Metabolic Risk Factors
  • A multifactorial risk index for postoperative respiratory failure identified two metabolic risk factors:
    • Albumin less than 3 g/dL
    • Blood urea nitrogen (BUN) greater than 30 mg/dL
    • Each predicted risk:  odds ratios were 2.53 and 2.29, respectively.
  • A systematic review found that the magnitude of risk associated with a low serum albumin was similar to the degree of the most important patient-related risk factors and a stronger predictor of risk than an elevated BUN