Findings

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Evidence found and GRADE certainty

4,534 questions · 5,247 findings · 456 reviews

No studies found 1,142 · 21.8%GRADE not reported 1,503 · 28.6%Very low 1,040 · 19.8%Low 869 · 16.6%Moderate 554 · 10.6%High 139 · 2.6%

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Intervention not reported

Fast‐acting NRT (nicotine other) · adults (aged ≥ 18 years) who smoked cigarettes Components: components of pharmacological and e‐cigarette (EC) interventions for smoking…

The intervention leads to higher fast‐acting NRT (nicotine other) (high certainty).

1 finding from 1 review

Intervention not reported

Non‐nicotine/placebo EC · adults (aged ≥ 18 years) who smoked cigarettes Components: components of pharmacological and e‐cigarette (EC) interventions for smoking…

The intervention showed no clear difference in non‐nicotine/placebo EC (low certainty).

1 finding from 1 review

Intervention not reported

Nortriptyline · adults (aged ≥ 18 years) who smoked cigarettes Components: components of pharmacological and e‐cigarette (EC) interventions for smoking…

The intervention probably leads to higher nortriptyline (moderate certainty).

1 finding from 1 review

Adenoidectomy (with or without myringotomy) vs watchful waiting

Hearing ‐ return to normal *Ventilation tubes versus laser myringotomy (6 to 12 months ‐ medium‐term) Adjusted for non‐independence of within‐individual measurements Assumed ICC of 0.5 № of participants: 132 (2 RCTs) · children aged 6 months to 12 years with otitis media with effusion (OME)

It is very uncertain whether adenoidectomy (with or without myringotomy) changes hearing: proportion with normal hearing ‐ up to 12 months № of… compared with no treatment/watchful waiting (very low certainty).

1 finding from 1 review

Adenoidectomy (with or without myringotomy) vs watchful waiting

Presence/persistence of OME · children aged 6 months to 12 years with otitis media with effusion (OME)

It is very uncertain whether adenoidectomy (with or without myringotomy) changes presence or persistence of OME ‐ over 12 months № of participants:… compared with no treatment/watchful waiting (very low certainty).

1 finding from 1 review

Adenoidectomy and bilateral ventilation tubes vs bilateral ventilation tubes only

Hearing ‐ return to normal *Ventilation tubes versus laser myringotomy (6 to 12 months ‐ medium‐term) Adjusted for non‐independence of within‐individual measurements Assumed ICC of 0.5 № of participants: 132 (2 RCTs) · children aged 6 months to 12 years with otitis media with effusion (OME)

It is very uncertain whether adenoidectomy and bilateral ventilation tubes changes hearing: return to normal hearing at 6 to 9 months № of… compared with bilateral ventilation tubes only (very low certainty).

1 finding from 1 review

Adenoidectomy and bilateral ventilation tubes vs bilateral ventilation tubes only

Presence/persistence of OME · children aged 6 months to 12 years with otitis media with effusion (OME)

It is very uncertain whether adenoidectomy and bilateral ventilation tubes changes presence/persistence of OME ‐ over 12 months № of participants: 254… compared with bilateral ventilation tubes only (very low certainty).

1 finding from 1 review

Adenoidectomy and unilateral ventilation tube vs unilateral ventilation tube only

Hearing ‐ return to normal *Ventilation tubes versus laser myringotomy (6 to 12 months ‐ medium‐term) Adjusted for non‐independence of within‐individual measurements Assumed ICC of 0.5 № of participants: 132 (2 RCTs) · children aged 6 months to 12 years with otitis media with effusion (OME)

It is very uncertain whether adenoidectomy and unilateral ventilation tube changes hearing: proportion of children with hearing returned to normal (12… compared with unilateral ventilation tube only (very low certainty).

1 finding from 1 review

Autoinflation vs no treatment

Proportion of children whose hearing is normal · children aged 6 months to 12 years with otitis media with effusion (OME)

It is very uncertain whether autoinflation changes proportion of children whose hearing is normal compared with no treatment (very low certainty).

1 finding from 1 review