Gastrointestinal manifestations of critical ill heatstroke patients and their associations with outcomes: A multicentre, retrospective, observational study

Figure 1 Flow chart of the study. Patients were grouped according to whether gastrointestinal (GI) symptoms occurred on intensive care unit (ICU) admission, then whether GI symptoms occurred during ICU hospitalization and the onset of patients’ GI symptoms. ICU: Intensive care unit; GI: Gastrointestinal; w: With; o: Without.