Table 2.

Demographic characteristics of participants with Alzheimer's disease (AD) and comparison groups (C) at the three testing points (Time 1, Time 2, and Time 3)

Time 1
	AD*	C*
N	9	6
Age at the first NP exam	76±12 [51, 92]	75±12 [61, 90]
Time between first NP and death	13±7 [6, 27]	17±12 [6, 29]
Age at death	89±12 [59, 100]	92±3 [88, 97]
Male, n (%)	5 (55.6%)	3 (50.0%)
Education, n (%)
High school	2 (22.2%)	2 (33.3%)
High school graduate	3 (33.3%)	2 (33.3%)
Some college or greater	4 (44.4%)	2 (33.3%)

Time 2
	AD*	C*
N	15	14
Age at the first NP exam	75±11 [51, 92]	69±11 [57, 90]
Time between first NP and death	13±9 [4, 29]	17±11 [3, 30]
Age at death	88±10 [59, 100]	86±11 [83, 105]
Male, n (%)	10 (66.7%)	5 (35.7%)
Education, n (%)
High school	3 (20.0%)	2 (14.2%)
High school graduate	5 (33.3%)	6 (42.9%)
Some college or greater	7 (46.7%)	6 (42.9%)

Time 3
	AD*	C*
N	11	19
Age at the first NP exam	76±9 [64, 92]	71±9 [58, 90]
Time between first NP and death	15±10 [4, 28]	14±11 [0.32, 29]
Age at death	91±5 [82, 98]	85±11 [61, 105]
Male, n (%)	6 (54.5%)	10 (52.6%)
Education, n (%)
High school	3 (27.3%)	3 (15.8%)
High school graduate	3 (27.3%)	8 (42.1%)
Some college or greater	5 (45.4%)	8 (42.1%)

All results are mean ± SD [min, max] unless otherwise stated.

^*There is no statistically significant difference between any AD and C groups at any time point; all p-values are > 0.05.