Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,532 questions · 2,642 findings · 483 reviews · Headline outcomes only

No studies found 534 · 20.2%GRADE not reported 82 · 3.1%Very low 641 · 24.3%Low 807 · 30.5%Moderate 472 · 17.9%High 106 · 4%

HFNC vs standard oxygen therapy

In‐hospital mortality (up to 90 days; included studies reported in‐hospital mortality, and mortality up to 28 days and up to ICU discharge) · adults in the ICU, requiring respiratory support

HFNC showed no clear difference in in‐hospital mortality (up to 90 days; included studies reported… compared with standard oxygen therapy (moderate certainty).

1 finding from 1 review

HFNC vs standard oxygen therapy

Adverse events Respiratory infection (pneumonia) Nasal mucosa or skin trauma · adults in the ICU, requiring respiratory support

HFNC showed no clear difference in adverse events Respiratory infection (pneumonia) Nasal mucosa or… compared with standard oxygen therapy (moderate certainty).

1 finding from 1 review

HFNC vs NIPPV or NIV

Treatment failure (escalation of respiratory therapy to NIV, NIPPV or invasive ventilation) Measured up to 28 days · adults in the ICU, requiring respiratory support

HFNC showed no clear difference in treatment failure (escalation of respiratory therapy to NIV, NIPPV… compared with NIPPV or NIV (low certainty).

1 finding from 1 review

HFNC vs NIPPV or NIV

In‐hospital mortality (up to 90 days; included studies reported in‐hospital mortality, and mortality up to 28 days and up to ICU discharge) · adults in the ICU, requiring respiratory support

HFNC showed no clear difference in in‐hospital mortality (up to 90 days; included studies reported… compared with NIPPV or NIV (low certainty).

1 finding from 1 review

Beta‐blockers vs placebo or no treatment

Heart failure hospitalisation (RR) · patients with chronic heart failure with preserved ejection fraction

It is very uncertain whether beta‐blockers changes heart failure hospitalisation (RR) compared with placebo or no treatment (very low certainty).

1 finding from 1 review

Mineralocorticoid receptor antagonists (MRAs) vs placebo or no treatment

Cardiovascular mortality · patients with chronic heart failure with preserved ejection fraction

Mineralocorticoid receptor antagonists (MRAs) showed no clear difference in cardiovascular mortality (RR) compared with placebo or no treatment (moderate certainty).

1 finding from 1 review

Mineralocorticoid receptor antagonists (MRAs) vs placebo or no treatment

Heart failure hospitalisation (RR) · patients with chronic heart failure with preserved ejection fraction

Mineralocorticoid receptor antagonists (MRAs) probably leads to lower heart failure hospitalisation (RR) compared with placebo or no treatment (moderate certainty).

1 finding from 1 review

Mineralocorticoid receptor antagonists (MRAs) vs placebo or no treatment

Hyperkalaemia · patients with chronic heart failure with preserved ejection fraction

Mineralocorticoid receptor antagonists (MRAs) leads to higher hyperkalaemia compared with placebo or no treatment (high certainty).

1 finding from 1 review