analysis, which corrects for testing eight non-independent SNPs. Post-hoc probing of significant moderator effects required plotting and testing the ‘simple slopes’ of the relation between ADHD symptoms and working memory by individual genotypes for each SNP (Holmbeck, 2002). Models were adjusted for the number of years that had elapsed between the baseline and follow-up evaluations. CBCL attention problems T-scores were logarithmically transformed due to the skewness of the data at follow-up (Supplementary Figures S1–S3).
