Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,004 questions · 1,019 findings · 269 reviews

No studies found 333 · 32.7%GRADE not reported 106 · 10.4%Very low 313 · 30.7%Low 189 · 18.5%Moderate 66 · 6.5%High 12 · 1.2%

Pilocarpine vs no treatment/placebo

Adverse effects (other reported events) · Patients receiving radiotherapy on its own or in addition to chemotherapy to the head and neck region
1 finding from 1 review

Surgery vs Radiotherapy alone

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

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

Adverse events associated with treatment · 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 higher adverse events associated with treatment compared with therapeutic (delayed) neck dissection (moderate certainty).

1 finding from 1 review

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

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

Supraomohyoid neck dissection vs Modified radical neck dissection

Adverse events associated with treatment · Adults with oral cavity or oropharyngeal cancer
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

An extended ZDV/3TC/LPV/r regimen administered to mothers vs Short‐Course AZT (intrapartum AZT/3TC/sd‐NVP)

Maternal Grade 3/4 Severe Adverse Events · HIV‐infected mothers and their breastfeeding infants

It is very uncertain whether an extended ZDV/3TC/LPV/r regimen administered to mothers changes maternal Grade 3/4 Severe Adverse Events compared with short course ZDV (intrapartum ZDV/3TC/sdNVP) (very low certainty).

1 finding from 1 review

Non‐invasive brain stimulation and pharmacological intervention (combination) vs a pharmacological intervention and sham stimulation or usual care (single)

Adverse events: death ‐ at end of treatment (secondary outcome) · people with depression after stroke

It is very uncertain whether pharmacological intervention and non‐invasive brain stimulation… changes adverse events: death (secondary outcome) compared with a pharmacological intervention and sham stimulation or usual care… (very low certainty).

1 finding from 1 review

Active stimulation + other intervention vs other intervention alone

Adverse event: lead failure/ displacement · adults with chronic pain

It is very uncertain whether active stimulation + other intervention changes adverse events:lead failure/ displacement compared with other intervention alone (very low certainty).

2 findings from 1 review