TABLE 2:

Normal reference values for the V_MCA/V_ICA index by age group

V_MCA/V_ICA Index	Age Group				Between-Group Differences
V_MCA/V_ICA Index	All	I (<40 y)	II (40–60 y)	III (>60 y)	Between-Group Differences
All subjects (n = 304)
Peak systole	1.73 (0.72–2.74)^*	1.68 (0.76–2.60)	1.78 (0.76–2.80)	1.77 (0.60–2.94)	Not significant
Mean	1.91 (0.81–3.01)	1.88 (0.86–2.90)	1.96 (0.84–3.10)	1.90 (0.67–3.13)	Not significant
End diastole	1.99 (0.73–3.15)	1.94 (0.80–3.08)	2.06 (0.65–3.47)	2.00 (0.68–3.32)	Not significant
Women (n = 193)
Peak systole	1.70 (0.74–2.66)^*	1.62 (0.76–2.44)^†	1.78 (0.96–2.60)	1.89 (0.51–3.27)	I vs III^‡
Mean	1.87 (0.82–2.92)^*	1.82 (0.88–2.76)^†	1.91 (0.94–2.88)	2.06 (0.59–3.53)	I vs III^‡
End diastole	1.93 (0.78–3.08)^*	1.86 (0.84–2.88)^†	1.96 (0.82–3.10)	2.17 (0.66–3.68)	I vs III^‡
Men (n = 111)
Peak systole	1.77 (0.69–2.85)	1.85 (0.82–2.88)	1.78 (0.53–3.01)	1.68 (0.72–2.64)	Not significant
Mean	1.98 (0.80–3.16)	2.10 (0.96–3.24)	2.04 (0.71–3.37)	1.78 (0.81–2.75)	Not significant
End diastole	2.08 (0.66–3.50)	2.20 (0.83–3.57)	2.19 (0.51–3.87)	1.86 (0.85–2.87)	Not significant

* Age dependence, P < .001.
† Sex dependence, P < .05.
‡ P < .05.