Table 1.

The ICA VT and flow measurements of each age decade.

Age group		20–30	31–40	41–50	51–60	61–70	71–80	>80
		(n = 42)	(n = 32)	(n = 36)	(n = 34)	(n = 46)	(n = 32)	(n = 25)
Demographic data
Age		24.31 ± 2.97	34.88 ± 2.73	45.58 ± 3.02	54.91 ± 3.03	66.24 ± 3.16	73.4 ± 2.60	83.67 ± 2.46
Gender		14 M/ 28 F	10 M/ 22 F	15 M/ 21 F	10 M/ 24 F	17 M/ 29 F	10 M/ 22 F	10 M/ 15 F
Hypertension		0	1	2	4	11	9	7
BP		111/75	111/77	119/80	127/83	136/84	139/84	141/81
The VT measurements
TI	LICA	1.70 ± 0.37	1.72 ± 0.30	1.83 ± 0.43	2.09 ± 0.70	2.36 ± 0.69	2.59 ± 0.76	2.87 ± 1.04
	RICA	1.74 ± 0.43	1.89 ± 0.53	1.92 ± 0.53	2.22 ± 0.61	2.64 ± 0.98	2.57 ± 0.61	3.00 ± 0.79
BL	LICA	19.84 ± 7.37	21.77 ± 6.71	22.69 ± 7.01	28.44 ± 10.4	31.44 ± 10.45	36.26 ± 12.97	39.24 ± 13.48
	RICA	19.49± 7.44	24.54 ± 8.05	24.30 ± 6.37	31.1 ± 10.45	34.56 ± 12.93	35.05 ± 8.51	43.05 ± 10.6
ICM	LICA	2.37 ± 1.22	2.38 ± 1.01	3.18 ± 2.22	4.53 ± 2.69	5.25 ± 2.49	5.70 ± 2.74	6.22 ± 3.78
	RICA	2.73± 2.12	3.17± 1.87	3.51 ± 2.56	4.8 ± 2.79	6.02 ± 3.98	6.14 ± 3.03	6.68 ± 4.11
Flow measurements
Blood flux	LICA	286.37 ± 59.09	269.90 ± 46.10	246.26 ± 51.93	245.42 ± 56.47	222.71 ± 56.12	196.01 ± 62.71	191.82 ± 54.8
	RICA	275.43 ± 56.67	265.6 ± 49.56	258.88 ± 51.98	222.88 ± 56.54	213.47 ± 59.95	200.86 ± 52.16	199.06 ± 45.4
MaxV	LICA	36.17 ± 8.20	34.69 ± 9.33	34.7 ± 8.31	31.26 ± 8.4	25.93 ± 8.05	25.54 ± 6.88	22.07 ± 6.0
	RICA	36.61 ± 8.18	36.18 ± 8.04	37.22 ± 8.81	32.21 ± 9.42	26.81 ± 9.1	26.18 ± 5.86	25.19 ± 6.58

BP, blood pressure presenting as systolic/diastolic with 15 subjects' measurements missing. LICA, left internal carotid artery; RICA, right carotid artery; TI, tortuosity index; BL, bending length (mm); ICM, inflection count metric; Blood flux in ml/min; MaxV, maximum blood velocity, in cm/s.