The highest albumin-corrected calcium group (≥12 mg/dl) had the highest mortality, APACHE-IV score, serum magnesium, and lactate values, and it had the most diabetes mellitus, acute respiratory failure, atrial fibrillation, cardiac arrest, chronic kidney disease, ESRD, sepsis, cancer, vancomycin, and carbapenem treatment population; furthermore, this group had the lowest BMI and serum albumin levels. This evidence concerns the gene ALB and atrial fibrillation.