Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

171 questions · 174 findings · 31 reviews

No studies found 82 · 47.1%GRADE not reported 7 · 4%Very low 40 · 23%Low 32 · 18.4%Moderate 10 · 5.7%High 3 · 1.7%

Medical/surgical masks vs no masks

Viral respiratory illness ‐ laboratory‐confirmed influenza/SARS‐CoV‐2 · general population

Medical/surgical masks showed no clear difference in viral respiratory illness ‐ laboratory‐confirmed influenza/SARS‐CoV‐2 compared with no masks (moderate certainty).

1 finding from 1 review

Any orthodontic and/or surgical treatment for Angle Class III malocclusion vs no intervention or another intervention

Correction of prominent lower front teeth / effectiveness of treatment (planned primary outcome) · Adults (16 years of age or older) with an Angle Class III malocclusion (prominent lower front teeth); people with syndromes, clefts or…

The review found no eligible studies for this question.

1 finding from 1 review
  • No included study measured the planned primary outcome. Discussion: 'The primary outcome proposed for this review was to evaluate the effectiveness of treatments for prognathism, but none of the studies conclusively…
    Studies not reported
    No studies found

Open (surgical) reduction and fixation vs Closed (non-surgical) treatment

Outcome not reported · Adults (16 to 68 years) with mandibular fractures excluding condylar involvement

The review found no eligible studies for this question.

1 finding from 1 review
  • "There were no studies comparing different types of closed interventions with one another or comparing open and closed interventions." "We found no studies that compared surgical with non-surgical treatments."
    0 studies
    No studies found

Surgical reimplantation of ureters plus antibiotics vs antibiotics alone

New renal parenchymal defects (scars and thinning) on IVP: unit of analysis (children) at 4 to 5 years: surgical correction + antibiotics versus antibiotics alone · primary VUR

Surgical reimplantation of ureters plus antibiotics showed no clear difference in new renal parenchymal defects (scars and thinning) on IVP: unit of… compared with antibiotics alone (moderate certainty).

1 finding from 1 review

Surgical reimplantation of ureters plus antibiotics vs antibiotics alone

Correction of VUR: unit of analysis (children) after 3 years: surgical correction + antibiotics versus antibiotics alone · primary VUR

It is very uncertain whether surgical reimplantation of ureters plus antibiotics changes correction of VUR: unit of analysis (children) after 3 years:… compared with antibiotics alone (very low certainty).

1 finding from 1 review