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JAC Advance Access published online on December 12, 2005
Journal of Antimicrobial Chemotherapy, doi:10.1093/jac/dki448
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© The Author 2005. Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org
Received June 16, 2005
Revised November 10, 2005
Accepted November 12, 2005

Systematic review

Empirical antibiotic monotherapy for febrile neutropenia: systematic review and meta-analysis of randomized controlled trials

Mical Paul 1 *, Dafna Yahav 2, Abigail Fraser 2, and Leonard Leibovici 1

1 Department of Medicine E, Rabin Medical Center, Beilinson Campus, 49100 Petah-Tiqva, Israel; Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel
2 Department of Medicine E, Rabin Medical Center, Beilinson Campus, 49100 Petah-Tiqva, Israel

* To whom correspondence should be addressed.
Mical Paul, E-mail: pil1pel{at}zahav.net.il


  Abstract

Objectives: Early, empirical broad-spectrum antibiotic treatment is the established practice for febrile neutropenia. Several {beta}-lactams are accepted for monotherapy. We asked whether patients' outcomes are influenced by the chosen {beta}-lactam.

Methods: Systematic review and meta-analysis of randomized controlled trials comparing anti-pseudomonal {beta}-lactams administered as empirical monotherapy for febrile neutropenia, with or without vancomycin. The search included The Cochrane Library, PubMed, Embase, Lilacs databases, bibliography, conference proceedings, trial registries and FDA new drug approvals. Two reviewers independently applied selection criteria, performed quality assessment and extracted the data. Trials assessing the same {beta}-lactam were pooled using the fixed effect model. Relative risks (RRs) with 95% confidence intervals (CIs) were calculated. The primary outcome assessed was all-cause mortality.

Results: Thirty-three trials fulfilled inclusion criteria. Cefepime was associated with higher all-cause mortality at 30 days than other {beta}-lactams (RR 1.44, 95% CI 1.06-1.94, 3123 participants). Carbapenems were associated with fewer treatment modifications, including addition of glycopeptides, than ceftazidime or other comparators. Adverse events were significantly more frequent with carbapenems, specifically pseudomembranous colitis (RR 1.94, 95% CI 1.24-3.04, 2025 participants). All-cause mortality was unaltered. Piperacillin/tazobactam was compared only with cefepime and carbapenems, in six trials. No significant differences were demonstrated with paucity of data for all-cause mortality.

Conclusions: The use of cefepime for febrile neutropenia is associated with increased mortality and should be carefully considered pending further analysis. Empirical use of carbapenems entails fewer treatment modifications, but an increased rate of pseudomembranous colitis. Ceftazidime, piperacillin/tazobactam, imipenem/cilastatin and meropenem appear to be suitable agents for monotherapy.

Keywords: {beta}-lactams; cefepime; ceftazidime; piperacillin/tazobactam; carbapenems.
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