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Methodological quality summary: review authors' judgements about each methodological quality item for each included study.
Figuras y tablas -
Figure 1

Methodological quality summary: review authors' judgements about each methodological quality item for each included study.

Comparison 1 Antibiotic prophylaxis versus no treatment for perineal tear, Outcome 1 Infection rate at 2 weeks postpartum.
Figuras y tablas -
Analysis 1.1

Comparison 1 Antibiotic prophylaxis versus no treatment for perineal tear, Outcome 1 Infection rate at 2 weeks postpartum.

Comparison 1 Antibiotic prophylaxis versus no treatment for perineal tear, Outcome 2 Infection rate at 6 weeks postpartum.
Figuras y tablas -
Analysis 1.2

Comparison 1 Antibiotic prophylaxis versus no treatment for perineal tear, Outcome 2 Infection rate at 6 weeks postpartum.

Summary of findings for the main comparison. Antibiotic prophylaxis versus no treatment for perineal tear for third‐ and fourth‐degree perineal tear during vaginal birth

Antibiotic prophylaxis versus no treatment for perineal tear for third‐ and fourth‐degree perineal tear during vaginal birth

Patient or population: Women with third‐ and fourth‐degree perineal tear during vaginal birth
Settings: A hospital in USA
Intervention: Antibiotic prophylaxis versus no treatment for perineal tear

Outcomes

Illustrative comparative risks* (95% CI)

Relative effect
(95% CI)

No of Participants
(studies)

Quality of the evidence
(GRADE)

Comments

Assumed risk

Corresponding risk

Control

Antibiotic prophylaxis versus no treatment for perineal tear

Infection rate at 2 weeks postpartum ‐ perineal wound infection in third‐ or fourth‐degree tear

Study population

RR 0.34
(0.12 to 0.96)

107
(1 study)

⊕⊕⊕⊝
moderate1,2

241 per 1000

82 per 1000
(29 to 232)

Moderate

241 per 1000

82 per 1000
(29 to 231)

Infection rate at 6 weeks postpartum ‐ perineal wound infection in third‐ or fourth‐degree tear

Study population

RR 0.38
(0.13 to 1.09)

128
(1 study)

⊕⊕⊝⊝
low1,2,3

192 per 1000

73 per 1000
(25 to 209)

Moderate

192 per 1000

73 per 1000
(25 to 209)

Fever or puerperal febrile morbidity

Not estimable

0 study

See comment

This outcome was not reported in the one included study.

*The basis for the assumed risk (e.g. the median control group risk across studies) is provided in footnotes. The corresponding risk (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).
CI: Confidence interval; RR: Risk ratio;

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

1 Small sample size and not met optimal information size (OIS) criteria.
2 We could not judge inconsistency due to the inclusion of only one study.
3 Confidence interval overlaps no effect.

Figuras y tablas -
Summary of findings for the main comparison. Antibiotic prophylaxis versus no treatment for perineal tear for third‐ and fourth‐degree perineal tear during vaginal birth
Comparison 1. Antibiotic prophylaxis versus no treatment for perineal tear

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Infection rate at 2 weeks postpartum Show forest plot

1

107

Risk Ratio (M‐H, Fixed, 95% CI)

0.34 [0.12, 0.96]

1.1 Perineal wound infection in third‐ or fourth‐degree tear

1

107

Risk Ratio (M‐H, Fixed, 95% CI)

0.34 [0.12, 0.96]

1.2 Perineal wound infection in third‐degree tear

0

0

Risk Ratio (M‐H, Fixed, 95% CI)

0.0 [0.0, 0.0]

1.3 Perineal wound infection in fourth‐degree tear

0

0

Risk Ratio (M‐H, Fixed, 95% CI)

0.0 [0.0, 0.0]

2 Infection rate at 6 weeks postpartum Show forest plot

1

128

Risk Ratio (M‐H, Fixed, 95% CI)

0.38 [0.13, 1.09]

2.1 Perineal wound infection in third‐ or fourth‐degree tear

1

128

Risk Ratio (M‐H, Fixed, 95% CI)

0.38 [0.13, 1.09]

2.2 Perineal wound infection in third‐degree tear

0

0

Risk Ratio (M‐H, Fixed, 95% CI)

0.0 [0.0, 0.0]

2.3 Perineal wound infection in fourth‐degree tear

0

0

Risk Ratio (M‐H, Fixed, 95% CI)

0.0 [0.0, 0.0]

Figuras y tablas -
Comparison 1. Antibiotic prophylaxis versus no treatment for perineal tear