AHRR and post-traumatic stress disorder: We identified 11 CpG sites associated with PTSD in the overall meta-analysis (1.44e − 09 < p < 5.30e − 08), as well as 14 associated in analyses of specific strata (military vs civilian cohort, sex, and ancestry), including CpGs in AHRR and CDC42BPB. Many of these loci exhibit blood–brain correlation in methylation levels and cross-tissue associations with PTSD in multiple brain regions.