Table F-7Detailed strength of evidence grading table, AOM

Intervention, Outcome, Time to OutcomeNumber of Studies; SubjectsRisk of BiasConsistencyDirectnessPrecisionStrength of Evidence Grade
Magnitude of Effect
TT, episodes/person yr, 3 yrs1, 119MediumUnknown, single studyDirectImpreciseInsufficient: one study found no diff

Abbreviations: TT = tympanostomy tubes.

From: Appendix F, Detailed Strength of Evidence Tables

Cover of Otitis Media With Effusion: Comparative Effectiveness of Treatments
Otitis Media With Effusion: Comparative Effectiveness of Treatments [Internet].
Comparative Effectiveness Reviews, No. 101.
Berkman ND, Wallace IF, Steiner MJ, et al.

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