 0.863	10%	.732
Cortical nCBF (mean)	1.224 ± 0.693	2.811 ± 2.298	152.1%	<.001^{^b}	1.328 ± 0.663	1.363 ± 0.612	12.1%	.627
Mean nCBF	1.515 ± 0.814	1.959 ± 1.474	47.4%	.081	1.574 ± 0.777	1.610 ± 0.725	11%	.765
hdSD (mean)	1.515 ± 0.364	0.454 ± 0.239	−68.8%	<.001^{^b}	1.359 ± 0.233	1.342 ± 0.241	−1.2%	.117

↵a Significance level of paired t test analysis used to compare CBF-related parameters at 2 time points.
↵b Significant.