Table 3.

Longitudinal atrophy sample

	Nondemented	Converter	AD
n	44	8	40
Male/female	34/10	3/5	16/24
Age (years)	78.4	77.7	76.7.
Education (years)	14.9	15.1	13.5
CDR time 1 (n)	0 (44)	0 (8)	0.5 (31), 1(9)
CDR time 2 (n)	0 (44)	0.5 (8)	0.5 (23), 1 (16), 2 (1)
MMSE time 1	29.3	28.8	24.4
MMSE time 2	29.1	28.6	23.9
Delay (years)	2.15	2.57	1.72

Analyses subdividing the AD participants by dementia severity do so using the CDR at time 1, yielding 31 very mild and 9 mild participants (see Fig. 3).