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Risk of bias summary: review authors' judgements about each risk of bias item for each included study.
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Figure 1

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

Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies.
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Figure 2

Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies.

Comparison 1 Cervical dilatation versus no dilatation, Outcome 1 Blood loss (ml).
Figuras y tablas -
Analysis 1.1

Comparison 1 Cervical dilatation versus no dilatation, Outcome 1 Blood loss (ml).

Comparison 1 Cervical dilatation versus no dilatation, Outcome 2 Blood transfusion.
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Analysis 1.2

Comparison 1 Cervical dilatation versus no dilatation, Outcome 2 Blood transfusion.

Comparison 1 Cervical dilatation versus no dilatation, Outcome 3 Postoperative haemoglobin (g/dl).
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Analysis 1.3

Comparison 1 Cervical dilatation versus no dilatation, Outcome 3 Postoperative haemoglobin (g/dl).

Comparison 1 Cervical dilatation versus no dilatation, Outcome 4 Drop in baseline haemoglobin > 0.5 g/dl.
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Analysis 1.4

Comparison 1 Cervical dilatation versus no dilatation, Outcome 4 Drop in baseline haemoglobin > 0.5 g/dl.

Comparison 1 Cervical dilatation versus no dilatation, Outcome 5 Drop in baseline haemoglobin (g/dl).
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Analysis 1.5

Comparison 1 Cervical dilatation versus no dilatation, Outcome 5 Drop in baseline haemoglobin (g/dl).

Comparison 1 Cervical dilatation versus no dilatation, Outcome 6 Hematocrit at postoperative period (%).
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Analysis 1.6

Comparison 1 Cervical dilatation versus no dilatation, Outcome 6 Hematocrit at postoperative period (%).

Comparison 1 Cervical dilatation versus no dilatation, Outcome 7 Febrile morbidity.
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Analysis 1.7

Comparison 1 Cervical dilatation versus no dilatation, Outcome 7 Febrile morbidity.

Comparison 1 Cervical dilatation versus no dilatation, Outcome 8 Endometritis.
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Analysis 1.8

Comparison 1 Cervical dilatation versus no dilatation, Outcome 8 Endometritis.

Comparison 1 Cervical dilatation versus no dilatation, Outcome 9 Wound infection.
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Analysis 1.9

Comparison 1 Cervical dilatation versus no dilatation, Outcome 9 Wound infection.

Comparison 1 Cervical dilatation versus no dilatation, Outcome 10 Urinary tract infection.
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Analysis 1.10

Comparison 1 Cervical dilatation versus no dilatation, Outcome 10 Urinary tract infection.

Comparison 1 Cervical dilatation versus no dilatation, Outcome 11 Infectious morbidity.
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Analysis 1.11

Comparison 1 Cervical dilatation versus no dilatation, Outcome 11 Infectious morbidity.

Comparison 1 Cervical dilatation versus no dilatation, Outcome 12 Operative time (mins).
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Analysis 1.12

Comparison 1 Cervical dilatation versus no dilatation, Outcome 12 Operative time (mins).

Comparison 1. Cervical dilatation versus no dilatation

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Blood loss (ml) Show forest plot

1

400

Mean Difference (IV, Fixed, 95% CI)

‐48.49 [‐88.75, ‐8.23]

2 Blood transfusion Show forest plot

1

400

Risk Ratio (M‐H, Fixed, 95% CI)

0.0 [0.0, 0.0]

3 Postoperative haemoglobin (g/dl) Show forest plot

2

552

Mean Difference (IV, Fixed, 95% CI)

‐0.05 [‐0.17, 0.06]

4 Drop in baseline haemoglobin > 0.5 g/dl Show forest plot

1

183

Risk Ratio (M‐H, Fixed, 95% CI)

0.96 [0.65, 1.40]

5 Drop in baseline haemoglobin (g/dl) Show forest plot

1

152

Mean Difference (IV, Fixed, 95% CI)

‐0.51 [‐1.28, 0.26]

6 Hematocrit at postoperative period (%) Show forest plot

1

400

Mean Difference (IV, Fixed, 95% CI)

0.01 [‐0.18, 0.20]

7 Febrile morbidity Show forest plot

3

735

Risk Ratio (M‐H, Fixed, 95% CI)

1.07 [0.52, 2.21]

8 Endometritis Show forest plot

2

552

Risk Ratio (M‐H, Fixed, 95% CI)

0.6 [0.15, 2.48]

9 Wound infection Show forest plot

3

735

Risk Ratio (M‐H, Fixed, 95% CI)

0.9 [0.37, 2.17]

10 Urinary tract infection Show forest plot

1

400

Risk Ratio (M‐H, Fixed, 95% CI)

1.0 [0.29, 3.40]

11 Infectious morbidity Show forest plot

1

400

Risk Ratio (M‐H, Fixed, 95% CI)

0.91 [0.51, 1.61]

12 Operative time (mins) Show forest plot

1

400

Mean Difference (IV, Fixed, 95% CI)

‐1.84 [‐2.21, ‐1.47]

Figuras y tablas -
Comparison 1. Cervical dilatation versus no dilatation