Introduction
The main purposes of chronic otitis media (COM) surgery are to re-establish the protective barrier of the middle ear and improve hearing. However, current study results vary significantly since the comparability of surgical results can be affected by variances in surgical method, repair materials, lesion severity, and so on. Pure tone audiometry is routinely used to assess pre-and postoperative hearing. Most clinical research, on the other hand, have only assessed average pure tone threshold, rather than frequency-specific hearing results. Frequency-specific hearing studies are important since the same average pure tone threshold does not always lead to the same patterns of hearing perception 1. Therefore, we conducted a retrospective study in which we assessed frequency-specific hearing results based on possible influencing factors to give evidence for frequency-specific postoperative hearing rehabilitation.