LOXL2 and atrial fibrillation: The univariate regression analysis model showed that serum LOXL2 [odds ratio (OR) 1.011, 95% confidence interval (CI) 1.006–1.016, P<0.001] and LAD (OR 1.449, 95% CI 1.222–1.717, P<0.001) were associated with AF.