CRP and atrial fibrillation: <h4>Objective</h4>This study aimed to investigate the association between a novel composite biomarker, the C-reactive protein to triglyceride-glucose index (CTI) and the prevalence of atrial fibrillation (AF) in a general adult population.<h4>Methods</h4>This cross-sectional study included 2, 988 participants Clinical and laboratory data were collected to calculate the CTI.