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

BMC Neurology

Table 1 Subjects demographic data by Circle of Willis variants

	All	Symmetric^a	A1 Asymmetry (AA group)^b				PcomA Asymmetry (PA group)^c
			AA1	AA2	AA3	P-value	PA1^d	PA2	PA3	P-value
Number of cases	210	81 (38.6%)	19 (9%)	33 (15.7%)	15 (7.1%)		15 (7.1%)	45 (21.4%)	18 (8.6%)
Age (years)	53.9 ± 9.4	50.4 ± 9.3	52.6 ± 11.5	54.6 ± 10.1	49.9 ± 8.3	0.344	55.4 ± 7.9	53.3 ± 9.5	51.8 ± 7.0	0.507
Right-side			6 (31.6%)	8 (24.2%)	7 (46.7%)	0.311	10 (66.7%)	29 (64.4%)	14 (77.8%)	0.588
Sex
Female	77 (36.7%)	32 (39.5%)	7 (36.8%)	8 (24.2%)	4 (26.7%)	0.601	7 (46.7%)	15 (33.3%)	10 (55.6%)	0.262
Male	133 (63.3%)	49 (60.5%)	12 (63.2%)	25 (75.8%)	11 (73.3%)		8 (53.3%)	30 (66.7%)	8 (44.4%)
Height (cm)	165.2 ± 8.1	165.2 ± 8.7	166.7 ± 8.2	165.5 ± 6.6	166.1 ± 6.1	0.841	163.3 ± 7.8	165.6 ± 8.7	163.4 ± 7.6	0.494
Weight (Kg)	68.0 ± 13.2	69.6 ± 14.6	69.4 ± 13.7	65.8 ± 9.9	69.7 ± 13.7	0.428	64.9 ± 11.4	67.9 ± 13.5	64.5 ± 11.0	0.543
Heart rate (/min)	67.3 ± 10.0	66.8 ± 11.1	65.8 ± 10.4	68.3 ± 8.0	65.5 ±12.6	0.551	67.8 ± 8.2	68.4 ± 7.9	69.7 ± 12/0	0.820

^aSeven subjects with bilateral F-PCAs were excluded
^bTwenty-three patients in the AA group had PcomA asymmetry, including 2 PA1, 14 PA2, and 7 PA3
^cTwenty-three patients in the PA group had A1 asymmetry, including 5 AA1, 13 AA2, and 5 AA3
^dThirty-seven subjects with 45 F-PCA, with 20 right-side F-PCA, 9 left-side F-PCA, and 8 bilateral F-PCAs

ISSN: 1471-2377