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. 2023 Mar 13;3(3):CD001211.
doi: 10.1002/14651858.CD001211.pub4.

Antibiotics versus placebo for acute bacterial conjunctivitis

Affiliations

Antibiotics versus placebo for acute bacterial conjunctivitis

Yu-Yen Chen et al. Cochrane Database Syst Rev. .

Abstract

Background: Acute bacterial conjunctivitis is an infection of the conjunctiva and is one of the most common ocular disorders in primary care. Antibiotics are generally prescribed on the basis that they may speed recovery, reduce persistence, and prevent keratitis. However, many cases of acute bacterial conjunctivitis are self-limited, resolving without antibiotic therapy. This Cochrane Review was first published in The Cochrane Library in 1999, then updated in 2006, 2012, and 2022.

Objectives: To assess the benefits and side effects of antibiotic therapy in the management of acute bacterial conjunctivitis.

Search methods: We searched CENTRAL (which contains the Cochrane Eyes and Vision Group Trials Register) (The Cochrane Library 2022, Issue 5), MEDLINE (January 1950 to May 2022), Embase (January 1980 to May 2022), the metaRegister of Controlled Trials (mRCT) (www.controlled-trials.com), ClinicalTrials.gov (www.

Clinicaltrials: gov), and the WHO International Clinical Trials Registry Platform (ICTRP) (www.who.int/ictrp/search/en). We did not use any date or language restrictions in the electronic searches for trials. We last searched the electronic databases in May 2022. SELECTION CRITERIA: We included randomized controlled trials (RCTs) in which any form of antibiotic treatment, with or without steroid, had been compared with placebo/vehicle in the management of acute bacterial conjunctivitis. This included topical and systemic antibiotic treatments.

Data collection and analysis: Two authors independently reviewed the titles and abstracts of identified studies. We assessed the full text of all potentially relevant studies and determined the included RCTs, which were further assessed for risk of bias using Cochrane methodology. We performed data extraction in a standardized manner and conducted random-effects meta-analyses using RevMan Web.

Main results: We included 21 eligible RCTs, 10 of which were newly identified in this update. A total of 8805 participants were randomized. All treatments were topical in the form of drops or ointment. The trials were heterogeneous in terms of their eligibility criteria, the nature of the intervention (antibiotic drug class, which included fluoroquinolones [FQs] and non-FQs; dosage frequency; duration of treatment), the outcomes assessed and the time points of assessment. We judged one trial to be of high risk of bias, four as low risk of bias, and the others as raising some concerns. Based on intention-to-treat (ITT) population, antibiotics likely improved clinical cure (resolution of clinical symptoms or signs) by 26% (RR 1.26, 95% CI 1.09 to 1.46; 5 trials, 1474 participants; moderate certainty) as compared with placebo. Subgroup analysis showed no differences by antibiotic class (P = 0.67) or treatment duration (P = 0.60). In the placebo group, 55.5% (408/735) of participants had spontaneous clinical resolution by days 4 to 9 versus 68.2% (504/739) of participants treated with an antibiotic. Based on modified ITT population, in which participants were analyzed after randomization on the basis of positive microbiological culture, antibiotics likely increased microbiological cure (RR 1.53, 95% CI 1.34 to 1.74; 10 trials, 2827 participants) compared with placebo at the end of therapy; there were no subgroup differences by drug class (P = 0.60). No study evaluated the cost-effectiveness of antibiotic treatment. Patients receiving antibiotics had a lower risk of treatment incompletion than those in the placebo group (RR 0.64, 95% CI 0.52 to 0.78; 13 trials, 5573 participants; moderate certainty) and were 27% less likely to have persistent clinical infection (RR 0.73, 95% CI 0.65 to 0.81; 19 trials, 5280 participants; moderate certainty). There was no evidence of serious systemic side effects reported in either the antibiotic or placebo group (very low certainty). When compared with placebo, FQs (RR 0.70, 95% CI 0.54 to 0.90) but not non-FQs (RR 4.05, 95% CI 1.36 to 12.00) may result in fewer participants with ocular side effects. However, the estimated effects were of very low certainty.

Authors' conclusions: The findings of this update suggest that the use of topical antibiotics is associated with a modestly improved chance of resolution in comparison to the use of placebo. Since no evidence of serious side effects was reported, use of antibiotics may therefore be considered to achieve better clinical and microbiologic efficacy than placebo. Increasing the proportion of participants with clinical cure or increasing the speed of recovery or both are important for individual return to work or school, allowing people to regain quality of life. Future studies may examine antiseptic treatments with topical antibiotics for reasons of cost and growing antibiotic resistance.

