Table 1.
Characteristics of the study sample by parental longevity status
| Mean (SD) or (%) | Parental longevitya (n = 407) | Parental usual survivala (n = 321) | P-value |
|---|---|---|---|
| Age, years | 66 (6) | 65 (6) | <0.001 |
| Women (%) | 54 | 55 | 0.72 |
| Education, <high school (%) | 2 | 3 | 0.004 |
| Education, high school degree (%) | 55 | 66 | |
| Education, college (%) | 43 | 31 | |
| Hypertension (%) | 48 | 52 | 0.28 |
| Diabetes (%) | 12 | 18 | 0.015 |
| Current smoking (%) | 6 | 14 | <0.001 |
| Cardiovascular disease (%) | 10 | 15 | 0.036 |
| Atrial fibrillation (%) | 3 | 3 | 0.71 |
| ApoE ϵ4 genotype carriers (%) | 23 | 23 | 0.91 |
| MMSE score (%) | 29.0 (1.2) | 28.8 (1.6) | 0.007 |
| Parental dementia (%) | 28 | 21 | b |
MMSE, Mini-Mental State Examination.
aParental longevity = at least one parent alive at age ≥85 years; parental usual survival = both parents deceased at age <85 years.
bInformation available on parental dementia by age 85 years on n = 324.