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What do systematic reviews say?

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Evidence found and GRADE certainty

4,760 questions · 8,065 findings · 1,036 reviews

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No studies found 1,686 · 20.9%GRADE not reported 675 · 8.4%Very low 1,953 · 24.2%Low 2,048 · 25.4%Moderate 1,296 · 16.1%High 407 · 5%

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Low‐dose adjuvant radiotherapy vs standard‐dose adjuvant radiotherapy

Voice (Voice Handicap Index) · patients with HPV‐positive oropharyngeal carcinoma who have received minimally invasive transoral surgery

The review found no eligible studies for this question.

1 finding from 1 review

Summary of Findings Table ‐ Low vs moderate‐high nasal continuous positive airway pressure levels

Death or bronchopulmonary dysplasia at 36 weeks PMA · health problem or population

It is very uncertain whether summary of Findings Table ‐ Low changes death or BPD at 36 weeks PMA compared with moderate‐high nasal continuous positive airway pressure levels (very low certainty).

1 finding from 1 review

Summary of Findings Table ‐ Low vs moderate‐high nasal continuous positive airway pressure levels

BPD at 28 days · health problem or population

The review found no eligible studies for this question.

2 findings from 1 review

Summary of Findings Table ‐ Low vs moderate‐high nasal continuous positive airway pressure levels

BPD (36 weeks' PMA) · health problem or population

It is very uncertain whether summary of Findings Table ‐ Low changes BPD, defined as supplemental oxygen or positive pressure support use… compared with moderate‐high nasal continuous positive airway pressure levels (very low certainty).

1 finding from 1 review

Summary of Findings Table ‐ Low vs moderate‐high nasal continuous positive airway pressure levels

Treatment failure or need for mechanical ventilation · health problem or population

It is very uncertain whether summary of Findings Table ‐ Low changes treatment failure or need for mechanical ventilation compared with moderate‐high nasal continuous positive airway pressure levels (very low certainty).

2 findings from 1 review

Summary of Findings Table ‐ Low vs moderate‐high nasal continuous positive airway pressure levels

Mortality before hospital discharge · health problem or population

It is very uncertain whether summary of Findings Table ‐ Low changes mortality, by hospital discharge compared with moderate‐high nasal continuous positive airway pressure levels (very low certainty).

2 findings from 1 review

Summary of Findings Table ‐ Low vs moderate‐high nasal continuous positive airway pressure levels

Moderate‐severe neurodevelopmental impairment at 18 to 26 months ‐ not measured · health problem or population

The review found no eligible studies for this question.

2 findings from 1 review

Summary of Findings Table ‐ Low vs moderate‐high nasal continuous positive airway pressure levels

Bronchopulmonary dysplasia/chronic lung disease · health problem or population

It is very uncertain whether summary of Findings Table ‐ Low changes BPD, defined as supplemental oxygen or positive pressure support use… compared with moderate‐high nasal continuous positive airway pressure levels (very low certainty).

1 finding from 1 review

Summary of Findings Table ‐ Low vs moderate‐high nasal continuous positive airway pressure levels

Combined outcome of mortality or BPD at 36 weeks' PMA · health problem or population

It is very uncertain whether summary of Findings Table ‐ Low changes death or BPD at 36 weeks' PMA compared with moderate‐high nasal continuous positive airway pressure levels (very low certainty).

1 finding from 1 review