Table 1. Demographic and testing results at the time of the initial and repeat scans (median 5.8 years later). Values are median [IQR].

	Baseline			Follow-up
	Normal (N = 78)	MCI* (N = 6)	AD	Normal (N = 69)	Incident MCI (N = 8)	AD (N = 7)
Age, years	73.4	81.9	-	78.8	81.7	85.9§
	[66.9–78.4]	[77.4–87.8]		[73.0–83.5]	[73.3–89.3]	[82.2–93.0]
Gender F/M	53/25	4/2	-	47/22	5/3	5/2
Education	16	15.5	-	16	16	16
	[15–18]	[12.8–16.5]		[15–18]	[12.3–18]	[13–18]
MMSE	30	27.0	-	29.0%	27.0	19
	[29–30]	[26.8–28.3]		[29–30]	[26–29.8]	[5–22]
LM-II	36	19.0	-	36.0%	27	7.5
	[31–38]	[11.3–25.3]		[32–39]	13–28]	[3.3–21.3]
LM%	98	46.0	-	98%	84	4.5
	[90.5–99]	[9.8–74]		[92–99]	[12–86]	[1.8–61.5]
List Learn	24	16.5	-	25	20¶	18
	[22–26]	[14.5–20]		[22–27]	[18–22]	[16.5–18]
List Delay	9	4.0	-	9	6¶	3
	[8–9]	[1.5–4.5]		[8–10]	[1–8]	[2–4]

*MCI different from normal baseline on all covariates except gender & education; Wilcoxon rank sum test, p < 0.01; § Older than Normal & MCI; % All three groups different, maximum p< 0.02; ¶ Different from normal but not AD, maximum p < 0.01; Wilcoxon multiple comparison.