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. 2012 Sep 25;7(9):e45936. doi: 10.1371/journal.pone.0045936

Figure 1. Genome-wide QQ plots of expected and observed –log(P) values for all SNPs analyzed in linear regression covariate-adjusted models for the selected four-year neuropsychological domains.

Figure 1

Panel A presents the QQ plot for the phenotype, ADHD-IV Impulsivity Scale. Panel B presents the QQ plot for the phenotype, CBCL/1.5-5 PDPs. Panel C presents the QQ plot for the phenotype, CBCL/1.5-5 Total Problems. λ  =  genomic inflation factor.