Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,695 questions · 4,979 findings · 433 reviews

No studies found 998 · 20%GRADE not reported 1,140 · 22.9%Very low 1,024 · 20.6%Low 1,029 · 20.7%Moderate 636 · 12.8%High 152 · 3.1%

Combined oral contraceptive pill vs any other medical treatment

Self‐reported pain (dysmenorrhoea) (dichotomous data) ‐ reduction of pain to zero at 6 months' · women with endometriosis

It is very uncertain whether combined oral contraceptive pill changes self‐reported pain (dysmenorrhoea) (dichotomous data): reduction of… compared with other medical treatment (very low certainty).

2 findings from 1 review

Polaprezinc vs Azulene oral rinse

Oral pain · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Polaprezinc led to lower oral pain (severe, > 2 on 0-3 scale) compared with azulene oral rinse; GRADE not reported.

1 finding from 1 review

Combined oral contraceptive pill vs no pretreatment

Live birth or ongoing pregnancy · women undergoing assisted reproduction

Combined oral contraceptive pill probably leads to lower live birth or ongoing pregnancy (COCP + Ant vs Ant) compared with no pretreatment (moderate certainty).

2 findings from 1 review

Combined oral contraceptive pill vs no pretreatment

Pregnancy loss · women undergoing assisted reproduction

Combined oral contraceptive pill showed no clear difference in pregnancy loss (COCP + Ant vs Ant) compared with no pretreatment (moderate certainty).

2 findings from 1 review

Combined oral contraceptive pill vs no pretreatment

Multiple pregnancy rate · women undergoing assisted reproduction

Combined oral contraceptive pill showed no clear difference in multiple pregnancy rate (COCP + Ant vs Ant) compared with no pretreatment (low certainty).

2 findings from 1 review

Combined oral contraceptive pill vs no pretreatment

OHSS · women undergoing assisted reproduction

Combined oral contraceptive pill showed no clear difference in OHSS rate (COCP + Ant vs Ant) compared with no pretreatment (low certainty).

2 findings from 1 review

Polaprezinc vs Azulene oral rinse

Disability of oral intake · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region

Polaprezinc showed no clear difference in disability of oral intake compared with azulene oral rinse; GRADE not reported.

1 finding from 1 review