Correlation of internal carotid artery diameter and carotid flow with asymmetry of the circle of Willis

BMC Neurology

Table 2 ICA flow and diameter parameters for each group of COW variants

	All	Symmetric	A1 Asymmetry (AA group)					PcomA Asymmetry (PA group)
			AA1	AA2	AA3	Non-AA	Pvalue	PA1	PA2	PA3	Non-PA	Pvalue
Number of subjects	210	81 (38.6%)	19 (9%)	33 (15.7%)	15 (7.1%)	143 (68.1%)		15 (7.1%)	45 (21.4%)	18 (8.6%)	132 (62.9%)
ICA-PDF	6.9 ± 16.6	−0.1 ± 7.9	30.8 ± 22.4	17.4 ± 20.3	9.5 ± 16.4	1.0 ± 9.1	< 0.0001	7.3 ± 14.8	6.2 ± 13.3	7.3 ± 22.5	7.0 ± 17.0	0.993
ICA diameter difference (mm)	0.37 ± 0.32	0.22 ± 0.22	0.76 ± 0.33	0.55 ± 0.38	0.48 ± 0.38	0.26 ± 0.22	< 0.0001	0.40 ± 0.29	0.41 ± 0.34	0.40 ± 0.37	0.34 ± 0.31	0.655
ICA flow difference (ml/min)	65.9 ± 51.6	51.0 ± 38.8	124.6 ± 73.2	76.9 ± 45.8	76.2 ± 62.2	54.6 ± 42.0	< 0.0001	65.1 ± 47.3	64.0 ± 54.2	72.9 ± 53.4	65.6 ± 51.5	0.943
ICA flow difference percentage (%)	24.5 ± 17.8	19.6 ± 14.3	42.9 ± 24.1	30.7 ± 18.6	29.0 ± 19.0	20.2 ± 14.2	< 0.0001	25.0 ± 14.9	22.5 ± 16.0	25.5 ± 18.0	25.1 ± 18.7	0.852

ISSN: 1471-2377