Table 1. Demographic characteristics of participants.
| Characteristic | ROS | MAP | Combined |
|---|---|---|---|
| Cohort size, n | 492 | 487 | 979 |
| Age (years) at enrollment, mean (SD) | 78.3 (7.0) | 83.5 (5.7) | 80.9 (6.9) |
| Age (years) at death, mean (SD) | 87.8 (6.8) | 89.8 (5.8) | 88.8 (6.4) |
| Female, n (percent) | 308 (62.6%) | 322 (66.1%) | 630 (64.4%) |
| Education (years), mean (SD) | 18.2 (3.3) | 14.5 (2.8) | 16.4 (3.6) |
| Diagnosis of AD dementia, n (percent) | 209 (42.9%) | 184 (38.1%) | 393 (40.5%) |
| Pathological diagnosis of AD, n (percent) | 312 (63.4%) | 312 (64.1%) | 624 (63.7%) |
| Last global cognition, mean (SD) | −0.92 (1.26) | −0.90 (1.11) | −0.91 (1.19) |
Among 979 participants, only 970 participants were evaluated for final diagnosis of AD dementia. Last global cognition is the measure of global cognitive performance proximate to death (z-score derived from baseline mean and standard deviation).
AD, Alzheimer disease; MAP, Rush Memory and Aging Project; ROS, Religious Orders Study; SD, standard deviation.