ArticleLaryngoscope investigative otolaryngology2026
Validation and Clinical Adaptation of a Swedish Version of the Tonsil Outcome Inventory-14 Questionnaire.
Article in Laryngoscope investigative otolaryngology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Purpose: To translate, culturally adapt, and validate a Swedish version of the Tonsillectomy Outcome Inventory-14 (TOI-14) and to evaluate an extended version including three additional sleep-disordered breathing (SDB) items (TOI-17) among adult tonsil surgery patients. Methods: This prospective multicenter study was conducted across five Swedish ENT departments between 2022 and 2023. One-hundred-and-eight adults scheduled for tonsil surgery and 84 controls without tonsil disease completed the TOI-14, TOI-17, and EQ-5D VAS at baseline and 2 weeks later, and patients repeated the questionnaires 6 months after surgery. Psychometric evaluation included internal consistency, test-retest reliability, convergent and known-groups validity, responsiveness, confirmatory factor analysis (CFA) and exploratory factor analysis (EFA). Results: At baseline, patients reported markedly higher TOI-14 (39.5 ± 17.8) and TOI-17 (50.7 ± 19.8) scores than controls (3.9 ± 4.5 and 4.9 ± 5.0; Conclusion: The Swedish TOI-14 and TOI-17 are valid, reliable, and responsive patient-reported outcome measures for adults with tonsil disease. The extended TOI-17 version adds clinically relevant coverage of sleep-related symptoms, enhancing applicability for both clinical use and registry-based quality assessment. Level of Evidence: III-non-randomized controlled cohort.
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