Efficacy of short-course antibiotic regimens for community-acquired pneumonia: a meta-analysis
Jonathan Z Li1, Lisa G Winston, Dan H Moore
1Department of Medicine, San Francisco VA Medical Center, University of California, San Francisco, CA 94143-0862, USA. jli22@partners.org
Purpose:
There is little consensus on the most appropriate duration of antibiotic treatment for community-acquired pneumonia. The goal of this study is to systematically review randomized controlled trials comparing short-course and extended-course antibiotic regimens for community-acquired pneumonia.
Methods:
We searched MEDLINE, Embase, and CENTRAL, and reviewed reference lists from 1980 through June 2006. Studies were included if they were randomized controlled trials that compared short-course (7 days or less) versus extended-course (>7 days) antibiotic monotherapy for community-acquired pneumonia in adults. The primary outcome measure was failure to achieve clinical improvement.
Results:
We found 15 randomized controlled trials matching our inclusion and exclusion criteria comprising 2796 total subjects. Short-course regimens primarily studied the use of azithromycin (n=10), but trials examining beta-lactams (n=2), fluoroquinolones (n=2), and ketolides (n=1) were found as well. Of the extended-course regimens, 3 studies utilized the same antibiotic, whereas 9 involved an antibiotic of the same class. Overall, there was no difference in the risk of clinical failure between the short-course and extended-course regimens (0.89, 95% confidence interval [CI], 0.78-1.02). In addition, there were no differences in the risk of mortality (0.81, 95% CI, 0.46-1.43) or bacteriologic eradication (1.11, 95% CI, 0.76-1.62). In subgroup analyses, there was a trend toward favorable clinical efficacy for the short-course regimens in all antibiotic classes (range of relative risk, 0.88-0.94).
Conclusions:
The available studies suggest that adults with mild to moderate community-acquired pneumonia can be safely and effectively treated with an antibiotic regimen of 7 days or less. Reduction in patient exposure to antibiotics may limit the increasing rates of antimicrobial drug resistance, decrease cost, and improve patient adherence and tolerability.
Insights
Short-course antibiotic treatment (7 days or less) is as effective as longer courses for community-acquired pneumonia. This approach may reduce antibiotic resistance and improve patient outcomes.
Area of Science:
- Infectious Diseases
- Clinical Pharmacology
- Evidence-Based Medicine
Background:
- Optimal antibiotic duration for community-acquired pneumonia (CAP) lacks consensus.
- Antibiotic resistance is a growing global health concern.
- Patient adherence and tolerability can be influenced by treatment length.
Purpose of the Study:
- To systematically review randomized controlled trials (RCTs) comparing short-course versus extended-course antibiotic regimens for CAP.
- To evaluate the efficacy and safety of different antibiotic durations for CAP treatment.
Main Methods:
- Searched MEDLINE, Embase, and CENTRAL databases from 1980 to June 2006.
- Included RCTs comparing short-course (≤7 days) versus extended-course (>7 days) antibiotic monotherapy for adult CAP.
- Primary outcome was clinical improvement failure; secondary outcomes included mortality and bacteriologic eradication.
Main Results:
- Fifteen RCTs involving 2796 patients were analyzed.
- No significant difference in clinical failure risk between short-course and extended-course regimens (RR 0.89, 95% CI 0.78-1.02).
- Mortality and bacteriologic eradication rates also showed no significant differences.
Conclusions:
- Adults with mild to moderate CAP can be effectively treated with antibiotic courses of 7 days or less.
- Shorter antibiotic exposure may help mitigate antimicrobial resistance.
- Reduced treatment duration can potentially lower costs and enhance patient adherence and tolerability.
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