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Study flow diagram.
Figuras y tablas -
Figure 1

Study flow diagram.

Risk of bias summary: review authors' judgements about each risk of bias item for each included study.
Figuras y tablas -
Figure 2

Risk of bias summary: review authors' judgements about each risk of bias item for each included study.

Summary of findings for the main comparison. Perioperative antibiotics for prevention of endophthalmitis after cataract surgery

Perioperative antibiotics for prevention of endophthalmitis after cataract surgery

Population: participants undergoing cataract surgery

Settings: eye hospital or clinic

Outcome: risk of endophthalmitis after surgery

Perioperative prophylaxis versus no prophylaxis

Study ID

No. eyes and participants

Follow‐up

Comparison

(intervention vs comparator)

Risk of endophthalmitis by study group

RR (95% CI)
Treatment vs control

Certainty of the evidence
(GRADE)

Presumed cases*

Proven cases**

Presumed cases*

Proven cases**

Sobaci 2003

644 eyes of 640 participants

6 weeks

Treatment: BSS with antibiotics (vancomycin 20 mg/mL and gentamicin 8 mg/mL)

Not reported

0/322 (0%) eyes

Not reported

0.20 (0.01 to 4.15)

⊕⊝⊝⊝
Very low1,2

Control: BSS‐only irrigating infusion fluid

Not reported

2/322 (0.62%) eyes

ESCRS 2007

16,603 eyes of 16,603 participants

6 weeks

Treatment 1: combined intracameral cefuroxime and topical levofloxacin

2/4052 (0.05%) eyes

1/4052 (0.02%) eyes

0.14 (0.03 to 0.63)

0.10 (0.01 to 0.78)

⊕⊕⊕⊕
High

Treatment 2: intracameral cefuroxime 0.9%

3/4056 (0.07%) eyes

2/4056 (0.05%) eyes

0.21 (0.06 to 0.74)

0.20 (0.04 to 0.91)

⊕⊕⊕⊕
High

Treatment 3: topical levofloxacin 0.5%

10/4049 (0.25%) eyes

7/4049 (0.17%) eyes

0.72 (0.32 to 1.61)

0.70 (0.27 to 1.84)

⊕⊕⊕⊝
Moderate3

Control: placebo drops

14/4054 (0.35%) eyes

10/4054 (0.25%) eyes

Comparisons of combinations of antibiotics with specific antibiotics

Study ID

No. eyes and participants

Follow‐up

Interventions

Risk of endophthalmitis by study group

RR (95% CI)
Treatment 1 vs treatment 2

Certainty of the evidence
(GRADE)

Presumed cases*

Proven cases**

Presumed cases*

Proven cases**

Christy 1979

6618 eyes of 6618 participants

1 week

Treatment 1: combined prophylaxis (topical regimen + periocular penicillin at the time of surgery)

5/3309 (0.15%) eyes

Not reported

0.33 (0.12 to 0.92)

Not reported

⊕⊕⊕⊝
Moderate4

Treatment 2: topical regimen alone (chloramphenicol‐sulfadimidine)

15/3309 (0.45%) eyes

Not reported

ESCRS 2007

16,603 eyes of 16,603 participants

6 weeks

Treatment 1: combined intracameral cefuroxime and topical levofloxacin

2/4052 (0.05%) eyes

1/4052 (0.02%) eyes

Treatment 1 vs treatment 2: 0.67 (0.11 to 3.99)

Treatment 1 vs treatment 2: 0.50 (0.05 to 5.52)

⊕⊕⊕⊝
Moderate3

Treatment 2: intracameral cefuroxime 0.9%

3/4056 (0.07%) eyes

2/4056 (0.05%) eyes

Treatment 2 vs treatment 3: 0.30 (0.08 to 1.09)

Treatment 2 vs treatment 3: 0.29 (0.06 to 1.37)

⊕⊕⊕⊝
Moderate3

Treatment 3: topical levofloxacin 0.5%

10/4049 (0.25%) eyes

7/4049 (0.17%) eyes

Treatment 1 vs treatment 3: 0.20 (0.04 to 0.91)

