Table 1b.

Demographic, clinical, and imaging data for all healthy older controls (HC) in this study. MMSE = Mini-mental status exam, APC = Annualized Percent Change, SE = Standard error of the mean, CI = Confidence Interval

	Aβ -/P-tau - (n = 46)	Aβ -/P-tau + (n = 19)	Aβ +/P-tau - (n = 20)	Aβ +/P-tau + (n = 21)
Age, Mean (SE)	74.3 (0.6)	78.0 (1.4)	74.9 (1.1)	78.2 (1.0)
Female, %	24	29	31	38
Education Years, Mean (SE)	15.5 (0.4)	15.5 (0.4)	14.8 (0.8)	16.7 (0.6)
MMSE, Mean (SE)	29.1 (0.1)	28.8 (0.3)	29.1 (0.2)	29.3 (0.2)
Years Between MRI Scans, Mean (SE)	2.3 (0.1)	2.3 (0.2)	2.3 (0.1)	2.4 (0.2)
Entorhinal Cortex APC, Mean (95% CI)	-0.6 (-0.4, -0.8)	-0.6 (-0.2, -1.0)	-0.6 (-0.2, -1.0)	-1.2 (-0.8, -1.6)