Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,640 questions · 2,709 findings · 446 reviews

No studies found 593 · 21.9%GRADE not reported 241 · 8.9%Very low 538 · 19.9%Low 706 · 26.1%Moderate 516 · 19%High 115 · 4.2%

Long‐term red cell transfusion vs usual care

Proportion of participants developing new or progressive SCI lesions · prevention of SCI in people with SCD and normal TCD velocities

Long‐term RBC transfusion showed no clear difference in proportion of participants developing new or progressive SCI lesions compared with standard care (low certainty).

1 finding from 1 review

Long‐term red cell transfusion vs usual care

SCD‐related SAEs ‐ pain crisis · prevention of SCI in people with SCD and abnormal TCD velocities

It is very uncertain whether long‐term RBC transfusion changes SCD‐related SAEs ‐ pain crisis compared with standard care (very low certainty).

1 finding from 1 review