Table 1.

Descriptive characteristics of Harvard Aging Brain Study cohort, by baseline Aβ+/− status

	All	Aβ+	Aβ−
N (%)	279	70 (25%)	209 (74.9%)
Age (years)∗	73.42 ± 6.01	74.99 ± 5.74	72.88 ± 6.02
APOE ε4+ (%)∗	29	61	18
Female (%)	59	61	59
Education	15.85 ± 3.04	16.25 ± 2.94	15.71 ± 3.08
MMSE	29.00 ± 1.10	28.83 ± 1.06	29.06 ± 1.11
LMDR	13.73 ± 3.27	14.01 ± 3.14	13.62 ± 3.32
DSC	47.23 ± 10.69	46.93 ± 10.03	47.34 ± 10.93
FCSRT96	80.91 ± 5.87	80.73 ± 5.95	80.96 ± 5.86
CAT	44.42 ± 9.99	44.93 ± 9.97	44.24 ± 10.02
Animals	17.85 ± 5.07	18.19 ± 4.50	17.73 ± 5.25
Vegetables	13.37 ± 3.53	13.60 ± 3.42	13.29 ± 3.57
Fruits	13.21 ± 3.50	13.67 ± 3.64	13.05 ± 3.44

Abbreviations: CAT, category fluency; DSC, Digit-Symbol Coding Test; FCSRT96, Free and Cued Selective Reminding Test; MMSE, Mini–Mental State Examination; LMDR, Logical Memory Delayed Recall.

NOTE. χ² tests were used to compare sex distributions, and t-tests were used to compare continuous variables. Mean and standard deviations are reported unless otherwise stated.

^∗Variables with significant differences between Aβ groups (P < .05).