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Thomas R McCune

EVMS, USA

Title: High dose vitamin C associated with acute kidney injury and mortality

Biography

Biography: Thomas R McCune

Abstract

Background: The effects of vitamin C on clinical outcomes in critically ill patients remain controversial due to inconclusive studies .Oxalic acid and oxalate toxicity have been shown to occur in myocardial tissue of patients with hereditary and possibly secondary hyperoxaluria  . This retrospective observational cohort study evaluated the effects of vitamin C therapy on acute kidney injury (AKI) and mortality among septic patients.

Methods: Electronic medical records of 1390 patients from an academic hospital who were categorized as Treatment (received at least one dose of 1.5g IV vitamin C, n=212) or Comparison (received no, or less than 1.5g IV vitamin C, n=1178) were reviewed. Propensity score matching was conducted to balance several covariates between groups. Multivariate logistic regressions were conducted predicting AKI and in-hospital mortality among the full sample and a sub-sample of patients seen in the ICU.

Results: Data revealed that vitamin C therapy was associated with increases in AKI (OR=2.07 95% CI [1.46-2.93]) and in-hospital mortality (OR= 1.67 95% CI [1.003-2.78]) after adjusting for demographic and clinical covariates. When stratified to examine ICU patients, vitamin C therapy remained a significant risk factor of AKI (OR=1.61 95% CI [1.09-2.39]) and provided no protective benefit against mortality (OR= 0.79 95% CI [0.48-1.31]). The authors recommend ongoing use of high dose vitamin C in sepsis should be appraised due to observed associations with AKI and death