Table 1.
Characteristics of All Individuals at First Evaluation, Stratified by Alzheimer Disease (AD) Incidence
| No. (%) of Individualsa |
P Value |
|||
|---|---|---|---|---|
| No Dementia (n = 1598) |
Incident AD (n = 282) |
All (N = 1880) |
||
| Male sex | 497 (31) | 90 (32) | 587 (31) | .79 |
| Age, mean (SD), y | 76.4 (6.3) | 82 (6.8) | 77.2 (6.6) | <.001 |
| Ethnicity | ||||
| White | 498 (31) | 33 (12) | 531 (28) | <.001 |
| Black | 513 (32) | 92 (33) | 605 (32) | |
| Hispanic | 561 (35) | 154 (55) | 715 (38) | |
| Otherb | 26 (2) | 3 (1) | 29 (2) | |
| Education, mean (SD), y | 10.6 (4.6) | 7.4 (4.4) | 10.1 (4.8) | <.001 |
| ≥1 Apolipoprotein E ε4 allele | 364 (23) | 79 (28) | 443 (24) | .07 |
| Energy, mean (SD), kcal/d | 1424.7 (526.6) | 1465.7 (550.9) | 1430.8 (530.4) | .23 |
| Body mass index, mean (SD)c | 27.6 (5.4) | 26.6 (5.9) | 27.4 (5.5) | .007 |
| Comorbidity index, mean (SD) | 1.1 (1.4) | 1.9 (1.5) | 1.9 (1.4) | .24 |
| Smoker | 199 (13) | 40 (14) | 239 (13) | .42 |
| Depression | 117 (7) | 27 (10) | 144 (8) | .20 |
| Leisure activities, mean (SD) | 5.2 (2.2) | 5.6 (2.1) | 5.3 (2.2) | .005 |
| Mediterranean-type diet score | ||||
| Low (range, 0–3) | 498 (31) | 100 (36) | 598 (32) | .18 |
| Middle (range, 4–5) | 661 (41) | 118 (42) | 779 (41) | |
| High (range, 6–9) | 439 (28) | 64 (23) | 503 (27) | |
| Physical activity | ||||
| No | 418 (26) | 102 (36) | 520 (28) | <.001 |
| Somed | 551 (35) | 99 (35) | 650 (35) | |
| Muche | 629 (39) | 81 (29) | 710 (38) | |
a
Unless otherwise indicated. Percentages may not equal 100% due to rounding.
b
Defined as non-white, non-black, American Indian or Pacific Islander, or Asian.
c
Calculated as weight in kilograms divided by height in meters squared.
d
Defined as a median of 0.1 hours per week of vigorous, 0.8 hours per week of moderate, or 1.3 hours per week of light physical activity, or a combination thereof.
e
Defined as a median of 1.3 hours per week of vigorous, 2.4 hours per week of moderate, or 3.8 hours per week of light physical activity, or a combination thereof.