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Table 2: Mean MTT in each region and ICA stage
ICA Stage r
1 (n = 6) 2 (n = 3) 3 (n = 9) 4 (n = 13) 5 (n = 6) 6 (n = 3)
Medial frontal 9.1 ± 3.1 10.8 ± 2.1 11.6 ± 2.9 13.8 ± 6.1 17.4 ± 3.3 14.7 ± 2.4 .52^†
Posterior frontal 8.6 ± 2.6 8.7 ± 1.0 11.8 ± 5.1 14.1 ± 5.0 20.0 ± 5.7 16.1 ± 4.8 .64^‡
Occipital 9.3 ± 2.8 9.3 ± 1.0 10.8 ± 2.6 11.7 ± 3.3 18.9 ± 2.9 15.4 ± 6.3 .58^‡
Basal ganglia 8.6 ± 2.8 7.4 ± 1.1 9.6 ± 2.9 10.7 ± 3.5 15.1 ± 3.8 14.4 ± 2.5 .58^‡
Note.— MTT indicates mean transit time; ICA, internal carotid artery.
* , P < .05;
† , P < .01;
‡ , P < .001; based on Spearman rank correlation test.

	ICA Stage						r
	1 (n = 6)	2 (n = 3)	3 (n = 9)	4 (n = 13)	5 (n = 6)	6 (n = 3)	r
Medial frontal	9.1 ± 3.1	10.8 ± 2.1	11.6 ± 2.9	13.8 ± 6.1	17.4 ± 3.3	14.7 ± 2.4	.52^†
Posterior frontal	8.6 ± 2.6	8.7 ± 1.0	11.8 ± 5.1	14.1 ± 5.0	20.0 ± 5.7	16.1 ± 4.8	.64^‡
Occipital	9.3 ± 2.8	9.3 ± 1.0	10.8 ± 2.6	11.7 ± 3.3	18.9 ± 2.9	15.4 ± 6.3	.58^‡
Basal ganglia	8.6 ± 2.8	7.4 ± 1.1	9.6 ± 2.9	10.7 ± 3.5	15.1 ± 3.8	14.4 ± 2.5	.58^‡