Table 1:

Subject characteristics

Age Group (y)	N	Female (%)	Education (y; mean ± SD)	Age (y; mean ± SD)
20–30	18	56	15 ± 1.6	24 ± 3.6
31–40	17	53	17 ± 1.9	35 ± 3.4
41–50	19	58	17 ± 1.5	46 ± 2.6
51–60	19	58	17 ± 1.4	55 ± 2.6
61–70	18	50	16 ± 2.3	66 ± 2.6
71–80	19	53	16 ± 2.5	75 ± 2.6
81–90	20	65	15 ± 2.2	84 ± 2.6
50–88^*	27	67	16 ± 2.7	72 ± 10.8