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| Methods | Randomised controlled trial | |
| Participants | I: ‐ mastoidectomy (different types) II: ‐ tympanoplasty (different types) | |
| Interventions | (1) ceftriaxone (2) no antibiotic | |
| Outcomes | ‐ Discharge after 1 week, 1 month and 2 months ‐ Perforation of the tympanic membrane after 1 week, 1 month and 2 months ‐ Stable situation after 1 week, 1 month and 2 months | |
| Notes | — | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Allocation concealment? | Unclear risk | B ‐ Unclear |
