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What do systematic reviews say?

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Evidence found and GRADE certainty

28 questions · 28 findings · 1 reviews · Cystic Fibrosis and Genetic Disorders

No studies found 6 · 21.4%GRADE not reported 3 · 10.7%Very low 13 · 46.4%Low 5 · 17.9%Moderate 1 · 3.6%High 0 · 0%

Long‐term red cell transfusion vs no transfusion

Stroke · individuals with sickle cell disease who are at risk of a primary stroke who have not had previous long‐term red cell transfusions

Long‐term red cell transfusion probably leads to lower clinical stroke compared with no transfusion (moderate certainty).

1 finding from 1 review

Long‐term red cell transfusion vs no transfusion

Measures of neurological impairment ‐ not reported · individuals with sickle cell disease who are at risk of a primary stroke who have had long‐term red cell transfusions to prevent a stroke

The review found no eligible studies for this question.

1 finding from 1 review

Long‐term red cell transfusion vs hydroxyurea and phlebotomy

Incidence of TIA · individuals with sickle cell disease who are at risk of a primary stroke who have had long‐term red cell transfusions to prevent a stroke

It is very uncertain whether long‐term red cell transfusion changes incidence of TIA compared with hydroxyurea and phlebotomy (very low certainty).

1 finding from 1 review

Long‐term red cell transfusion vs hydroxyurea and phlebotomy

Serious adverse events as a result of sickle cell‐related complications · individuals with sickle cell disease who are at risk of a primary stroke who have had long‐term red cell transfusions to prevent a stroke

It is very uncertain whether long‐term red cell transfusion changes serious adverse events as a result of sickle cell‐related… compared with hydroxyurea and phlebotomy (very low certainty).

1 finding from 1 review

Long‐term red cell transfusion vs hydroxyurea and phlebotomy

Measures of neurological impairment ‐ not reported · individuals with sickle cell disease who are at risk of a primary stroke who have had long‐term red cell transfusions to prevent a stroke

The review found no eligible studies for this question.

1 finding from 1 review

Long‐term red cell transfusion vs hydroxyurea and phlebotomy

Quality of life ‐ not reported · individuals with sickle cell disease who are at risk of a primary stroke who have had long‐term red cell transfusions to prevent a stroke

The review found no eligible studies for this question.

1 finding from 1 review

Long‐term red cell transfusion vs hydroxyurea and phlebotomy

Stroke · individuals with sickle cell disease who have had a stroke who have had long‐term red cell transfusions to prevent another stroke

It is very uncertain whether long‐term red cell transfusion changes clinical stroke compared with hydroxyurea and phlebotomy (very low certainty).

1 finding from 1 review

Long‐term red cell transfusion vs hydroxyurea and phlebotomy

All‐cause mortality · individuals with sickle cell disease who have had a stroke who have had long‐term red cell transfusions to prevent another stroke

It is very uncertain whether long‐term red cell transfusion changes all‐cause mortality compared with hydroxyurea and phlebotomy (very low certainty).

1 finding from 1 review

Long‐term red cell transfusion vs hydroxyurea and phlebotomy

Incidence of TIA · individuals with sickle cell disease who have had a stroke who have had long‐term red cell transfusions to prevent another stroke

It is very uncertain whether long‐term red cell transfusion changes incidence of TIA compared with hydroxyurea and phlebotomy (very low certainty).

1 finding from 1 review

Long‐term red cell transfusion vs hydroxyurea and phlebotomy

Serious adverse events as a result of sickle cell‐related complications · individuals with sickle cell disease who have had a stroke who have had long‐term red cell transfusions to prevent another stroke

It is very uncertain whether long‐term red cell transfusion changes serious adverse events as a result of sickle cell‐related… compared with hydroxyurea and phlebotomy (very low certainty).

1 finding from 1 review

Long‐term red cell transfusion vs hydroxyurea and phlebotomy

Measures of neurological impairment ‐ not reported · individuals with sickle cell disease who have had a stroke who have had long‐term red cell transfusions to prevent another stroke

The review found no eligible studies for this question.

1 finding from 1 review