Table 4.
Participant characteristics at time of enrollment by educational attainment
| Educational attainment ≤12 years N=339 n (%) |
Educational attainment >12 years N=1,947 n (%) |
p | |
|---|---|---|---|
| Age in years * | 74.32 (7.08) | 73.02 (7.22) | .005† |
| Sex at birth | .001‡ | ||
| Male | 153 (45%) | 1061 (54%) | |
| Female | 186 (55%) | 886 (46%) | |
| Ethnocultural group ** | .0132 | ||
| Latinx | 17 (5%) | 71 (4%) | |
| Non-Latinx Asian | 1 (0%) | 45 (2%) | |
| Non-Latinx Black | 24 (7%) | 90 (5%) | |
| Non-Latinx White | 292 (86%) | 1711 (88%) | |
| Others | 5 (1%) | 30 (2%) | |
| Diagnosis group | <.001‡ | ||
| Cognitively unimpaired | 75 (22%) | 756 (39%) | |
| Mild cognitive impairment | 172 (51%) | 884 (45%) | |
| Alzheimer’s disease | 92 (27%) | 307 (16%) | |
| Family history of AD/dementia | <.001‡ | ||
| No | 165 (53%) | 668 (39%) | |
| Yes | 145 (47%) | 1053 (61%) | |
| Original cohort | <.001‡ | ||
| ADNI-1 | 162 (48%) | 657 (34%) | |
| ADNI-GO | 19 (6%) | 112 (6%) | |
| ADNI-2 | 109 (32%) | 681 (35%) | |
| ADNI-3 | 49 (14%) | 497 (26%) | |
| Amyloid | .009‡ | ||
| Abeta+ | 204 (86%) | 1221 (78%) | |
| Abeta− | 34 (14%) | 338 (22%) |
Note.
*
Mean (standard deviation) for continuous variables. N is the number of non-missing values.
**
P-values are derived from tests excluding the Others ethnocultural level.
Tests used:
†
Wilcoxon test
‡
Pearson test.