Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

31 questions · 31 findings · 4 reviews · Injuries · Headline outcomes only

No studies found 6 · 19.4%GRADE not reported 0 · 0%Very low 6 · 19.4%Low 8 · 25.8%Moderate 6 · 19.4%High 5 · 16.1%

Long‐stored ('older') PRBC (≥ 21 days of storage) vs short‐stored (fresh) PRBC (< 21 days of storage)

Transfusion‐related acute lung injury ‐ not measured · patients requiring blood transfusion (children with malaria and adults with a traumatic injury)

The review found no eligible studies for this question.

1 finding from 1 review

Long‐stored ('older') PRBC (≥ 21 days of storage) vs short‐stored (fresh) PRBC (< 21 days of storage)

Death from any cause · patients requiring blood transfusion (children with malaria and adults with a traumatic injury)

It is very uncertain whether long‐stored ('older') PRBC (≥ 21 days of storage) changes death from any cause compared with short‐stored (fresh) PRBC (< 21 days of storage) (very low certainty).

1 finding from 1 review

DDAVP vs placebo or usual care

Number of participants receiving a red cell transfusion (total) · participants undergoing surgery

DDAVP showed no clear difference in number of participants receiving a red cell transfusion (total) compared with placebo or standard care (moderate certainty).

1 finding from 1 review

DDAVP vs aprotinin

Number of participants receiving a red cell transfusion (total) · participants undergoing surgery

DDAVP may leads to higher number of participants receiving a red cell transfusion (total) compared with aprotinin (low certainty).

1 finding from 1 review

DDAVP vs placebo or usual care

Number of participants receiving a red cell transfusion (total) · participants with platelet dysfunction undergoing surgery

DDAVP showed no clear difference in number of participants receiving a red cell transfusion (total) compared with placebo or standard care: platelet dysfunction subgroup (low certainty).

1 finding from 1 review

Transfusion of RBCs of shorter vs longer storage duration

Mortality: in‐hospital mortality (within 7 days) · all conditions

It is very uncertain whether transfusion of RBCs of shorter changes mortality: in‐hospital mortality (within 7 days) compared with longer storage duration (very low certainty).

1 finding from 1 review

Transfusion of RBCs of shorter vs standard practice storage duration

Mortality: in‐hospital mortality (time points varied) · all conditions

Transfusion of RBCs of shorter showed no clear difference in mortality: in‐hospital mortality (time points varied) compared with standard practice storage duration (moderate certainty).

1 finding from 1 review

Transfusion of RBCs of shorter vs standard practice storage duration

Mortality: short‐term mortality (up to 30 days) ‐ neonates · all conditions

It is very uncertain whether transfusion of RBCs of shorter changes mortality: short‐term mortality (up to 30 days) ‐ neonates compared with standard practice storage duration (very low certainty).

1 finding from 1 review

Transfusion of RBCs of shorter vs standard practice storage duration

Mortality: short‐term mortality (up to 30 days) ‐ adults · all conditions

Transfusion of RBCs of shorter showed no clear difference in mortality: short‐term mortality (up to 30 days) ‐ adults compared with standard practice storage duration (moderate certainty).

1 finding from 1 review