Research Article
Alzheimer's Disease Genes Are Associated with Measures of Cognitive Ageing in the Lothian Birth Cohorts of 1921 and 1936
Table 1
Details of the Lothian Birth Cohorts of 1921 and 1936.
| | LBC1921 | LBC1936 |
| Total | 505 | 998 | Females (%) | 296 (58.7) | 494 (49.5) | Males (%) | 209 (41.3) | 504 (50.5) | Mean age in years1 (± s.d) | 10.9 ± 0.28 | 10.9 ± 0.28 | Mean age in years2 (± s.d) | 79.11 ± 0.57 | 69.58 ± 0.83 | ≥1 APOE ε4 allele | 135 | 287 | no APOE ε4 allele | 370 | 672 |
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1Mean age at original test date, 2Mean age when revisited.
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