Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

493 questions · 509 findings · 56 reviews · Headline outcomes only

No studies found 149 · 29.3%GRADE not reported 9 · 1.8%Very low 128 · 25.1%Low 123 · 24.2%Moderate 79 · 15.5%High 21 · 4.1%

GnRHa treatment vs other medical therapies before any surgery

Preoperative bleeding: (PBAC < 75) ulipristal acetate 5 mg · women with uterine fibroids

GnRHa treatment showed no clear difference in preoperative bleeding: Reduction in bleeding to PBAC < 75 ulipristal… compared with other medical therapies before any surgery (moderate certainty).

1 finding from 1 review

GnRHa treatment vs other medical therapies before any surgery

Preoperative bleeding: Reduction in bleeding to PBAC < 75 ulipristal acetate 10 mg · women with uterine fibroids

GnRHa treatment showed no clear difference in preoperative bleeding: Reduction in bleeding to PBAC < 75 ulipristal… compared with other medical therapies before any surgery (moderate certainty).

1 finding from 1 review

Isopropyl alcohol vs Normal saline

Nausea duration (nausea‐free at end of treatment) Measured by participant self‐report or medical or nursing observation · adults and children having any type of surgical procedure under general anaesthesia, regional anaesthesia or sedation, as hospital…

The review found no eligible studies for this question.

1 finding from 1 review

Peppermint vs placebo

Nausea duration (nausea‐free at end of treatment) Measured by participant self‐report or medical or nursing observation · adults and children having any type of surgical procedure under general anaesthesia, regional anaesthesia or sedation, as hospital…

The review found no eligible studies for this question.

1 finding from 1 review

Antidepressants vs placebo: all studies

Tolerability of treatment: withdrawal for medical reasons · people with co‐occurring depression and alcohol dependence

Antidepressants showed no clear difference in tolerability of treatment: withdrawal for medical reasons compared with placebo: all studies (low certainty).

1 finding from 1 review

Intravenous thrombolytic treatment vs standard‐of‐care therapy

Symptomatic intracranial haemorrhage at · people with stroke upon awakening

Intravenous thrombolytic treatment showed no clear difference in symptomatic intracranial haemorrhage at compared with standard medical care (high certainty).

1 finding from 1 review

Surgery for Bell's palsy vs medical treatment (oral prednisolone) or no treatment

Complications and side effects · Bell's palsy

It is very uncertain whether surgery for Bell's palsy changes side effects and complications of treatmentMeasured by clinical… compared with medical treatment (oral prednisolone) or no treatment (very low certainty).

1 finding from 1 review