Table 2 Descriptive statistics for those included & excluded from the study
|  | Eligible cohort participants (n = 527) | Participants excluded from study (n = 23) |
|---|---|---|
Deceased | ||
 Living | 102 (19.4%) | 11 (47.8%) |
 Deceased | 425 (80.6%) | 12 (52.2%) |
Sex | ||
 Male | 222 (42.1%) | 12 (52.2%) |
 Female | 305 (57.9%) | 11 (47.8%) |
Age at wave 1 | ||
 Mean age in years | 79.1 (SD: 0.6) | 79.2 (SD: 0.5) |
APOE ɛ4 carrier status | ||
 Carrier | 139 (26.4%) | 7 (30.4%) |
 Not carrier | 382 (72.5%) | 15 (65.2%) |
 Data missing | 6 (1.1%) | 1 (4.3%) |
Age 11 IQ | ||
 Data available | 473 (89.8%) | 20 (87.0%) |
 Data missing | 54 (10.2%) | 3 (14.3%) |
 Mean age 11 IQ | 100.1 (SD: 14.8) | 97.8 (SD: 19.6) |
MMSE | ||
 Data available | 527 (100%) | 21 (91.3%) |
 Data missing | - | 2 (8.7%) |
 Mean MMSE | 28.3 (SD: 1.5) | 25.2 (SD: 3.3) |