Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,788 questions · 1,849 findings · 336 reviews

No studies found 245 · 13.3%GRADE not reported 126 · 6.8%Very low 612 · 33.1%Low 512 · 27.7%Moderate 305 · 16.5%High 49 · 2.7%

Intervention not reported

Live birth or ongoing pregnancy Short protocol vs long protocol · subfertile women

The intervention showed no clear difference in live birth or ongoing pregnancy Short protocol vs long protocol (low certainty).

1 finding from 1 review

Intervention not reported

Live birth/ongoing pregnancy ‐ short vs long protocol · subfertile women

The intervention showed no clear difference in live birth/ongoing pregnancy ‐ short vs long protocol (low certainty).

1 finding from 1 review

Intervention not reported

OHSS ‐ short vs long protocol · subfertile women

The review found no eligible studies for this question.

1 finding from 1 review

Antihistamines vs placebo

Change in severity of overall symptoms: short‐term (1 to 2 days) Subjective severity score · patients with common cold

Antihistamines probably leads to lower change in severity of overall symptoms: short‐term Subjective… compared with placebo (moderate certainty).

1 finding from 1 review

Sedating antihistamines vs placebo

Change in severity of overall symptoms: short‐term (1 to 2 days) Subjective severity score · patients with common cold

Sedating antihistamines leads to lower change in severity of overall symptoms: short‐term (1 to 2 days)… compared with placebo (high certainty).

1 finding from 1 review

Herbal medicines vs antibiotics alone

Remission · participants with acne

Herbal medicine showed no clear difference in secondary outcome: number of participants with remission (ITT‐best… compared with antibiotics (low certainty).

2 findings from 1 review

Intervention not reported

Short‐term death ( · patients with acute ischaemic stroke
1 finding from 1 review

Intervention not reported

Short‐term disability assessed by the Barthel Index ( · patients with acute ischaemic stroke
1 finding from 1 review