Table 4.
Characteristics of study population
| Variable | M(SD) or N(%) |
|---|---|
| Age at study entry, M(SD) | 79.5 (6.51) |
| Follow-up years, M(SD) | 8.1 (4.63) |
| Sex, N(%) | |
| Male | 321 (23.50%) |
| Female | 1045 (76.50%) |
| Race and ethnicity, N(%) | |
| Hispanic | 61 (4.47%) |
| Non-Hispanic Black | 50 (3.66%) |
| Non-Hispanic White | 1247 (91.29%) |
| Non-Hispanic Other | 8 (0.59%) |
| Smoking status, N(%) | |
| Never | 804 (58.86%) |
| Former | 526 (38.50%) |
| Current | 36 (2.64%) |
| ApoE4 copies, N(%) | |
| 0 | 909 (79.32%) |
| 1 | 224 (19.55%) |
| 2 | 13 (1.13%) |
| Married, N(%) | 510 (37.34%) |
| Retired, N(%) | 1207 (88.36%) |
| Category of main occupation, N(%) | |
| Operative and service workers | 123 (9.69%) |
| Managerial | 675 (53.19%) |
| Professional | 471 (37.12%) |
| Years of education, M(SD) | 15.0 (3.25) |
| Mini-Mental State Examination Score, M(SD) | 28.5 (1.52) |