Table 1.
Characteristics of the study population at baseline (13–14 years of age).
| Total (n = 1041) n (%) | Males (n = 476) n (%) | Females (n = 565) n (%) | ||
|---|---|---|---|---|
| At least one parent with university education | Yes | 760 (73.5) | 349 (73.8) | 411 (73.3) |
| At least one parent born abroad | Yes | 178 (17.9) | 72 (15.9) | 106 (19.5) |
| Saliva samples with methylation >0% for each CpG site | CpG1 | 182 (17.5) | 78 (16.4) | 104 (18.4) |
| CpG2 | 130 (12.5) | 59 (12.4) | 71 (12.6) | |
| CpG3 | 526 (50.5) | 243 (51.1) | 283 (50.1) | |
| CpG4 | 199 (19.1) | 97 (20.4) | 102 (18.1) | |
| CpG5 | 88 (8.5) | 36 (7.6) | 52 (9.2) | |
| CpGs 1–5a | 637 (61.2) | 294 (61.8) | 343 (60.7) |
aMethylation > 0% in any CpG site.