TABLE 1.
All | Monozygotic sample | Dizygotic sample | |
---|---|---|---|
N | 6049 | 2416 (40.2) | 3620 (59.8) |
Female | 2099 (49.7) | 1280 (53.0) | 1719 (47.5) |
A‐TAC ADHD symptoms a | 0 (1) | −0.07 (0.91) | 0.05 (1.06) |
Missing >0 grade in GPA | 64 (1.1) | 19 (0.8) | 43 (1.2) |
Polygenic scores | |||
ADHD symptoms a | 0.00 (1.00) | −0.01 (0.99) | 0.01 (1.00) |
ADHD diagnosis a | 0.00 (1.00) | 0.02 (1.00) | −0.02 (1.00) |
Educational attainment a | 0.00 (1.00) | 0.00 (1.01) | 0.00 (0.99) |
Note: N (%) unless stated.
Abbreviations: ADHD, attention‐deficit/hyperactivity disorder; GPA, grade point average.
Mean (standard deviation).