Table 1.

Subject demographic information and number of subjects for each physiologic measure

Age range	20s	30s	40s	50s	60s	70s	80s
Total number of subjects recruited	40	22	33	35	40	40	22
Gender (female/male)	27/13	13/9	23/10	23/12	25/15	23/17	11/11
Education (years, mean ± standard deviation)	16.10 ± 2.39	17.27 ± 2.37	16.27 ± 2.79	17.46 ± 2.44	16.70 ± 2.52	16.10 ± 2.88	16.45 ± 2.48
MMSE (mean ± standard deviation)	28.50 ± 1.26	28.48 ± 1.36	28.57 ± 1.20	28.13 ± 1.15	27.70 ± 1.24	27.14 ± 1.40	27.14 ± 1.17
Number of hypertensive subjects	0	0	1	4	11	8	9
Number of subjects for global venous oxygenation (Yv)	40	22	33	35	40	40	22
Number of subjects for global CBF	40	22	33	35	40	40	22
Number of subjects for global CMRO2	40	22	33	35	40	40	22
Number of subjects for regional CBF	38	22	31	35	39	40	21
Number of subjects for regional CVR	33	15	22	26	22	24	10