Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

45 questions · 47 findings · 30 reviews

No studies found 6 · 12.8%GRADE not reported 2 · 4.3%Very low 12 · 25.5%Low 16 · 34%Moderate 6 · 12.8%High 5 · 10.6%

Higher vs lower FiO2 or targets of arterial oxygenation

All‐cause mortality: range 1 mo to 1 y · adults admitted to the ICU

It is very uncertain whether higher changes all‐cause mortality: range 1 mo to 1 y compared with lower FiO2 or targets of arterial oxygenation (very low certainty).

1 finding from 1 review

Anticoagulant drugs: VKA high dose vs vitamin K antagonist (VKA)

Total mortalitya · people with antiphospholipid syndrome and a history of stroke or thromboembolic events

High‐dose VKA showed no clear difference in all‐cause mortalitya compared with standard‐dose VKA (low certainty).

1 finding from 1 review

Higher vs lower omega‐6: additional key outcomes

All‐cause mortality Study duration range 12‐96 months Omega‐6 dose range 1.5%‐24.5% E · adults with or without existing CVD

Higher showed no clear difference in all‐cause mortality Study duration range 12‐96 months Omega‐6 dose… compared with lower omega‐6: primary outcomes (low certainty).

1 finding from 1 review

High‐dose vs standard‐dose strategies

Mortality before hospital discharge · preterm infants with or at risk for apnea of prematurity

High‐dose showed no clear difference in all‐cause mortality prior to hospital discharge compared with standard‐dose strategies (low certainty).

3 findings 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 ‐ 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

Intervention not reported

All‐cause mortality · people suffering from high altitude illness

The review found no eligible studies for this question.

1 finding from 1 review

Intervention not reported

All‐cause mortality · people suffering from high altitude illness

The review found no eligible studies for this question.

1 finding from 1 review