Most genome-wide association studies (GWASs) of obsessive-compulsive disorder (OCD) have been conducted in European populations, limiting the understanding of OCD genetics across populations. Here, we investigated the cross-ancestry and cross-disorder transferability of European-derived polygenic risk scores (PRSs) for OCD in the first East Asian OCD cohort. We performed a GWAS in 532 Korean OCD cases and 4376 controls, followed by PRS analyses using European GWASs for OCD and 10 psychiatric…
