Fig. 1: Manhattan plot and quantile–quantile plot of results from the GWAS meta-analysis of ADHD + DBDs.

A Results from GWAS meta-analysis of iPSYCH and PGC cohorts in total including 3802 cases and 31,305 controls. The x-axis represents autosomal chromosomes colored in light and dark blue. The y-axis represents two-sided P-values from meta-analysis using an inverse-variance weighted fixed effects model. The red horizontal line represents the threshold for genome-wide significant association (P = 5 × 10−8). B Quantile–quantile (q–q) plot with expected −log10 P-values on the x-axis and −log10 P-values from the GWAS meta-analysis on the y-axis. The dotted line indicates the distribution under the null hypothesis.