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Underlying Disease Severity as a Major Risk Factor for Nosocomial Clostridium difficile Diarrhea

Published online by Cambridge University Press:  02 January 2015

Lorraine Kyne ,
Stavros Sougioultzis ,
Lynne V. McFarland  and
Ciarán P. Kelly
Lorraine Kyne*
Affiliation:
Gerontology Division, Beth Israel Deaconess Medical Center, andHarvard Medical School, Boston, Massachusetts
Stavros Sougioultzis
Affiliation:
Gastroenterology Division, Beth Israel Deaconess Medical Center, andHarvard Medical School, Boston, Massachusetts
Lynne V. McFarland
Affiliation:
Department of Health Services, School of Public Health & Community Medicine, University of Washington, Seattle, Washington
Ciarán P. Kelly
Affiliation:
Gastroenterology Division, Beth Israel Deaconess Medical Center, andHarvard Medical School, Boston, Massachusetts
*
Gerontology Division, Rabb 440, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02215
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Abstract

Objective:

To determine the diagnostic accuracy of an index of underlying disease severity (Horn's index) in identifying patients with a high probability of having nosocomial Clostridium difficile diarrhea as a complication of antimicrobial therapy.

Design:

A prospective cohort study of 252 adult patients admitted to the hospital and receiving antibiotics. Risk factors for C. difficile diarrhea were first determined retrospectively in a different cohort of 300 hospitalized patients (primary cobort) and then prospectively in this cohort of 252 hospitalized patients receiving antibiotics (secondary cohort). At the time of hospital admission, disease was rated by clinicians as mild (1), moderate (2), severe (3), or extremely severe (4) using a modified Horn's index. Multivariable logistic regression analysis was used to determine the odds ratio (OR) for C. difficile diarrhea associated with increasing levels of disease severity.

Setting:

An urban teaching hospital affiliated with a medical school in Boston, Massachusetts.

Results:

The incidence of nosocomial C. difficile diarrhea was 8.7% in the primary cohort and 11% in the secondary cohort. In the prospective cohort study (secondary cohort), the OR for C. difficile diarrhea associated with extremely severe disease was 17.6 (95% confidence interval, 5.8 to 53.5). The sensitivity, specificity, and positive and negative predictive values of a Horn's index score of 3 or more (severe to extremely severe disease) as a predictor of nosocomial C. difficile diarrhea were 79%, 73%, 27%, and 96%, respectively.

Conclusions:

These findings provide a means of early stratification of hospitalized patients receiving antibiotics according to their risk for nosocomial C. difficile diarrhea. Patients with severe to extremely severe disease at the time of admission may benefit from careful monitoring of antibiotic prescribing and early attention to infection control issues. In the future, these “high-risk” patients may benefit from prophylaxis studies of novel agents being developed to prevent C. difficile diarrhea.

Type
Original Articles
Information
Infection Control & Hospital Epidemiology , Volume 23 , Issue 11 , November 2002 , pp. 653 - 659
Copyright
Copyright © The Society for Healthcare Epidemiology of America 2002

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