Treatment 1 vs treatment 3: 0.14 (0.02 to 1.16)

⊕⊕⊕⊕
High

Mode of antibiotic delivery

Study ID

No. eyes and patients

Follow‐up

Interventions

Risk of endophthalmitis by study group

RR (95% CI)
Mode 1 vs mode 2

Certainty of the evidence
(GRADE)

Presumed cases*

Proven cases**

Presumed cases*

Proven cases**

Christy 1986

77,015 eyes of 77,015 participants

1 week

Mode 1: Anterior sub‐Tenon injections (subconjunctival)

38/39,752 (0.10%) eyes

Not reported

0.85 (0.55 to 1.32)

Not reported

⊕⊕⊕⊝
Moderate4

Mode 2: Posterior sub‐Tenon injections (retrobulbar)

42/37,263 (0.11%) eyes

Not reported

Cunha 2013

108 eyes of 108 participants

3 weeks

Treatment 1: fixed combination of topical gatifloxacin 0.3% and prednisolone acetate 1%

0/47 (0%) eyes

Not reported

0.43 (0.02 to 10.34)

Not reported

⊕⊝⊝⊝
Very low1,5

Treatment 2: individual instillation of topical gatifloxacin 0.3% and prednisolone acetate 1%

1/61 (2%) eyes

Not reported

GRADE Working Group grades of evidence
High‐certainty: Further research is very unlikely to change our confidence in the estimate of effect.
Moderate‐certainty: Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate.
Low‐certainty: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate.
Very low‐certainty: We are very uncertain about the estimate.

BSS: balanced salt solution; CI: confidence interval; RR: risk ratio.

*Presumed cases: includes both culture‐proven and clinically diagnosed cases of postoperative endophthalmitis.

**Proven cases: cases confirmed by at least one of Gram stain, culture, or polymerase chain reaction (PCR)

1 Downgraded for imprecision (‐2) as the study did not enroll a sufficient number of participants to detect differences between groups.

2 Downgraded for high risk of attrition bias (‐1) as the study authors excluded participants at the time of surgery based on the surgeon's discretion (number excluded not reported).

3 Downgraded for imprecision (‐1) as the confidence interval of the effect estimate between groups was wide.

4 Downgraded for indirectness (‐1) as the study was conducted more than 30 years ago and the techniques for cataract surgery have since changed substantially.

5 Downgraded for high risk of attrition bias (‐1) as the study authors excluded participants who did not return for follow‐up (16% of study population).

Figuras y tablas -
Summary of findings for the main comparison. Perioperative antibiotics for prevention of endophthalmitis after cataract surgery
Table 1. Visual acuity following endophthalmitis

Comparisons of specific antibiotics or combinations of antibiotics

Study ID

Groups

Proportion of eyes with final VA > 20/40 following endophthalmitis

RR (95% CI)
Group 1 vs group 2

Proportion of eyes with final VA < 20/200 following endophthalmitis

RR (95% CI)
Group 1 vs group 2

Presumed cases*

Proven cases**

Presumed cases*

Proven cases**

Presumed cases*

Proven cases**

Presumed cases*

Proven cases**

ESCRS 2007

Group 1: intracameral cefuroxime injection, with or without topical levofloxacin drops

2/5 (40%) eyes

1/3 (33.3%) eyes

0.69 (0.22 to 2.11)

0.57 (0.11 to 2.95)

0/5 (0%) eyes

0/3 (0%) eyes

0.46 (0.03 to 7.48)

0.50 (0.03 to 7.54)

Group 2: no injection, with or without topical levofloxacin drops

14/24 (58.3%) eyes

10/17 (58.1%) eyes

4/24 (16.7%) eyes

4/17 (23.5%) eyes

CI: confidence interval; final VA: visual acuity at time of last follow‐up visit (range 3 weeks to 8 months); VA: visual acuity.

*Presumed cases: includes both culture‐proven and clinically diagnosed cases of postoperative endophthalmitis.

**Proven cases: cases confirmed by at least one of Gram stain, culture, or polymerase chain reaction (PCR).

Figuras y tablas -
Table 1. Visual acuity following endophthalmitis