Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,539 questions · 2,602 findings · 424 reviews · Headline outcomes only

No studies found 572 · 22%GRADE not reported 189 · 7.3%Very low 527 · 20.3%Low 685 · 26.3%Moderate 514 · 19.8%High 115 · 4.4%

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

Long‐term red cell transfusion vs no transfusion

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

It is very uncertain whether long‐term red cell transfusion changes adverse events associated with transfusion compared with no transfusion (very low certainty).

1 finding from 1 review

Long‐term red cell transfusion vs no transfusion

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

It is very uncertain whether long‐term red cell transfusion changes TIA compared with no transfusion (very low certainty).

1 finding from 1 review

Long‐term red cell transfusion vs no transfusion

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 not had previous long‐term red cell transfusions

Long‐term red cell transfusion may leads to lower serious adverse events as a result of sickle cell‐related… compared with no transfusion (low certainty).

1 finding from 1 review

Long‐term red cell transfusion vs no transfusion

Stroke · 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 clinical stroke compared with no transfusion (very low certainty).

1 finding from 1 review

Long‐term red cell transfusion vs no transfusion

All‐cause mortality · 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 all‐cause mortality compared with no transfusion (very low certainty).

1 finding from 1 review

Long protocol vs long protocol (extend GnRHa 12 days after HCG)

Live birth or ongoing pregnancy · women undergoing pituitary suppression in assisted reproduction

Long protocol (GnRHa until HCG) showed no clear difference in live birth and ongoing pregnancies per woman randomised compared with long protocol (extend GnRHa 12 days after HCG) (low certainty).

1 finding from 1 review

Long protocol vs long protocol (extend GnRHa 12 days after HCG)

Clinical pregnancy rate · women undergoing pituitary suppression in assisted reproduction

Long protocol (GnRHa until HCG) showed no clear difference in clinical pregnancies per woman randomised compared with long protocol (extend GnRHa 12 days after HCG) (low certainty).

1 finding from 1 review

Long protocol continued GnRH agonist vs long protocol stop GnRH agonist

Clinical pregnancies Number of clinical pregnancies per woman randomised · women undergoing pituitary suppression in assisted reproduction

Long protocol continued GnRH agonist showed no clear difference in clinical pregnancies Number of clinical pregnancies per woman… compared with long protocol stop GnRH agonist (low certainty).

1 finding from 1 review

Long protocol continued GnRH agonist vs long protocol stop GnRH agonist

Ongoing pregnancy / live birth rate per woman · women undergoing pituitary suppression in assisted reproduction

Long protocol continued GnRH agonist showed no clear difference in live birth and ongoing pregnancies Number of live births or ongoing… compared with long protocol stop GnRH agonist (low certainty).

1 finding from 1 review

Naloxone + oxycodone prolonged release tablets vs oxycodone

Laxation response: risk of spontaneous rescue‐free bowel movements in the short terma · people with cancer irrespective of whether they were receiving palliative care opioid‐induced bowel dysfunction

The review found no eligible studies for this question.

1 finding from 1 review

Naloxone + oxycodone prolonged release tablets vs oxycodone

Laxation response: risk of spontaneous rescue‐free bowel movements in the medium termb · people with cancer irrespective of whether they were receiving palliative care opioid‐induced bowel dysfunction

The review found no eligible studies for this question.

1 finding from 1 review