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Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

541 questions · 556 findings · 112 reviews · Headline outcomes only

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No studies found 130 · 23.4%GRADE not reported 22 · 4%Very low 156 · 28.1%Low 151 · 27.2%Moderate 72 · 12.9%High 25 · 4.5%

H2 receptor antagonists vs placebo or no prophylaxis

Clinically important upper GI bleeding · people admitted to intensive care units

H2 receptor antagonists probably leads to lower clinically important upper GI bleeding compared with placebo or no prophylaxis (moderate certainty).

1 finding from 1 review

Bispectral index vs treatment guided by clinical assessment alone?

Duration of mechanical ventilation · Mechanically ventilated adults in the intensive care unit

BIS monitoring showed no clear difference in duration of mechanical ventilation (measured in days) compared with clinical assessment (low certainty).

1 finding from 1 review

Thrombopoietin mimetics vs placebo or usual care

Number of participants with at least 1 bleeding episode · people with haematological disorders undergoing intensive chemotherapy or stem cell transplantation

It is very uncertain whether thrombopoietin mimetics changes number of participants with at least 1 bleeding episode compared with placebo or standard care (very low certainty).

1 finding from 1 review

Intervention not reported

Number of participants with severe or life‐threatening bleeding · people with haematological disorders undergoing intensive chemotherapy or stem cell transplantation

It is very uncertain whether the intervention changes number of participants with severe or life‐threatening bleeding (very low certainty).

1 finding from 1 review