The PITT GWAS sample set was genotyped using the Illumina HumanOmni1-Quad BeadChip which captures genotype data on 1,016,423 genomic SNPs. The standard Alzheimer’s Disease Genetics Consortium (ADGC) quality control pipeline (Naj et al. 2011) was applied to this GWAS dataset. The final QC’d dataset is on GRCh38.