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) |