The challenge of replicating putative genetic risk factors in a population‐based database.

In a recent publication in the Journal of Gastroenterology and Hepatology, Bale et al. discuss the discovery of rare genetic variants that contribute to nonalcoholic fatty liver disease (NAFLD). NAFLD is a common liver disease with increasing prevalence worldwide and is associated with significant mortality. The authors performed whole exome sequencing on a small cohort of patients and identified several genetic variants that differed significantly in frequency between NAFLD patients and controls. However, when these variants were analyzed in a larger dataset of European patients, only one variant was found to be significantly associated with NAFLD. This suggests that the results reported by Bale et al. may not be fully applicable to patient cohorts or populations of European descent. The study highlights the importance of replicating genetic findings in independent datasets to fully understand their implications. [Extracted from the article]