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What do systematic reviews say?

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Evidence found and GRADE certainty

90 questions · 94 findings · 28 reviews · Headline outcomes only

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No studies found 32 · 34%GRADE not reported 7 · 7.4%Very low 21 · 22.3%Low 22 · 23.4%Moderate 12 · 12.8%High 0 · 0%

Prophylactic platelet transfusion vs non prophylactic or therapeutic platelet transfusion

Mortality: secondary to bleeding · People with a haematological disorder

Prophylactic platelet transfusion showed no clear difference in mortality: Secondary to bleeding compared with non prophylactic or therapeutic platelet transfusion (low certainty).

1 finding from 1 review

Prophylactic platelet transfusion prior to surgery vs no prophylactic platelet transfusion prior to surgery

All‐cause mortality within 30 days of surgery · people with a low platelet count

It is very uncertain whether prophylactic platelet transfusion prior to surgery changes all‐cause mortality within 30 days of surgery compared with no prophylactic platelet transfusion prior to surgery (very low certainty).

1 finding from 1 review

Therapeutic or non‐prophylactic platelet transfusion vs prophylactic platelet transfusion

Mortality from all causes up to 30 days from study entry · patients with haematological disorders undergoing myelosuppressive chemotherapy or stem cell transplantation
1 finding from 1 review

Prophylactic platelet transfusions with low‐dose schedule vs prophylactic platelet transfusions with standard‐dose schedule

Mortality from all causes up to 30 days from study entry · People with a haematological disorder

Prophylactic platelet transfusions with low‐dose schedule showed no clear difference in mortality from all causes up to 30 days from study entry compared with prophylactic platelet transfusions with standard‐dose schedule (low certainty).

1 finding from 1 review

Prophylactic platelet transfusion with one dose schedule vs prophylactic platelet transfusions with another dose schedule

Mortality: secondary to bleeding · People with a haematological disorder
2 findings from 1 review

Prophylactic plasma transfusion before surgery/invasive procedures vs no prophylactic plasma transfusion before surgery/invasive procedures (colloid, crystalloid, placebo, or no treatment)

All‐cause mortality up to 30 days № of participants: 72 (1 RCT) · patients undergoing non‐cardiac surgery/invasive procedures

It is very uncertain whether prophylactic plasma transfusion before surgery/invasive procedures changes all‐cause mortality up to 30 days № of participants: 72 (1 RCT) compared with no prophylactic plasma transfusion before surgery/invasive… (very low certainty).

1 finding from 1 review

Prophylactic platelet transfusion vs platelet‐poor plasma

Mortality: secondary to bleeding · People with a haematological disorder

It is very uncertain whether prophylactic platelet transfusion changes mortality: secondary to bleeding compared with platelet‐poor plasma (very low certainty).

1 finding from 1 review

Prophylactic corticosteroids vs placebo or no corticosteroids

Mortality within the longest · adults diagnosed with coronary artery disease or cardiac valve disease, and candidates for cardiac surgery with cardiopulmonary bypass

Prophylactic corticosteroids showed no clear difference in all‐cause mortality (during the index hospital admission, or within… compared with placebo or no corticosteroids (low certainty).

1 finding from 1 review

Prophylactic platelet transfusion at threshold of 10,000 vs higher transfusion threshold (20,000 or 30,000)

Mortality: secondary to bleeding · People with a haematological disorder

Prophylactic platelet transfusion at threshold of 10,000 showed no clear difference in mortality: secondary to bleeding compared with higher transfusion threshold (20,000 or 30,000) (low certainty).

1 finding from 1 review