ALB and diabetes mellitus: To further investigate the association between the lowest albumin level and the mortality rate in SAP patients, we first conducted a univariate logistic regression analysis model, which consisted of age, sex, BMI, etiology, hypertension, diabetes mellitus, white blood count, hematocrit, initial value of blood albumin, initial value of blood urea, initial value of blood creatinine, initial value of blood calcium, lowest albumin level within 1 week after admission, SIRS score ≥ 2 and APACHE II score ≥ 15.