Abstract
OBJECTIVE: To analyse the effects of tracheostomy timing on COVID-19 outcomes by comparing mortality rates at different time points (7, 10 and 14 days). DESIGN: Systematic review and meta-analysis. DATA SOURCES: PubMed, Embase, Cochrane Library, Web of Science and Scopus were searched from 31 August 2023 to 6 September 2023. PRIMARY AND SECONDARY OUTCOMES MEASURES: The primary outcome was short-term mortality, defined as intensive care unit (ICU) mortality, hospital mortality and 28-day or 30-day mortality. The secondary outcomes included mechanical ventilation duration, ICU and hospital days. RESULTS: Among 3465 patients from 12 studies, the 10-day subgroup analysis revealed higher mortality for earlier tracheostomy than for later tracheostomy (49.7% vs 32.6%, OR 1.91, 95% CI 1.37-2.65). No significant differences were observed at 7- and 14-day marks. Earlier tracheostomy was associated with shorter mechanical ventilation (mean difference=-7.35 days, 95% CI -11.63 to -0.38) and ICU stays (mean difference=-11.24 days, 95% CI -18.50 to -3.97) compared with later tracheostomy. Regarding hospital stay, the later tracheostomy group exhibited a trend towards longer-term inpatients, with no significant difference. CONCLUSIONS: No significant difference in short-term mortality was observed between patients undergoing tracheostomy at 7 and 14 days; however, at 10 days, later tracheostomy resulted in a lower mortality rate. Accordingly, subtle timing differences may impact short-term results in COVID-19 patients. Considering that the later tracheostomy group had longer mechanical ventilation and ICU stays, additional research is required to determine an optimal timing that reduces mortality cost-effectively.