CRP and atrial fibrillation: All of these parameters were then entered into a multiple logistic regression model, and the LTL (OR 0.404, 95% CI 0.278-0.587; P <0.001), CRP (OR 1.971, 95% CI 1.023-3.799; P = 0.043), and serum PGC-1α (OR 0.994, 95% CI 0.989-0.998; P = 0.003) remained to be significantly associated with the presence of AF (Table 3).