Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

510 questions · 513 findings · 62 reviews · Headline outcomes only

No studies found 96 · 18.7%GRADE not reported 13 · 2.5%Very low 181 · 35.3%Low 121 · 23.6%Moderate 69 · 13.5%High 33 · 6.4%

Nitroglycerin vs no treatment

Adverse effects: headache · patients (15 years of age and older) undergoing non‐cardiac surgery under any type of anaesthesia

It is very uncertain whether nitroglycerin changes side effect (headache) compared with no treatment (very low certainty).

1 finding from 1 review

Nitroglycerin vs placebo

All‐cause mortality in 30 days post operation · patients (15 years of age and older) undergoing non‐cardiac surgery under any type of anaesthesia

It is very uncertain whether nitroglycerin changes all‐cause mortality in 30 days post operation compared with placebo (very low certainty).

1 finding from 1 review

Nitroglycerin vs placebo

Acute myocardial infarction · patients (15 years of age and older) undergoing non‐cardiac surgery under any type of anaesthesia

It is very uncertain whether nitroglycerin changes acute myocardial infarction compared with placebo (very low certainty).

1 finding from 1 review

Intervention not reported

Primary outcome: improvement in symptoms (respiratory distress/dyspnoea) · 23 patients aged two years or older with recurrent respiratory papillomatosis

The review found no eligible studies for this question.

1 finding from 1 review

Intervention not reported

Primary outcome: improvement in symptoms (voice quality) · 23 patients aged two years or older with recurrent respiratory papillomatosis

The review found no eligible studies for this question.

1 finding from 1 review