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Hypoglycemia and outcome in critically ill patients
Moritoki Egi1, Rinaldo Bellomo, Edward Stachowski
1Department of Anesthesiology and Resuscitology, Okayama University Hospital, Okayama, Japan.
Mayo Clinic Proceedings
|February 24, 2010
Summary
Mild or moderate hypoglycemia in critically ill patients is linked to a higher risk of death. Even slight drops in blood glucose levels increase mortality, with severity correlating to risk.
Area of Science:
- Critical Care Medicine
- Endocrinology
- Clinical Pathology
Background:
- Hypoglycemia, defined as blood glucose levels below 81 mg/dL, is a concern in critically ill patients.
- The independent association between mild or moderate hypoglycemia and mortality in this population requires further investigation.
Purpose of the Study:
- To determine if mild or moderate hypoglycemia is independently associated with an increased risk of death in critically ill patients.
- To assess the relationship between the severity of hypoglycemia and patient outcomes.
Main Methods:
- Analysis of patients admitted to two intensive care units (ICUs) in Australia between 2000 and 2004.
- Identification of patients with at least one episode of hypoglycemia (glucose <81 mg/dL).
- Statistical assessment of the independent association between hypoglycemia and mortality, adjusting for factors like insulin therapy.
Main Results:
- Of 4946 ICU patients, 1109 (22.4%) experienced hypoglycemia.
- Hospital mortality was significantly higher in hypoglycemic patients (36.6%) compared to non-hypoglycemic controls (19.7%).
- Even mild hypoglycemia (glucose 72-81 mg/dL) was associated with increased unadjusted mortality (25.9% vs 19.7%), and mortality risk increased with hypoglycemia severity.
Conclusions:
- A significant association exists between mild to moderate hypoglycemia and increased mortality in critically ill patients.
- The severity of hypoglycemia independently predicts a greater risk of death, even after accounting for insulin therapy and timing of episodes.
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