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Table 1 Baseline demographic and clinical characteristics of the COM participants

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

Characteristic n %
Sex, f/ma 105/95 52.5/47.5
Age (Years)b 41.83 (15.26) 40.81 (18.02–85.47)
Socioeconomic status
 Low-income level (Strata 1 and 2) 139 69.5
 Medium income level (Strata 3 and 4) 58 29
 High-income level (Strata 5 and 6) 3 1.5
Educational level
 Primary education (Complete) 33 16.5
 Secondary education 104 52
 Technical degree 34 17
 University education 18 9
 Postgraduate degree 11 5.5
Disease duration (Years)a 26.13 (17.06) 23 (1–63)
Bilateral otitis 86 43
Previous contralateral surgery 6 3
Otoscopic examination—right ear
 Active squamous epithelium (Cholesteatoma) 15 7.5
 Inactive squamous epithelium (Retraction, atelectasis, epidermolysis) 16 8
 Perforated eardrum with discharge (Wet perforation) 56 28
 Dry perforated eardrum 39 19.5
 Healed COM (Neo-tympanum, intact tympanic membrane, tympanosclerosis) 22 11
 Normal otoscopic examination 52 26
Otoscopic examination—left ear
 Active squamous epithelium (Cholesteatoma) 19 9.5
 Inactive squamous epithelium (Retraction, atelectasis, epidermolysis) 14 7
 Perforated eardrum with discharge (Wet perforation) 51 25.5
 Dry perforated eardrum 34 17
 Healed COM (Neo-tympanum, intact tympanic membrane, tympanosclerosis) 20 10
 Normal otoscopic examination 62 31
  1. af/m: female/male
  2. bValues are expressed in Mean (SD) and Median (Range)