Table 5.
Incidence Rate of All Dementia in EFIGA Families
| Age Group, y | No. of Cases | Person-years at Risk | Incidence Rate (95% CI) | Characteristic, Mean (SD) | |
|---|---|---|---|---|---|
| Educational Level, ya | Person-years at Risk | ||||
| 55–64 | 22 | 895 | 0.03 (0.02–0.04) | 10.3 (5.3) | 3.2 (1.8) |
| 65–74 | 68 | 1148 | 0.06 (0.05–0.08) | 7.1 (4.9) | 4.4 (3.0) |
| 75–84 | 65 | 634 | 0.10 (0.08–0.13) | 6.4 (5.2) | 4.2 (3.1) |
| ≥85 | 19 | 188 | 0.10 (0.06–0.16) | 5.3 (4.3) | 4.5 (3.3) |
Abbreviation: EFIGA, Estudio Familiar de Influencia Genetica en Alzheimer.
a
We found no significant difference between the education levels among the age groups (F test, P = .14).