The increase in the absolute number of mastoidectomy sparing surgical admissions from 686 admissions in 2007–2008 to 895 admissions in 2017–2018 approached but did not reach statistical significance (rate ratio of 1.10 ([95% CI: 1.00–1.22], P = .05). 5.5.
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Incidence and trends of middle ear cholesteatoma surgery and mastoidectomy in Australia-A national hospital morbidity database analysis.
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