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Conflict of interest statement

Yu‐Yen Chen: declared no conflicts of interest. Su‐Hsun Liu: reported a grant from the National Eye Institute, National Institutes of Health, USA; payment to institution. Onno CP van Schayck: no declaration of interest to be reported Ulugbek Nurmatov: no declaration of interest to be reported Irene C Kuo: reported partial salary support from the National Eye Institute, National Institutes of Health, for her editorial work for the Cochrane review.

Figures

1
1
PRISMA flow diagram
2
2
Risk of bias results across five domains of individual trials that reported on clinical cure. Abbreviations: mITT, modofied intention‐to‐treat population; ITT, intention‐to‐treat population.
3
3
4
4
5
5
6
6
7
7
1.1
1.1. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 1: Clinical cure at end of therapy ‐ ITT population
1.2
1.2. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 2: Clinical cure at end of therapy ‐ mITT population
1.3
1.3. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 3: Clinical cure at test of cure ‐ mITT population
1.4
1.4. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 4: Clinical cure at end of therapy ‐ ITT population, by treatment duration
1.5
1.5. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 5: Clinical cure at end of therapy ‐ mITT population, by treatment duration
1.6
1.6. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 6: Microbiological efficacy at end of therapy ‐ ITT population
1.7
1.7. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 7: Microbiological efficacy at end of therapy ‐ mITT population
1.8
1.8. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 8: Microbiological efficacy at test of cure ‐ mITT population
1.9
1.9. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 9: Treatment incompletion
1.10
1.10. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 10: Persistent clinical infection
1.11
1.11. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 11: Persistent clinical infection ‐ by definition
1.12
1.12. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 12: Persistent clinical infection ‐ by time point
1.13
1.13. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 13: Treatment‐related ocular adverse events ‐ risk ratio
1.14
1.14. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 14: Treatment‐related ocular adverse events ‐ rate ratio
1.15
1.15. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 15: Treatment‐related ocular adverse events ‐ rate difference per 1000 person‐days
1.16
1.16. Analysis
Comparison 1: Antibiotics vs placebo, Outcome 16: Non‐ocular adverse events
2.1
2.1. Analysis
Comparison 2: Antibiotics vs placebo ‐ sensitivity analysis and post hoc subgroup analysis, Outcome 1: Clinical cure at end of therapy ‐ mITT population, excluding trials of high risk bias
2.2
2.2. Analysis
Comparison 2: Antibiotics vs placebo ‐ sensitivity analysis and post hoc subgroup analysis, Outcome 2: Microbiological efficacy at end of therapy ‐ mITT population, excluding age < 1 month or no reporting of age limit
2.3
2.3. Analysis
Comparison 2: Antibiotics vs placebo ‐ sensitivity analysis and post hoc subgroup analysis, Outcome 3: Clinical cure at test of cure ‐ mITT population, excluding Karpecki 2009
2.4
2.4. Analysis
Comparison 2: Antibiotics vs placebo ‐ sensitivity analysis and post hoc subgroup analysis, Outcome 4: Microbiological efficacy at test of cure ‐ mITT population, excluding Karpecki 2009
2.5
2.5. Analysis
Comparison 2: Antibiotics vs placebo ‐ sensitivity analysis and post hoc subgroup analysis, Outcome 5: Persistent clinical infection, excluding Karpecki 2009
2.6
2.6. Analysis
Comparison 2: Antibiotics vs placebo ‐ sensitivity analysis and post hoc subgroup analysis, Outcome 6: Treatment‐related ocular adverse events ‐ rate ratio, excluding Karpecki 2009
2.7
2.7. Analysis
Comparison 2: Antibiotics vs placebo ‐ sensitivity analysis and post hoc subgroup analysis, Outcome 7: Treatment‐related ocular adverse events ‐ risk ratio, excluding Comstock 2012
2.8
2.8. Analysis
Comparison 2: Antibiotics vs placebo ‐ sensitivity analysis and post hoc subgroup analysis, Outcome 8: Treatment‐related ocular adverse events ‐ rate difference per 1000 person‐days, excluding Comstock 2012

Update of

References

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References to studies excluded from this review

Belfort 2012 {published data only}
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References to other published versions of this review

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