Supplementary Material for: Additive Association of ABCG2 rs4148155 and SLC22A12 rs75786299 Polymorphisms with Hyperuricemia, Gout and Nephrolithiasis, a Hospital-Based, Case-Control Study

Introduction: This study aimed to investigate the interaction between the ABCG2 rs4148155 and SLC22A12 rs75786299 variants and their association with incident gout and nephrolithiasis in the Taiwanese population to better understand the genetic loci regulating hyperuricemia and their contribution to nephrolithiasis development. Methods: This retrospective case-control study involved 35,280 adults from the Taiwan Precise Medicine Initiative (TPMI) database. We examined the prevalence of gout and ultrasound confirmed nephrolithiasis as the primary and secondary outcome. Logistic regression models were used to explore the associations between genetic variants, serum uric acid levels, incident gout, and nephrolithiasis. Results: The frequencies of the rs4148155 variant and the rs75786299 variant were 63.2% and 3.7%, respectively. Among participants, 7,056 were gout, and 4,110 had nephrolithiasis. Multivariable odds ratios (ORs) for gout were 1.67 and 1.96 among rs4148155 and rs75786299 carriers, respectively (p=0.01 and p