Table 1.

Mean ± SD blood flow volume of intracranial artery by decade.

	20s	30s	40s	50s	60s	70<	P-value
Total number (Female:Male)	21 (15:6)	22 (15:7)	24 (14:10)	25 (20:5)	22 (15:7)	15 (7:8)
Left ICA	370 ± 91	356 ± 109	347 ± 113	384 ± 107	276 ± 113	310 ± 105	0.018
Right ICA	351 ± 100	348 ± 132	334 ± 78	340 ± 111	292 ± 154	312 ± 107	0.376
BA	205 ± 58	171 ± 68	196 ± 61	157 ± 63	128 ± 74	129 ± 45	<0.001
Left ACA (A1)	129 ± 42	133 ± 46	112 ± 56	139 ± 63	91 ± 44	96 ± 37	0.010
Right ACA (A1)	121 ± 60	108 ± 45	97 ± 38	95 ± 37	86 ± 53	95 ± 43	0.201
Left MCA	187 ± 41	164 ± 53	171 ± 47	174 ± 52	140 ± 65	165 ± 66	0.092
Right MCA	218 ± 59	177 ± 48	203 ± 68	184 ± 49	164 ± 77	162 ± 54	0.093
Left PCA (P1)	109 ± 30	75 ± 32	90 ± 33	86 ± 33	70 ± 39	72 ± 32	0.008
Right PCA (P1)	105 ± 39	101 ± 40	104 ± 48	86 ± 51	73 ± 38	60 ± 29	0.025
Left ACA (A2)	130 ± 56	106 ± 33	92 ± 28	102 ± 34	68 ± 30	73 ± 32	<0.001
Right ACA (A2)	104 ± 33	93 ± 38	95 ± 34	82 ± 31	67 ± 34	73 ± 36	0.003
Left PCA (P2)	121 ± 41	88 ± 37	101 ± 41	98 ± 34	66 ± 35	66 ± 27	<0.001
Right PCA (P2)	127 ± 36	101 ± 40	102 ± 27	108 ± 33	65 ± 37	76 ± 27	<0.001
ACoA	32 ± 36	26 ± 33	36 ± 36	41 ± 27	37 ± 35	10 ± 6	0.087
Left PCoA	17 ± 9	66 ± 69	48 ± 31	68 ± 28	47 ± 34	31 ± 35	0.011
Right PCoA	41 ± 40	69 ± 64	51 ± 30	85 ± 29	69 ± 38	72 ± 41	0.099
Total inflow volume	925 ± 201	875 ± 243	878 ± 190	881 ± 206	696 ± 276	751 ± 206	0.045
Total outflow volume #1	860 ± 189	746 ± 201	788 ± 213	761 ± 194	595 ± 231	581 ± 213	0.018
Total outflow volume #2	896 ± 178	748 ± 209	757 ± 187	742 ± 175	568 ± 244	614 ± 193	0.001
Left total outflow volume #1	426 ± 79	369 ± 94	374 ± 105	392 ± 118	296 ± 127	332 ± 114	0.022
Right total outflow volume #1	439 ± 140	389 ± 119	409 ± 127	363 ± 106	332 ± 157	303 ± 110	0.110
Left total outflow volume #2	454 ± 110	370 ± 102	362 ± 97	373 ± 93	273 ± 119	304 ± 109	<0.001
Right total outflow volume #2	454 ± 98	372 ± 116	396 ± 101	373 ± 90	295 ± 130	311 ± 97	0.001

P-value, probability value for the Kruskal-Wallis test among the three age groups Total inflow, combined CBFs of bilateral ICAs and BA Total outflow #1, combined CBFs of bilateral ACAs (A1), MCAs, and PCAs (P1) Total outflow #2, combined CBFs of bilateral ACAs (A2), MCAs, and PCAs (P2)