Table 1. Summary of demographic variables in the Generation Scotland cohort.
| Phenotype | Units | n | Mean | SD |
|---|---|---|---|---|
| Age | years | 18,413 | 47.5 | 14.9 |
| Alcohol Consumption | units/week | 16,705 | 11.0 | 13.0 |
| Body Mass Index | kg/m2 | 18,299 | 27.0 | 5.2 |
| DNAm smoking score (EpiSmokEr) | - | 18,413 | 1.4 | 4.3 |
| n | Median | IQR | ||
| Education | 11-category ordinal variable | 17,389 | 4 | 3 |
| Scottish Index of Multiple Deprivation | rank | 17,287 | 4,331 | 3,115 |
| n | n-female | % female | ||
| Sex | - | 18,413 | 10,833 | 58.8 |
DNAm, DNA methylation; IQR, interquartile range; SD, standard deviation.
Education was measured as an ordinal variable: 0, 0 years; 1, 1–4 years; 2, 5–9 years; 3, 10–11 years; 4, 12–13 years; 5, 14–15 years; 6, 16–17 years; 7, 18–19 years; 8, 20–21 years; 9, 22–23 years; 10, ≥24 years.