Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

3,454 questions · 3,562 findings · 816 reviews · Headline outcomes only

No studies found 538 · 15.1%GRADE not reported 239 · 6.7%Very low 933 · 26.2%Low 1,041 · 29.2%Moderate 612 · 17.2%High 199 · 5.6%

Intervention not reported

Live birth ‐ Clomiphene citrate 5 days versus clomiphene citrate 10 days · ovulation induction in polycystic ovarian syndrome

The intervention may leads to lower live birth ‐ Clomiphene citrate 5 days versus clomiphene citrate 10… (low certainty).

1 finding from 1 review

Intervention not reported

Clinical pregnancy ‐ Clomiphene citrate 5 days versus clomiphene citrate 10 days · ovulation induction in polycystic ovarian syndrome

The intervention may leads to lower clinical pregnancy ‐ Clomiphene citrate 5 days versus clomiphene… (low certainty).

1 finding from 1 review

Intervention not reported

Multiple pregnancy ‐ Clomiphene citrate 5 days versus clomiphene citrate 10 days · ovulation induction in polycystic ovarian syndrome

It is very uncertain whether the intervention changes multiple pregnancy ‐ Clomiphene citrate 5 days versus clomiphene… (very low certainty).

1 finding from 1 review

Droperidol vs haloperidol

Mental state: mean score by 13 days (Scale for Quantification of Psychotic Symptom Severity, high = poor) · acute psychosis

Droperidol showed no clear difference in mental state: mean score by 13 days (Scale for Quantification of… compared with haloperidol (low certainty).

1 finding from 1 review

High‐frequency oscillation vs conventional ventilation

Mortality (at 30 days or until hospital discharge) · people with Acute Respiratory Distress Syndrome

It is very uncertain whether high‐frequency oscillation changes mortality (at 30 days or until hospital discharge) compared with conventional ventilation (very low certainty).

1 finding from 1 review

Heparin vs placebo

Symptomatic VTE · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

Heparin showed no clear difference in symptomatic VTE (DVT and PE) Treatment duration 28 ‐ 42 days compared with placebo (high certainty).

1 finding from 1 review

Vitamin K antagonists vs placebo

Major bleeding · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

Vitamin K antagonists showed no clear difference in bleeding ‐ major Treatment duration 28 ‐ 42 days compared with placebo (low certainty).

1 finding from 1 review

Vitamin K antagonists vs placebo

Clinically relevant non‐major bleeding Treatment duration 28 ‐ 42 days · people requiring prevention of venous thromboembolism following total hip or knee replacement or hip fracture repair

The review found no eligible studies for this question.

1 finding from 1 review