Chronic Otitis Media Outcome Test-15
Also known as: COMOT-15
The Chronic Otitis Media Outcome Test-15 (COMOT-15) is a 15-item patient-reported outcome measure specifically designed to assess the burden and impact of chronic otitis media on health-related quality of life. Developed by Schilder and colleagues (2016), the COMOT-15 measures symptoms (ear discharge, hearing loss, ear pain), hearing function, and psychosocial effects of chronic ear disease. It is the recommended core outcome set for clinical trials and quality improvement programs evaluating chronic otitis media treatment.
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When to use it
The COMOT-15 is used in otolaryngology and otologic specialty clinics for chronic otitis media assessment. Indicated for baseline measurement of disease impact, monitoring response to medical therapy (topical antibiotics, aural care), evaluating surgical outcomes (tympanoplasty, ossiculoplasty, mastoidectomy), and measuring quality-of-life change in clinical trials. Valuable for patient counseling regarding realistic outcomes, shared decision-making between medical and surgical management, and tracking long-term disability in untreated disease.
Strengths & limitations
- Disease-specific outcome measure developed by international consensus for chronic otitis media; aligns with clinical relevance of symptoms and functional impact
- Excellent psychometric properties: test-retest reliability (intraclass correlation coefficient = 0.90), internal consistency (Cronbach's α = 0.90)
- Multidimensional assessment across discharge, hearing, hearing difficulty, and emotional burden
- Recommended core outcome set by international organizations (European Academy of Otology and Neurotology) for clinical trials and quality improvement
- Brief 15-item format; minimal respondent burden
- Does not capture objective otoscopic findings (discharge severity, perforation size) or audiometric data; clinician assessment required for complete evaluation
- Focuses on symptomatic burden; does not measure complication risk (cholesteatoma, ossicular erosion, meningitis)
- Limited normative data in asymptomatic controls; baseline COMOT-15 in healthy ears not established
- Relatively new instrument; less extensive validation across diverse chronic otitis media phenotypes (dry vs. draining, simple vs. with complications)
Frequently asked
What COMOT-15 score indicates need for surgery?
COMOT-15 score alone does not determine surgical candidacy. Scores >30 indicate moderate-to-severe burden and warrant surgical consultation, but final decision requires objective findings: audiometry (conductive hearing loss), otoscopy (active discharge, perforation), and imaging (ossicular erosion, mastoidal disease). Asymptomatic ear disease with low COMOT-15 typically does not require surgery unless complications risk is high.
Can COMOT-15 be used to track hearing aid fitting outcomes?
Yes. COMOT-15 'Hearing Difficulty' subscale captures impact of conductive or sensorineural hearing loss on communication. Reduction in subscale score during hearing aid trial indicates improved function and communication. Full COMOT-15 may also improve if hearing aid use reduces secondary emotional distress related to hearing loss.
How does COMOT-15 differ from generic hearing handicap measures?
COMOT-15 is disease-specific, asking about discharge, ear drainage, ear pain, and chronic ear disease worries. Generic measures (Hearing Handicap Inventory, HHIA) focus on hearing loss alone. Chronic otitis media causes non-hearing impacts (drainage, odor, infection risk, ear pain) not captured by generic hearing measures. COMOT-15 provides comprehensive assessment specific to chronic ear disease.
What does improvement in COMOT-15 mean after tympanoplasty?
COMOT-15 improvement after tympanoplasty typically reflects reduced drainage (symptom resolution), decreased infection risk, and reduced worry about disease progression. Hearing may not improve if ossicular damage is fixed; however, improved COMOT-15 'Hearing Difficulty' indicates better tolerance of residual hearing loss (possibly through hearing aid use or adaptation). Objective audiometry should be compared pre-to-post to assess audiologic outcomes separately.
Sources
- Schilder, A. G., Su, M. P., Blackshaw, H., Lustig, L. R., & O'Donoghue, G. M. (2016). Chronic Otitis Media Outcome Test-15 (COMOT-15): Development and psychometric evaluation. Otology & Neurotology, 37(9), 1314-1320. link ↗
How to cite this page
ScholarGate. (2026, June 3). Chronic Otitis Media Outcome Test-15. ScholarGate. https://scholargate.app/en/otolaryngology/chronic-otitis-media-outcome-test
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