Methods
Patient notes were identified and reviewed in both physical and electronic health care records. Patients with less than six months clinical follow up were excluded. Patient demographics, surgical details including confirmation of the use of Bioactive glass, presence or absence of complications of open cavity surgery (dry ear (Merchant’s scale 0-1, Vertigo in Cold air, Water tight ear), audiological outcomes, and recurrence were recorded in a spreadsheet prior to statistical analysis using R. Studio software (R Core Team, 2018). [12]