Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

48 questions · 48 findings · 16 reviews · Haematology

No studies found 12 · 25%GRADE not reported 1 · 2.1%Very low 12 · 25%Low 13 · 27.1%Moderate 7 · 14.6%High 3 · 6.3%

Intervention not reported

28‐day all‐cause mortality · hospitalised adults with COVID‐19 (moderate to severe disease)

The intervention probably leads to lower 28‐day all‐cause mortality (moderate certainty).

1 finding from 1 review

Intervention not reported

All‐cause mortality at day 45 · non‐hospitalised adults with mild COVID‐19

The intervention showed no clear difference in all‐cause mortality at day 45 (low certainty).

1 finding from 1 review

Intervention not reported

All‐cause mortality at day 28 · people with moderate to severe disease (WHO scale 4–9); all trials contributing results to the summary of findings table investigated…

It is very uncertain whether the intervention changes all‐cause mortality at day 28 (very low certainty).

1 finding from 1 review

Intervention not reported

All‐cause mortality at day 28 · all trials contributing results to the summary of findings table included people with mild disease (WHO scale 1 to 3)§

The intervention showed no clear difference in all‐cause mortality at day 28 (moderate certainty).

1 finding from 1 review

Azithromycin vs placebo or usual care

All‐cause mortality at day 28 · people with moderate to severe disease (WHO scale 4–9); all studies contributing results to the summary of findings table included people…

Azithromycin showed no clear difference in all‐cause mortality at day 28 compared with placebo or standard of care alone (high certainty).

1 finding from 1 review

Azithromycin vs placebo or usual care

All‐cause mortality at day 28 · all trials contributing results to the summary of findings table included people with mild disease (WHO scale 1 to 3)§

Azithromycin showed no clear difference in all‐cause mortality at day 28 compared with placebo or standard of care alone (low certainty).

1 finding from 1 review

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

All‐cause mortality (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 all‐cause mortality (by day 28) compared with saline placebo (low certainty).

1 finding from 1 review

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

All‐cause mortality up to 30 days · hospitalised and unvaccinated individuals with a confirmed or suspected diagnosis of symptomatic COVID‐19

Summary of findings table ‐ Corticosteroids plus standard care probably leads to lower all‐cause mortality up to 30 days compared with standard care (plus/minus placebo) (moderate certainty).

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)

All‐cause mortality up to 30 days · hospitalised individuals with unknown vaccination status and a confirmed diagnosis of symptomatic COVID‐19

Summary of findings table ‐ High‐dose dexamethasone (12 mg or higher) showed no clear difference in all‐cause mortality up to 30 days compared with low‐dose dexamethasone (6 mg to 8 mg) (low certainty).

1 finding from 1 review

Summary of findings table ‐ Methylprednisolone vs dexamethasone

All‐cause mortality up to 30 days · hospitalised and unvaccinated individuals with a confirmed or suspected diagnosis of symptomatic COVID‐19

It is very uncertain whether summary of findings table ‐ Methylprednisolone changes all‐cause mortality up to 30 days compared with dexamethasone (very low certainty).

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)

All‐cause mortality up to 120 days · hospitalised individuals with unknown vaccination status and a confirmed diagnosis of symptomatic COVID‐19

It is very uncertain whether summary of findings table ‐ High‐dose dexamethasone (12 mg or higher) changes all‐cause mortality up to 120 days compared with low‐dose dexamethasone (6 mg to 8 mg) (very low certainty).

1 finding from 1 review

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

All‐cause mortality up to 120 days · hospitalised and unvaccinated individuals with a confirmed or suspected diagnosis of symptomatic COVID‐19

It is very uncertain whether summary of findings table ‐ Corticosteroids plus standard care changes all‐cause mortality up to 120 days compared with standard care (plus/minus placebo) (very low certainty).

1 finding from 1 review

Summary of findings table ‐ Convalescent plasma vs human immunoglobulin

All‐cause mortality at up to day 28 · individuals with moderate to severe disease

Summary of findings table ‐ Convalescent plasma showed no clear difference in all‐cause mortality at up to day 28 compared with human immunoglobulin (low certainty).

1 finding from 1 review