Adaptation and initial validation of the Spanish version of the chronic otitis media questionnaire-12 (COMQ-12) and chronic otitis media benefit inventory (COMBI)

BACKGROUND AND OBJECTIVES

The chronic otitis media questionnaire-12 (COMQ-12) and chronic otitis media benefit inventory (COMBI) aim to assess the quality of life related to chronic otitis media or its surgical treatment. The objective of this study was to validate the Spanish adaptation of the COMQ-12 and COMBI.

PATIENTS AND METHODS

Multicentre prospective instrument validation study. guidelines for the cross-cultural adaptation process were followed. The psychometric properties of the Spanish versions ("COMQ-12-Spa" for "COMQ-12-Spanish" and "COMBI-Spa" for "COMBI-Spanish") were assessed in 25 consecutive adults undergoing tympanoplasty and in a separate cohort of 25 unaffected adults.

RESULTS

COMQ-12-Spa: test-retest reliability, r=0.98; internal consistency reliability, α=0.92. Item-subscale and item-total coefficients, ≥0.40. Between-group discrimination, p<0.0001. COMBI-Spa: internal consistency, α=0.96. A high-intensity relationship between the variables was shown, ≥0.40. Correlation between the COMBI-Spa and the Spanish Glasgow Benefit Inventory (GBI), r=0.89; p<0.01.

CONCLUSION

Psychometric testing of the Spanish versions of the COMQ-12-Spa and COMBI-Spa yielded satisfactory results, thus allowing pre- and postintervention assessment of the subjective severity of chronic otitis media in adult patients.