Fig. 1From: The impact of delayed tracheostomy on critically ill patients receiving mechanical ventilation: a retrospective cohort study in a chinese tertiary hospitalFlow diagram of specific process of the trial, illustrating the number of patients in each step and each group. Grouping criteria I: ET (≤ 5d), IMT (5 < d ≤ 10), LT (> 10d). Grouping criteria I: ET (≤ 7d), IMT (7 < d ≤ 14), LT (> 14d). ET = early tracheostomy, IMT = intermediate tracheostomy, LT = late tracheostomyBack to article page