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  • Title: Admission hypoglycemia and increased mortality in patients hospitalized with pneumonia.
    Author: Gamble JM, Eurich DT, Marrie TJ, Majumdar SR.
    Journal: Am J Med; 2010 Jun; 123(6):556.e11-6. PubMed ID: 20569764.
    Abstract:
    BACKGROUND: The relationship between spontaneous admission hypoglycemia and mortality in patients hospitalized with community-acquired pneumonia is unclear. METHODS: From 2000 to 2002, clinical data were prospectively collected on all patients with community-acquired pneumonia who were admitted to all 6 hospitals in Edmonton, Alberta, Canada. Patients with admission glucose greater than 6.1 mmol/L (n=1996) were excluded; the remaining patients were categorized as having admission hypoglycemia (<4.0 mmol/L [n=54]) or normoglycemia (4.0 to< or =6.1 mmol/L [n=902]). Multivariable Cox proportional hazards models were used to examine the relationship between hypoglycemia and all-cause mortality in-hospital, at 30 days, and at 1 year. RESULTS: The mean age was 65 (standard deviation=20) years, 48% were female, 8% had diabetes, and 56% had severe pneumonia. Overall, admission hypoglycemia was present in 2% (54/2990) of the entire cohort and 6% of those with glucose of 6.1 mmol/L or less. Total deaths were 89 (9%) in-hospital, 96 (10%) at 30 days, and 247 (26%) at 1 year. In-hospital mortality was higher among patients with admission hypoglycemia (11 [20%] deaths) compared with those with normoglycemia (78 [9%]; adjusted hazards ratio [aHR] 2.96; 95% confidence interval [CI], 1.39-6.31; P=.005). An increased risk of mortality was observed at 30 days (11 [20%] vs 85 [10%]; aHR 2.89; 95% CI, 1.32-6.29) and remained elevated at 1 year (19 [35%] vs 228 [25%]; aHR1.80; 95% CI, 1.02-3.17). These results were not influenced by treatment for diabetes (P>.4 for interaction). CONCLUSION: In a population-based sample of patients with community-acquired pneumonia, spontaneous admission hypoglycemia was independently associated with increased mortality during hospitalization that persisted to 1 year. Patients with hypoglycemia are an easily identified group that may warrant more intensive inpatient and postdischarge follow-up.
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