Table 1 Descriptive statistics of the full sample and subsample with complete phenotype data.
Variable | N (% missing) | Mean (SD) | Range | N (% missing) | Mean (SD)a | Range | |
|---|---|---|---|---|---|---|---|
Genetic data (trios) | 31,290 | Â | Â | Â | Â | Â | |
Conduct disorder subscale | Age 8 | Â | Â | Age 14 | Â | Â | |
| Â | Any item | 15,477 (50.5) | Â | Â | 8035 (74.3) | Â | Â |
| Â | All items | 15,320 (51.0) | Â | Â | 7883 (74.8) | Â | Â |
Item 1 | Bullies/threatens/intimidates | 15,435 (50.6) | 1.20 (0.47) | 1–4 | 8019 (74.4) | 1.13 (0.53) | 1–6 |
Item 2 | Initiates physical fights | 15,437 (50.7) | 1.11 (0.36) | 1–4 | 8020 (74.4) | 1.05 (0.31) | 1–6 |
Item 3 | Physically cruel | 15,427 (50.6) | 1.27 (0.53) | 1–4 | 8010 (74.4) | 1.12 (0.49) | 1–6 |
Item 4 | Injured animals | 15,452 (50.6) | 1.02 (0.17) | 1–4 | 8014 (74.4) | 1.02 (0.22) | 1–6 |
Item 5 | Stolen items from others | 15,447 (50.6) | 1.02 (0.17) | 1–3 | 8010 (74.4) | 1.08 (0.44) | 1–6 |
Item 6 | Destroyed property | 15,444 (50.6) | 1.05 (0.23) | 1–4 | 8023 (74.4) | 1.07 (0.36) | 1–6 |
Item 7 | Truant from school | 15,431 (50.7) | 1.01 (0.12) | 1–4 | 8004 (74.4) | 1.30 (0.79) | 1–6 |
Item 8 | Used harmful objects | 15,444 (50.6) | 1.04 (0.22) | 1–4 | 8006 (74.4) | 1.02 (0.24) | 1–6 |
|  | Sample with complete child data 8 y | Genotyped trio sample | Full MoBa sampleb | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Â | N | Mean (SD) | Range | N | Mean (SD) | Range | N | Mean (SD) | Range |
Maternal age (baseline) | 15,320 | 30.53 (4.31) | 17–45 | 31,290 | 30.19 (4.49) | 17–45 | 111,635 | 30.13 (4.65) | 17–45 |
Paternal age (baseline) | 15,320 | 32.84 (5.08) | 18–59 | 31,288 | 32.60 (5.22) | 18–59 | 111,121 | 32.73 (5.47) | 18–59 |
| Â | Mothers | Fathers | Mothers | Fathers | Mothers | Fathers |
|---|---|---|---|---|---|---|
Parental education (baseline) | N (%) | N (%) | N (%) | N (%) | N (%) | N (%) |
Lower secondary education | 172 (1.2) | 400 (2.8) | 599 (2.1) | 963 (3.5) | 2749 (2.8) | 2969 (4.0) |
Upper secondary school, basic | 426 (2.9) | 725 (5.1) | 1230 (4.3) | 1600 (5.8) | 4946 (5.1) | 4604 (6.2) |
Vocational upper secondary school | 1533 (10.6) | 3370 (23.7) | 3626 (12.8) | 7143 (26.1) | 12,569 (13.0) | 19,166 (25.9) |
Upper secondary school, completed | 1798 (12.4) | 1708 (12.0) | 4013 (14.1) | 3432 (12.5) | 14,283 (14.8) | 9160 (12.4) |
Higher education, undergraduate level | 6634 (45.8) | 4186 (29.5) | 12,060 (42.4) | 7651 (27.9) | 39,405 (40.8) | 19,967 (27.0) |
Higher education, graduate level | 3925 (27.1) | 3818 (26.9) | 6891 (24.2) | 6620 (24.2) | 22,567 (23.4) | 18,087 (24.5) |
