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Methodological quality graph: review authors' judgements about each methodological quality item presented as percentages across all included studies.
Figuras y tablas -
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 OCP versus naproxen, Outcome 1 Menstrual blood loss (assessed objectively).
Figuras y tablas -
Analysis 1.1

Comparison 1 OCP versus naproxen, Outcome 1 Menstrual blood loss (assessed objectively).

Comparison 2 OCP versus danazol, Outcome 1 Menstrual blood loss (assessed objectively).
Figuras y tablas -
Analysis 2.1

Comparison 2 OCP versus danazol, Outcome 1 Menstrual blood loss (assessed objectively).

Comparison 3 OCP versus mefenamic acid (all), Outcome 1 Menstrual blood loss (assessed objectively).
Figuras y tablas -
Analysis 3.1

Comparison 3 OCP versus mefenamic acid (all), Outcome 1 Menstrual blood loss (assessed objectively).

Comparison 1. OCP versus naproxen

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Menstrual blood loss (assessed objectively) Show forest plot

1

12

Mean Difference (IV, Fixed, 95% CI)

8.37 [‐27.31, 44.05]

Figuras y tablas -
Comparison 1. OCP versus naproxen
Comparison 2. OCP versus danazol

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Menstrual blood loss (assessed objectively) Show forest plot

1

12

Mean Difference (IV, Fixed, 95% CI)

19.27 [‐24.47, 63.01]

Figuras y tablas -
Comparison 2. OCP versus danazol
Comparison 3. OCP versus mefenamic acid (all)

Outcome or subgroup title

No. of studies

No. of participants

Statistical method

Effect size

1 Menstrual blood loss (assessed objectively) Show forest plot

1

26

Mean Difference (IV, Fixed, 95% CI)

‐17.49 [‐62.77, 27.79]

Figuras y tablas -
Comparison 3. OCP versus mefenamic acid (all)