Fig. 3

Flow chart of the study. *1 tracheostomy and 2 auto-extubations; **1 tracheostomy, 2 transfers, 1extubation < 24 h without any IMT sessions, and 1 pneumothorax unrelated to IMT; ***1 tracheostomy, 1 auto-extubation, 1 refusing MIP measurement, 1 severe bradycardia and 1 moderate isolated bradycardia; SBT spontaneous breathing trial, MI mixed intensity, HI high intensity, LI low intensity, TSC trial steering committee, IMT inspiratory muscle training, MIP maximal inspiratory pressure