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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.
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Figure 2

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

Comparison 1 Drape versus no drape, Outcome 1 Wound infection.
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Analysis 1.1

Comparison 1 Drape versus no drape, Outcome 1 Wound infection.

Comparison 1 Drape versus no drape, Outcome 2 Length of stay.
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Analysis 1.2

Comparison 1 Drape versus no drape, Outcome 2 Length of stay.

Comparison 2 One‐minute alcohol scrub with iodophor‐drape versus five‐minute iodophor scrub without drape, Outcome 1 Wound infection.
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Analysis 2.1

Comparison 2 One‐minute alcohol scrub with iodophor‐drape versus five‐minute iodophor scrub without drape, Outcome 1 Wound infection.

Comparison 2 One‐minute alcohol scrub with iodophor‐drape versus five‐minute iodophor scrub without drape, Outcome 2 Endomyometritis.
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Analysis 2.2

Comparison 2 One‐minute alcohol scrub with iodophor‐drape versus five‐minute iodophor scrub without drape, Outcome 2 Endomyometritis.

Comparison 2 One‐minute alcohol scrub with iodophor‐drape versus five‐minute iodophor scrub without drape, Outcome 3 Reduction of skin bacteria colony counts.
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Analysis 2.3

Comparison 2 One‐minute alcohol scrub with iodophor‐drape versus five‐minute iodophor scrub without drape, Outcome 3 Reduction of skin bacteria colony counts.

Comparison 3 Parachlorometaxylenol with iodine versus iodine alone, Outcome 1 Wound infection.
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Analysis 3.1

Comparison 3 Parachlorometaxylenol with iodine versus iodine alone, Outcome 1 Wound infection.

Comparison 3 Parachlorometaxylenol with iodine versus iodine alone, Outcome 2 Endometritis.
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Analysis 3.2

Comparison 3 Parachlorometaxylenol with iodine versus iodine alone, Outcome 2 Endometritis.

Comparison 1. Drape versus no drape

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Wound infection Show forest plot

2

1294

Risk Ratio (M‐H, Fixed, 95% CI)

1.29 [0.97, 1.71]

1.1 Iodine

1

691

Risk Ratio (M‐H, Fixed, 95% CI)

1.42 [0.98, 2.04]

1.2 Chlorhexidine

1

603

Risk Ratio (M‐H, Fixed, 95% CI)

1.11 [0.70, 1.76]

2 Length of stay Show forest plot

1

603

Mean Difference (IV, Fixed, 95% CI)

0.10 [‐0.27, 0.46]

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Comparison 1. Drape versus no drape
Comparison 2. One‐minute alcohol scrub with iodophor‐drape versus five‐minute iodophor scrub without drape

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Wound infection Show forest plot

1

79

Risk Ratio (M‐H, Fixed, 95% CI)

0.0 [0.0, 0.0]

2 Endomyometritis Show forest plot

1

79

Risk Ratio (M‐H, Fixed, 95% CI)

1.62 [0.29, 9.16]

3 Reduction of skin bacteria colony counts Show forest plot

1

79

Mean Difference (IV, Fixed, 95% CI)

0.07 [‐0.34, 0.48]

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Comparison 2. One‐minute alcohol scrub with iodophor‐drape versus five‐minute iodophor scrub without drape
Comparison 3. Parachlorometaxylenol with iodine versus iodine alone

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Wound infection Show forest plot

1

50

Risk Ratio (M‐H, Fixed, 95% CI)

0.33 [0.04, 2.99]

2 Endometritis Show forest plot

1

50

Risk Ratio (M‐H, Fixed, 95% CI)

0.88 [0.56, 1.38]

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Comparison 3. Parachlorometaxylenol with iodine versus iodine alone