The mean ages at the time of operation were 11.1+/-3.3 years for COMP patients and 9.7+/-3.0 years for COMC subjects. Surgical treatments for pediatric COMP and COMC patients included tympanoplasty only in 45 ears (38% of ears treated) and tympanoplasty with mastoidectomy in 74 ears (62%). Most of patients with COMC received tympanoplasty with mastoidectomy. No patient with COMP underwent canal wall-down mastoidectomy. Mean pre-operative air-bone gaps (ABGs) and post-operative ABGs were compared. Significant improvement in ABG was evident in the COMP group, but not in the COMC group. Surgical success rates at follow-up after 6 months and 12 months were 97% and 95%, respectively, in the COMP group. In the COMC patients, surgical success rates at follow-up after 6 months and 12 months were 98% and 93%. There were no significant relationships between surgical success rate and patient age, the status of the contralateral ear, or the extent of surgery.
The probability of receiving additional ventilating tube insertion because of recurrent otitis media with effusion significantly increased in younger patients at the time of first ventilating tube insertion. The concurrent adenoidectomy, duration of the ventilating tube, postoperative otorrhea within 1 month, and early extrusion of the ventilating tube also influenced the probability of additional ventilating tube insertion.
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