Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,511 questions · 2,668 findings · 290 reviews

No studies found 743 · 27.8%GRADE not reported 329 · 12.3%Very low 775 · 29%Low 484 · 18.1%Moderate 279 · 10.5%High 58 · 2.2%

Elective radical (comprehensive) neck dissection vs Elective selective neck dissection

Recurrence · Adults with oral cavity cancer

It is very uncertain whether elective radical (comprehensive) neck dissection changes recurrence compared with elective selective neck dissection (very low certainty).

1 finding from 1 review

Elective neck dissection (at time of primary tumour resection) vs Therapeutic (delayed) neck dissection

Mortality (overall survival) · Adults with oral cavity cancer (tongue or floor of mouth) and clinically negative neck nodes

Elective neck dissection (at time of primary tumour resection) probably leads to lower mortality (overall survival) compared with therapeutic (delayed) neck dissection (moderate certainty).

1 finding from 1 review

Sentinel node biopsy (neck dissection only if biopsy positive) vs Elective neck dissection

Disease-free survival · Adults with oral cavity or oropharyngeal cancer

Sentinel node biopsy (neck dissection only if biopsy positive) showed no clear difference in disease-free survival (new disease, progression, and mortality) compared with elective neck dissection (low certainty).

1 finding from 1 review

Superselective neck dissection vs Elective selective neck dissection

Locoregional recurrence · Adults with oral cavity cancer (tongue or floor of mouth) and clinically negative neck nodes
1 finding from 1 review

Elective neck dissection (at time of primary tumour resection) vs Therapeutic (delayed) neck dissection

Disease-free survival · Adults with oral cavity cancer (tongue or floor of mouth) and clinically negative neck nodes

Elective neck dissection (at time of primary tumour resection) probably leads to lower disease-free survival (new disease, progression, and mortality) compared with therapeutic (delayed) neck dissection (moderate certainty).

1 finding from 1 review

Surgery plus radiotherapy vs Radiotherapy alone

Adverse events associated with treatment · Adults with oral cavity or oropharyngeal cancer
1 finding from 1 review

Light-emitting diode (LED) photobiomodulation vs Conventional orthodontic appliance treatment

Side effects or other adverse events · Adolescents and adults with malocclusion undergoing fixed orthodontic appliance treatment

The review found no eligible studies for this question.

1 finding from 1 review

PET-CT following chemoradiotherapy (neck dissection only if no/incomplete response) vs Planned neck dissection before or after chemoradiotherapy

Adverse events associated with treatment · Adults with oral cavity or oropharyngeal cancer with nodal disease (stage N2 or N3)
1 finding from 1 review

Light-emitting diode (LED) photobiomodulation vs Conventional orthodontic appliance treatment

Duration of orthodontic treatment: alignment stage (mandibular arch) · Adolescents and adults with malocclusion undergoing fixed orthodontic appliance treatment

It is very uncertain whether light-emitting diode (LED) photobiomodulation changes duration of orthodontic treatment: alignment stage (mandibular arch) compared with conventional orthodontic appliance treatment (very low certainty).

1 finding from 1 review

PET-CT following chemoradiotherapy (neck dissection only if no/incomplete response) vs Planned neck dissection before or after chemoradiotherapy

Disease-free survival · Adults with oral cavity or oropharyngeal cancer with nodal disease (stage N2 or N3)
1 finding from 1 review

Elective radical (comprehensive) neck dissection vs Elective selective neck dissection

Disease-free survival · Adults with oral cavity cancer

It is very uncertain whether elective radical (comprehensive) neck dissection changes disease-free survival (new disease, progression, and mortality) compared with elective selective neck dissection (very low certainty).

1 finding from 1 review

Summary of findings table ‐ Pseudophakia vs aphakia

Visual axis opacification · children younger than two years of age with bilateral congenital cataracts

It is very uncertain whether summary of findings table ‐ Pseudophakia changes visual axis opacification compared with aphakia (very low certainty).

1 finding from 1 review

Summary of findings table ‐ Pseudophakia vs aphakia

Glaucoma at 5 years · children younger than two years of age with bilateral congenital cataracts

It is very uncertain whether summary of findings table ‐ Pseudophakia changes glaucoma at 5 years compared with aphakia (very low certainty).

1 finding from 1 review