There was a significant difference in marital status, ethnicity, BMI, β‐blocker, ACEI, ARB, diuretics, hypertension, COPD, AF, respiratory rate, heart rate, SBP, DBP, hemoglobin, neutrophil, lymphocytes, albumin, BUN, creatinine, creatine kinase, potassium, sodium, pH, lactate, glucose, PO2, PCO2, BE, GCS, OASIS, SAPS, and SOFA among the groups divided by L/A ratio. This evidence concerns the gene ALB and atrial fibrillation.