Abstract
Because existing patient-reported outcome measures (PROMs) specific for chronic otitis media (COM) are lacking certain relevant symptoms and dimensions of health-related quality of life (HRQoL), we aimed to develop and validate a new questionnaire for comprehensively measuring HRQoL in adult patients with COM. An expert panel and patients were involved in developing the first version of the Zurich chronic middle ear inventory, containing 33 items (ZCMEI-33). An electronic application was chosen not only to provide maximal data quality, but also to facilitate and accelerate data analysis. Item reduction was performed by testing the questionnaire in a first cohort (n = 85). Using sequential statistical analysis, the ZCMEI-33 was reduced to 21 items (ZCMEI-21). Subsequently, the ZCMEI-21 was validated in a second cohort (n = 76). Validation revealed a Cronbach’s α of 0.91, indicating excellent internal consistency. Moreover, the ZCMEI-21 was able to discriminate between patients with COM and healthy participants (p < 0.0001), thus possessing good discrimination validity. Assessing criterion validity, the ZCMEI-21 total score was compared to a question directly addressing HRQoL and the EQ-5D descriptive system score, a generic measure of HRQoL. Whereas the ZCMEI-21 total score and the EQ-5D descriptive system score were only moderately correlated (r = 0.60, p < 0.0001), the ZCMEI-21 total score and the question directly addressing HRQoL showed a strong correlation (r = 0.74, p < 0.0001). In conclusion, sufficient information on reliability and validity was obtained to propagate the application of the ZCMEI-21 to quantify HRQoL in patients with COM.
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Abbreviations
- BYOD:
-
Bring your own device
- CES:
-
Chronic ear survey
- COM:
-
Chronic otitis media
- COMOT-15:
-
Chronic otitis media outcome test
- COMQ-12:
-
Chronic otitis media questionnaire
- EORTC QLQ-C30:
-
European Organization for Research and Treatment of Cancer Quality of Life Questionnaire
- ePROM:
-
Electronic patient-reported outcome measure
- EQ-5D:
-
European quality of life-5 dimensions questionnaire
- HRQoL:
-
Health-related quality of life
- ITC:
-
Item total correlation
- max:
-
Highest value
- min:
-
Lowest value
- OMCC:
-
Chronic otitis media with cholesteatoma
- OMCS:
-
Otitis media chronica simplex
- PCA:
-
Principal component analysis
- PRO:
-
Patient-reported outcome
- PROM:
-
Patient-reported outcome measure
- Q:
-
Question (“item”)
- SD:
-
Standard deviation
- SNOT-20:
-
Sinonasal outcome test
- ZCMEI-21:
-
Zurich chronic middle ear inventory, final version containing 21 questions
- ZCMEI-33:
-
Zurich chronic middle ear inventory, first version containing 33 questions
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The authors would like to acknowledge René Holzreuter and Daniel Zürrer for their advice and support.
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David Bächinger declares that he has no conflict of interest. Christof Röösli declares that he has no conflict of interest. Beate Ditzen declares that she has no conflict of interest. Alexander M. Huber declares that he has no conflict of interest.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional, cantonal and national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Bächinger, D., Röösli, C., Ditzen, B. et al. Development and validation of the Zurich chronic middle ear inventory (ZCMEI-21): an electronic questionnaire for assessing quality of life in patients with chronic otitis media. Eur Arch Otorhinolaryngol 273, 3073–3081 (2016). https://doi.org/10.1007/s00405-016-3915-7
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DOI: https://doi.org/10.1007/s00405-016-3915-7