Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

3,454 questions · 3,562 findings · 816 reviews · Headline outcomes only

No studies found 538 · 15.1%GRADE not reported 239 · 6.7%Very low 933 · 26.2%Low 1,041 · 29.2%Moderate 612 · 17.2%High 199 · 5.6%

Intervention not reported

Viral clearance at 14 days · unvaccinated, non‐hospitalized people with mild symptomatic COVID‐19 (WHO scale 2 to 3) at high risk for progression to severe disease

The review found no eligible studies for this question.

1 finding from 1 review

Intervention not reported

All‐cause mortality at day 28 · hospitalized people with mild to moderate symptomatic COVID‐19 (WHO scale 2 to 4) with severe comorbidities

It is very uncertain whether the intervention changes all‐cause mortality at day 28 (very low certainty).

1 finding from 1 review

Intervention not reported

Quality of life up to 28 days and longest · hospitalized people with mild to moderate symptomatic COVID‐19 (WHO scale 2 to 4) with severe comorbidities

The review found no eligible studies for this question.

1 finding from 1 review

Intervention not reported

Viral clearance at 7 days · hospitalized people with mild to moderate symptomatic COVID‐19 (WHO scale 2 to 4) with severe comorbidities

It is very uncertain whether the intervention changes viral clearance at 7 days (very low certainty).

1 finding from 1 review

Intervention not reported

Viral clearance at 14 days · hospitalized people with mild to moderate symptomatic COVID‐19 (WHO scale 2 to 4) with severe comorbidities

It is very uncertain whether the intervention changes viral clearance at 14 days (very low certainty).

1 finding from 1 review

Intervention not reported

All initial symptoms resolved at 28 days, and up to the longest · unvaccinated, non‐hospitalized people with mild symptomatic COVID‐19 (WHO scale 2 to 3) at high risk for progression to severe disease

The review found no eligible studies for this question.

1 finding from 1 review

Intervention not reported

Quality of life up to 28 days and longest · unvaccinated, non‐hospitalized people with mild symptomatic COVID‐19 (WHO scale 2 to 3) at high risk for progression to severe disease

The review found no eligible studies for this question.

1 finding from 1 review

Main comparison of patch angioplasty vs primary closure

Stroke · patients undergoing carotid endarterectomy, whether the initial indication for endarterectomy was symptomatic or asymptomatic carotid…

It is very uncertain whether main comparison of patch angioplasty changes any stroke (fatal or non‐fatal; contralateral, ipsilateral or… compared with primary closure (very low certainty).

1 finding from 1 review

Main comparison of patch angioplasty vs primary closure

Perioperative ipsilateral stroke (< 30 days) · patients undergoing carotid endarterectomy, whether the initial indication for endarterectomy was symptomatic or asymptomatic carotid…

It is very uncertain whether main comparison of patch angioplasty changes ipsilateral stroke (fatal or non‐fatal; haemorrhage or infarct)… compared with primary closure (very low certainty).

1 finding from 1 review

Main comparison of patch angioplasty vs primary closure

Occlusion of the operated artery within 30 days of operation · patients undergoing carotid endarterectomy, whether the initial indication for endarterectomy was symptomatic or asymptomatic carotid…

Main comparison of patch angioplasty may leads to lower occlusion of the operated artery within 30 days of operation compared with primary closure (low certainty).

1 finding from 1 review

Shunting vs no shunting

Stroke‐related death within 30 days of surgery (best‐case) · patients with symptomatic or asymptomatic carotid disease

Shunting may leads to lower stroke‐related death within 30 days of surgery (best‐case) compared with no shunting (low certainty).

1 finding from 1 review

Shunting vs no shunting

Stroke‐related death within 30 days of surgery (worst‐case) · patients with symptomatic or asymptomatic carotid disease

Shunting showed no clear difference in stroke‐related death within 30 days of surgery (worst‐case) compared with no shunting (low certainty).

1 finding from 1 review

Antihistamine‐analgesic‐decongestant vs placebo

Global evaluation · otherwise healthy adults and children with common cold symptoms

Antihistamine‐analgesic‐decongestant showed no clear difference in global evaluation: after 3 days of treatment (included children 2 to… compared with placebo (low certainty).

1 finding from 1 review

Antihistamine‐analgesic‐decongestant vs placebo

Global evaluation: after 5 days of treatment (included children 2 to 12 years old only) · otherwise healthy adults and children with common cold symptoms

Antihistamine‐analgesic‐decongestant showed no clear difference in global evaluation: after 5 days of treatment (included children 2 to… compared with placebo (low certainty).

1 finding from 1 review