ALB and type 2 diabetes mellitus: T2DM group had higher age (p = 0.004 < 0.05), BMI (p = 0.000 < 0.05), open surgery (p = 0.014 < 0.05), pre-operative hemoglobin (p = 0.008 < 0.05), and pre-operative albumin (p = 0.043 < 0.05).