In a study of 1023 critically ill patients, which outcomes were significantly greater for those with a serum albumin < 2.6 g/dL?

• A. ICU length of stay and mortality
• B. Hospital length of stay only
• C. Ventilator days only
• D. ICU length of stay, hospital length of stay, ventilator days, and mortality

Answer: (D)

Low serum albumin in critical illness signals a higher burden of disease and systemic inflammation, and it is linked with worse outcomes across several domains. In this large study, patients with albumin below 2.6 g/dL had significantly longer ICU stays, longer overall hospital stays, more days on the ventilator, and higher mortality compared with those with higher albumin. Albumin reflects nutritional status and the acute-phase response; when albumin is low, capillary leakage and edema increase, immune function can be compromised, and drug distribution and clearance change, all of which can contribute to slower recovery, more organ dysfunction, delayed weaning from ventilation, and greater risk of death. While albumin itself may not cause these outcomes, it serves as a useful prognostic marker of illness severity, explaining why multiple outcomes worsen together in patients with hypoalbuminemia.