TITLE

Risk of Clostridium difficile diarrhea among hospital inpatients prescribed proton pump inhibitors: cohort and case--control studies

AUTHOR(S)
Dial, Sandra; Alrasadi, Khalid; Manoukian, Chantal; Huang, Allen; Menzies, Dick
PUB. DATE
July 2004
SOURCE
CMAJ: Canadian Medical Association Journal;7/6/2004, Vol. 171 Issue 1, p33
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background: Antibiotic disruption of the normal intestinal flora is a well-known risk factor for Clostridium difficile-associated di-arrhea. Reduced gastric acidity has been suggested as a risk factor, and we hypothesized that proton pump inhibitors, be-cause of their potency, may be an independent risk factor for this problem. Methods: For the cohort study we identified from a pharmacy database 1187 inpatients at a Montreal teaching hospital who received antibiotics over a 9-month period beginning in Au-gust 2002. We compared patients in this group who had also received a proton pump inhibitor or an H2 blocker with pa-tients who had not received acid suppressive therapy. Hospital laboratory reports of positive assay results for C. difficile toxin were used to ascertain cases in the cohort. To assess the possibility that proton pump inhibitors were prescribed to patients who were sicker and had other risk fac-tors for C. difficile infection, we did a case--control study at a second Montreal teaching hospital. Cases were defined as pa-tients who were positive for C. difficile toxin and who had a history of diarrhea ( n = 94). Control subjects were selected from among patients who had received an antibiotic and were matched to cases by ward, age within 5 years and class of antibiotics ( n= 94). Results: In the cohort study, C. difficile diarrhea developed in 81 (6.8%) of the 1187 patients who received antibiotics while in hospital. In a multivariate analysis, C. difficile diarrhea was significantly associated with use of proton pump inhibitors (adjusted odds ratio [OR] 2.1, 95% confidence interval [CI] 1.2--3.5), receipt of 3 or more antibiotics (OR 2.1, 95% CI 1.3-- 3.4) and admission to a medical ward (OR 4.1, 95% CI 2.3-- 7.3). In the case--control study C. difficile diarrhea was associ-ated with female sex (adjusted OR 2.1, 95% CI 1.1--4.0), prior renal failure (adjusted OR 4.3, 95% CI 1.5--11.9), hospital ad-mission...
ACCESSION #
13605338

 

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