Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

20 questions · 20 findings · 6 reviews · Haematology

No studies found 4 · 20%GRADE not reported 0 · 0%Very low 1 · 5%Low 7 · 35%Moderate 4 · 20%High 4 · 20%

Fewer vs more courses of chemotherapy (with or without radiotherapy

Death · Patients with untreated Hodgkin lymphoma (early stages)

Fewer showed no clear difference in death compared with more courses of chemotherapy (with or without radiotherapy (high certainty).

1 finding from 1 review

Dose‐intensified chemotherapy vs ABVD‐like chemotherapy (with or without radiotherapy

Death · Patients with untreated Hodgkin lymphoma (advanced stages)

Dose‐intensified chemotherapy showed no clear difference in death compared with ABVD‐like chemotherapy (with or without radiotherapy (moderate certainty).

1 finding from 1 review

Chemotherapy alone vs same chemotherapy plus radiotherapy

Death · Patients with untreated Hodgkin lymphoma (early and advanced stages)

Chemotherapy alone showed no clear difference in death compared with same chemotherapy plus radiotherapy (moderate certainty).

1 finding from 1 review

Chemotherapy plus involved‐field radiation vs same chemotherapy plus extended‐field radiation

Death · Patients with untreated Hodgkin lymphoma (early stages)

Chemotherapy plus involved‐field radiation showed no clear difference in death compared with same chemotherapy plus extended‐field radiation (high certainty).

1 finding from 1 review

Chemotherapy plus lower‐dose radiation vs same chemotherapy plus higher‐dose radiation

Death · Patients with untreated Hodgkin lymphoma (early stages)

Chemotherapy plus lower‐dose radiation showed no clear difference in death compared with same chemotherapy plus higher‐dose radiation (high certainty).

1 finding from 1 review

Casirivimab/imdevimab vs usual care

Clinical progression: IMV or death (≥ 7 WHO scale) · hospitalised individuals with COVID‐19 (moderate to severe disease)

Casirivimab/imdevimab showed no clear difference in clinical progression: need for IMV or death (WHO ≥ 7) compared with usual care alone (moderate certainty).

1 finding from 1 review

Summary of findings table ‐ Corticosteroids plus standard care vs placebo or usual care

Clinical worsening: new need for invasive mechanical ventilation or death · hospitalised and unvaccinated individuals with a confirmed or suspected diagnosis of symptomatic COVID‐19

Summary of findings table ‐ Corticosteroids plus standard care showed no clear difference in clinical worsening: new need for invasive mechanical ventilation or… compared with standard care (plus/minus placebo) (low certainty).

1 finding from 1 review

Summary of findings table ‐ Convalescent plasma vs placebo or usual care

Clinical worsening: need for invasive mechanical ventilation, or death at up to day 28 · individuals with moderate to severe disease

Summary of findings table ‐ Convalescent plasma showed no clear difference in clinical worsening: need for invasive mechanical ventilation, or… compared with placebo or standard care alone (high certainty).

1 finding from 1 review

Summary of findings table ‐ Convalescent plasma vs standard plasma

Clinical worsening: need for invasive mechanical ventilation, or death at up to day 28 · individuals with moderate to severe disease

It is very uncertain whether summary of findings table ‐ Convalescent plasma changes clinical worsening: need for invasive mechanical ventilation, or… compared with standard plasma (very low certainty).

1 finding from 1 review

Summary of findings table ‐ Methylprednisolone vs dexamethasone

Clinical worsening: need for invasive mechanical ventilation, or death at up to day 28 · hospitalised and unvaccinated individuals with a confirmed or suspected diagnosis of symptomatic COVID‐19

The review found no eligible studies for this question.

1 finding from 1 review

Summary of findings table ‐ High‐dose dexamethasone (12 mg or higher) vs low‐dose dexamethasone (6 mg to 8 mg)

Clinical worsening: need for invasive mechanical ventilation, or death at up to day 28 · hospitalised individuals with unknown vaccination status and a confirmed diagnosis of symptomatic COVID‐19

The review found no eligible studies for this question.

1 finding from 1 review

RBD‐specific polyclonal F(ab') 2 fragments of equine antibodies (EpAbs) vs saline placebo

Worsening of clinical status (expressed as new need for IMV, admission to ICU, or death by day 28) · individuals with moderate or severe COVID‐19

RBD‐specific polyclonal F(ab') 2 fragments of equine antibodies… showed no clear difference in worsening of clinical status (expressed as new need for IMV,… compared with saline placebo (low certainty).

1 finding from 1 review

Hyperimmune immunoglobulin from human plasma vs saline placebo

Serious adverse events up to day 28 (data available only as a composite of serious adverse events or death up to day 28) · individuals with moderate or severe COVID‐19

Hyperimmune immunoglobulin from human plasma showed no clear difference in serious adverse events up to day 28 (data available only as a… compared with saline placebo (low certainty).

1 finding from 1 review