Table 3.
Demographic information for Generation Scotland: Scottish Family Health Study
| Whole sample | Methylation sample | |||||
|---|---|---|---|---|---|---|
| Item | N | Present/absent (%) | Mean, SD | N | Present/absent (%) | Mean, SD |
| Female | 24 080 | 14 154/9926 (58.8) | 9537 | 5638/3899 (59.1) | ||
| Age | 24 080 | 47.64, 15.41 | 9537 | 49.81, 13.70 | ||
| Preterm birth | 3134 | 109/3025 (3.5) | 950 | 31/919 (3.3) | ||
| Low birth weight | 3129 | 103/3026 (3.3) | 949 | 30/919 (3.2) | ||
| Birth month | 24 080 | 12 842/11 238 (53.3) | 9516 | 5459/4057 (57.4) | ||
| Birth date | 22 656 | 0.01, 0.71 | 9509 | 0.01, 0.71 | ||
| Young parent | 23 546 | 1241/22 305 (5.3) | 9398 | 534/8864 (5.7) | ||
| Lone parent | 22 543 | 1333/21 210 (5.9) | 9086 | 580/8506 (6.4) | ||
| Urban environment | 19 428 | 11 739/7689 (60.4) | 8017 | 5468/2549 (68.2) | ||
| Population density | 19 426 | 1949.72, 1611.32 | 8017 | 2019.44, 1489.35 | ||
| Major depressive disorder | 21 340 | 2766/18 574 (13.0) | 9481 | 1624/7857 (17.1) | ||
| Brief resilience scale | 9354 | 0.00, 3.80 | 4839 | −0.19, 3.90 | ||
Notes: Number of individuals (N) available for each item. The present N, absent N and prevalence (%) are reported for binary items with mean and SD reported for continuous items.
Age was reported in years, a preterm birth was recorded as present for those born < 37 weeks gestation length, a low birth weight was recorded as present for individuals born in the 3rd centile for birth weight adjusted for sex and gestation length, birth month compares those born between April and October inclusive (present) with those born the rest of the year (absent), birth date is a continuous measure of when an individual was born during the year with a maximum value for those born 21st June and a minimum value for those born 21st December, a young parent was present for individuals when either parent was <21 years old when the individual was born, a lone parent was recorded as present for individuals who were not living with both parents when the individual was born, an urban environment was present for individuals recorded as living in Edinburgh, Glasgow, Aberdeen or Dundee when they were born, population density was the number of individuals per square kilometre in their region when an individual was born, MDD status was based on a structured clinical interview and brief resilience scale was a continuous measure of an individual’s psychological resilience.