Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

959 questions · 987 findings · 78 reviews · Haematology

No studies found 256 · 25.9%GRADE not reported 64 · 6.5%Very low 207 · 21%Low 247 · 25%Moderate 163 · 16.5%High 50 · 5.1%

Aspirin vs vitamin K antagonist (VKA)

Major bleeding · ambulatory patients with multiple myeloma receiving immunomodulatory agents

It is very uncertain whether aspirin (ASA) changes major bleeding compared with vitamin K antagonist (VKA) (very low certainty).

2 findings 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

Resolution of symptoms · 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 initial symptoms resolved (asymptomatic) at day 14 compared with placebo or standard of care alone (low certainty).

1 finding from 1 review

Azithromycin vs placebo or usual care

Clinical worsening: need for invasive mechanical ventilation, or death at up to 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 worsening of clinical status: participants with clinical… compared with placebo or standard of care alone (moderate certainty).

1 finding from 1 review

Azithromycin vs placebo or usual care

Clinical improvement: discharged alive ( · 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 improvement of clinical status: participants discharged alive at day… compared with placebo or standard of care alone (moderate certainty).

1 finding from 1 review

Azithromycin vs placebo or usual care

Serious adverse events during the study period · 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 serious adverse events during the study period compared with placebo or standard of care alone (moderate certainty).

1 finding from 1 review

Azithromycin vs placebo or usual care

Adverse events during treatment period · 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 any adverse events during the study period compared with placebo or standard of care alone (low certainty).

1 finding from 1 review

Azithromycin vs placebo or usual care

Arrhythmias · 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 cardiac arrhythmias during the study period compared with placebo or standard of care alone (moderate 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

Azithromycin vs placebo or usual care

Admission to hospital or death within 28 days · 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 admission to hospital or death within 28 days compared with placebo or standard of care alone (low certainty).

1 finding from 1 review