The review found no eligible studies for this question.
It is very uncertain whether ventilation tubes changes presence/persistence of OME *Ventilation tubes versus laser… compared with myringotomy (very low certainty).
Ventilation tubes may leads to lower presence/persistence of OME Randomised by child Adjusted for… compared with no treatment (low certainty).
It is very uncertain whether early ventilation tubes changes presence/persistence of OME Randomised by child compared with watchful waiting (treatment later if required) (very low certainty).
It is very uncertain whether adenoidectomy and ventilation tubes changes presence/persistence of OME (at 2 years ‐ long‐term) № of… compared with no treatment/watchful waiting (very low certainty).
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).