. 2022 Oct 26;4(6):fcac272. doi: 10.1093/braincomms/fcac272

Table 1.

Comparison of A/T groups on demographic variables and PET values

Variable	A−/T−	A−/T+	A+/T−	A+/T+	Test statistic	P-value
n (% of sample)	332 (47.2%)	95 (13.5%)	86 (12.2%)	190 (27.0%)	N/A	N/A
Age, mean (SD)	71.5 (7.3)	74.7 (6.7)^a	75.5 (8.2)^a	74.7 (7.2)^a	F = 12.6	<0.001
Sex, % Female	53.3%	47.4%	40.0%	54.5%	χ² = 6.6	0.08
Education, mean (SD)	16.5 (2.5)	17.2 (2.2)^a	16.7 (2.5)	15.9 (2.5)^c	F = 6.9	<0.001
Race, % White	88.7%	86.7%	90.6%	91.6%	χ² = 2.3	0.83
GDS score, mean (SD)	1.1 (1.4)	1.6 (2.1)	1.1 (1.2)	1.6 (1.7)^b	F = 4.7	0.002
Aβ centiloid, median (SD)	4.8 (10.4)	6.1 (11.4)	51.6 (29.5)^a	84.0 (29.0)^c	F = 528.3	<0.001
Tau SUVR, median (SD)	1.2 (0.1)	1.3 (0.1)^a	1.2 (0.1)	1.6 (0.4)^c	F = 153.3	0.001

GDS, geriatric depression scale; n, sample size; SD, standard deviation.

^{^a}

Significantly different from the A−/T− group.

^{^b}

Significantly different from the A−/T− and A+/T− groups.

^{^c}

Significantly different from all other groups.