Table 2.

Demographic characteristics of the Aβ+ participants with and without tau-PET

	Tau-PET (n = 60)	No tau-PET (n = 37)	t / odds ratio [95% CI]	P
Age	67.1 (9.2)	70.4 (6.8)	− 2.06 [− 6.61; − 0.12]	.04
Education	16.4 (2.4)	17.6 (2.8)	− 2.01 [−  2.23; − 0.01]	.05
Female	32 (53%)	13 (35%)	1.96 [0.79; 5.04]	.14
Non-Hispanic White	56 (93%)	32 (86%)	1.18 [0.27; 4.75]	.76
MCI	32 (53%)	31 (84%)	4.17 [1.43; 14.06]	.004
Amnestic phenotype	33 (55%)	24 (65%)	0.66 [0.26; 1.66]	.40
CDR-SB	4.3 (2.2)	2.3 (1.7)	2.98 [0.40; 2.01]	.004
Time difference (yrs)	0.2 (0.3)	0.7 (0.9)	− 2.67 [− 0.70; − 0.10]	.01
Favorites z-score	− 2.7 (1.0) n = 51	− 1.9 (1.1) n = 36	− 3.17 [− 1.22; − 0.28]	.002
Match z-score	− 4.6 (2.5) n = 54	− 2.3 (2.3) n = 37	− 4.28 [− 3.19; − 1.17]	< .001
Line Orientation z-score	− 1.5 (2.6) n = 56	− 0.5 (2.0) n = 37	2.15 [− 2.04; − 0.08]	.03
BHS-ECog score	2.6 (0.6) n = 50	2.3 (0.7) n = 33	1.58 [− 0.07; 0.58]	.12

Data are presented as mean (standard deviation) for continuous variables and n (% of the total sample) for categorical variables. Time difference represents the years between the BHA completion and PET acquisition presented in absolute values. For Brain Health Assessment measures, the number of participants with complete data is included. P values are based on independent sample t-tests for continuous variables and Fisher’s exact tests for categorical variables between groups with and without tau-PET. The 95% confidence intervals (CI) are reported for mean differences for t-tests and odd ratios for Fisher’s exact tests. BHS-ECog Brain Health Survey Everyday Cognition Scales, CDR-SB Clinical Dementia Rating Scale Sum of Boxes, MCI mild cognitive impairment, PET positron emission tomography, yrs. years