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Table 3.2.1 continuedAuthorYearReferenceCountryStudydesignPatientpopulationInterventionControlMaw et al1999[78]United KingdomRCT n=182Age: 1–5 yearsBilateral SOM >3 monthsHearing loss: >25 dBMean hearing level (dB) at4 kHz in better (worse) ear:Early VT: 32.9 (42.5) dBLate VT: 34.9 (42.8) dBEarly bilateral VT (within6 weeks): n=92Late bilateral VT(9 months): n=90Ad was performed whennasal obstructionMaw et al1986[80]United KingdomRCT n=150Age: 2–9 years, mean 5 yearsBilateral SOM >3 months(otoscopy), HL>25 dB at ≥1frequences (mean 36.5 dB),tympanometry notshowing type AMean hearing level (dB):VT: 31.1 dBNo VT: 32.4 dBAd: n=47Ad + tonsillectomy: n=47No Ad: n=56All subjects had unilateralVT randomised betweenears106Rörbehandling vid inflammation i mellanörat

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