GPT and congestive heart failure: After adjusting for age, sex, race, MBP, heart rate, respiratory rate, potassium, sodium, creatinine, BUN, bicarbonate, glucose, platelets, WBC, hemoglobin, total calcium, ALT, charlson comorbidity index, SOFA, renal disease, diabetes, chronic pulmonary disease, and congestive heart failure, the association between serum phosphate and 28-day mortality remained significant.