TABLE 1—
Characteristics of Adult Changes in Thought Study Cohort Sample (n = 3605), by Dementia Diagnosis During Follow-Up: Adult Changes in Thought Study, Northwestern United States, 1994–2010
| Diagnosed With Dementia (n = 815), No. (%) | No Dementia During Follow-Up (n = 2790), No. (%) | |
| Baseline age, y | ||
| 65–69 | 89 (10.9) | 762 (27.3) |
| 70–74 | 201 (24.7) | 898 (32.2) |
| 75–79 | 227 (27.9) | 576 (20.6) |
| 80–84 | 188 (23.1) | 366 (13.1) |
| ≥ 85 | 110 (13.5) | 188 (6.7) |
| Gender | ||
| Male | 307 (37.7) | 1141 (40.9) |
| Female | 508 (62.3) | 1649 (59.1) |
| Education | ||
| ≤ high school | 359 (44.0) | 901 (32.3) |
| Some college | 221 (27.1) | 732 (26.2) |
| ≥ college | 235 (28.8) | 1156 (41.4) |
| Race/ethnicity | ||
| White | 749 (91.9) | 2525 (90.7) |
| Black | 31 (3.8) | 118 (4.2) |
| Asian | 22 (2.7) | 99 (3.5) |
| American Indian/Alaska Native | 3 (0.4) | 5 (0.2) |
| Hawaiian/Pacific Islander | 0 (0.0) | 1 (0.0) |
| Other | 10 (1.2) | 37 (1.3) |
| Baseline body mass index, kg/m2 | ||
| < 18.5 | 13 (1.6) | 23 (0.8) |
| 18.5–24.9 | 275 (34.4) | 862 (31.6) |
| 25.0–29.9 | 332 (41.5) | 1127 (41.3) |
| ≥ 30.0 | 180 (22.5) | 720 (26.4) |
| Detection of health conditions during follow-up | ||
| Hypertension | 656 (80.5) | 2212 (79.3) |
| Stroke | 68 (8.3) | 167 (6.0) |
| Myocardial infarction | 119 (14.6) | 383 (13.7) |
| Nursing home entry during follow-up | 15 (1.8) | 16 (0.6) |
Note. Percentages were calculated based on all individuals with nonmissing data for each variable. Number of observations with missing data were education (1), race/ethnicity (5), body mass index (73), stroke (7), and myocardial infarction (7). The sample size was n = 3605.