The impact of delayed tracheostomy on critically ill patients receiving mechanical ventilation: a retrospective cohort study in a chinese tertiary hospital.

"Declaration of generative AI in scientific writing NA. Declarations Ethics approval and consent to participateThis retrospective observational study was conducted at the Second Affiliated Hospital, Zhejiang University School of Medicine. Patients who were admitted to all of the ICUs from January 2011 to December 2020 and treated with MV were eligible. The trial was approved by the hospital’s ethics committee of the Second Affiliated Hospital, Zhejiang University School of Medicine (2021 Ethical Review No. 0210) and the Informed Consent in the retrospective study was waived by the the hospital’s ethics committee of the Second Affiliated Hospital, Zhejiang University School of Medicine. This trial wasregistered in the Chinese Clinical Trial Registry (ChiCTR2100043905). Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This work was supported by the National Key Research and Development Program of China (2021YFC2501800), the National Natural Science Foundation of China (82172163, 82372185), the Fundamental Research Funds for the Central Universities of China (226–2022-00105), the Qingyuan Science and Technology Plan Project (2022–28-47)."

"Trial registration ChiCTR2100043905. Registered 05 March 2021.http://www.chictr.org.cn/listbycreater.aspx"