The total variance explained by ADHD-PGS and model covariates for each neurocognitive phenotype was reported using Adjusted R2. Additionally, the variance explained by ADHD-PGS was calculated in R using a variance partitioning tool (https://github.com/GabrielHoffman/misc_vp/blob/master/calcVarPart.R). Reported P-values were Bonferroni-adjusted to account for the number of independent tests performed.
