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Table 3.2.1 continuedAuthorYearReferenceCountryStudydesignPatientpopulationInterventionControlRach et al1991[14]The NetherlandsGates et al1989[77]USARandomised n=43Balanced Recruited from a birth cohort ofallocation 1 439 children, 1 328 screened forSOM between 2 and 4 years.288 children had flat tympanogramsat two consecutiveoccasions separated by3 monthsRCT n=578Age: 4–8 yearsSOMSOM 3–6 months and VT:n=8SOM >6 months and VT:n=14SOM 3–6 months and noVT: n=7SOM >6 months and noVT: n=14no SOM: n=9Myringotomy: n=127VT: n=150Ad = Adenoidectomy; ADTE = Adenoidtonsillectomy; ENT = Ear-nose and throat;HL = Hearing level; PTA = Pure tone average; RCT = Randomised controlled trial;SOM = Secretory otitis media; VT = Ventilation tube112Rörbehandling vid inflammation i mellanörat

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