CRP and atrial fibrillation: Compared with the NAF group, patients with AF were older [(67.55 ± 5.23) years vs. (62.28 ± 6.02) years; P = 0.001], with higher C-reactive protein (CRP) [40.5 (12.6, 81.8) mg/L vs. 18.4 (6.6, 56.53) mg/L; P = 0.011], heart rate [83 (61.2, 89.0) bpm vs. 72 (62.4, 80.2) bpm; P = 0.035] and LPS [(57.37 ± 18.06) ng/ml vs. (42.19 ± 12.27) ng/ml; P < 0.001] were significantly higher, with statistically significant differences.