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Table 8 Internal consistency for different COMQ-12 versions

From: Validation of a Spanish version of the health-related quality of life (HRQoL) measure for Chronic Otitis Media (COMQ-12)

Questionnaire language Participants (n) Patients with COM (n) Cronbach Alpha
Italian 48 48 0.80
English 50 50 0.89
Dutch 70 35 0.83
Portuguese 100 100 0.85
Kannada (India) 100 80 0.88
Turkish 100 50 0.81
Serbian 120 60 0.82
Russian 168 108 0.86
Korean 212 106 0.94
Spanish 231 200 0.86