CRP and atrial fibrillation: By comparing the characteristic factors between the two groups for different thrombotic outcomes in patients with lower extremity fractures, we found sex, age, ABO blood type, hypoalbuminemia, atrial fibrillation, total cholesterol, T triacylglycerol, albumin, white blood cell ratio, calcium ion, platelets, red blood cells, fibrinogen, d dimer, international normalized ratio, C-reactive protein and fracture types were significantly different between the two groups (P < 0.05).