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Methodological quality graph: review authors' judgements about each methodological quality item presented as percentages across all included studies.
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Figure 1

Methodological quality graph: review authors' judgements about each methodological quality item presented as percentages across all included studies.

Methodological quality summary: review authors' judgements about each methodological quality item for each included study.
Figuras y tablas -
Figure 2

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

Comparison 1 Masks versus no masks, Outcome 1 Wound infection.
Figuras y tablas -
Analysis 1.1

Comparison 1 Masks versus no masks, Outcome 1 Wound infection.

Comparison 1. Masks versus no masks

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Wound infection Show forest plot

3

Odds Ratio (M‐H, Fixed, 95% CI)

Totals not selected

Figuras y tablas -
Comparison 1. Masks versus no masks