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. 2021 Sep 8;1(3):e12030. doi: 10.1002/jcv2.12030

TABLE 1.

Descriptive statistics

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.

a

Mean (standard deviation).