Fig. 2

The comparison of ICU mortality (a) and ventilation-free days (b) among four phenotypes. Patients with phenotype 4 exhibited the highest mortality rate and fewest VFDs compared to patients with the other phenotypes, regardless of the use of the crude dataset, IPTW based on the logistic regression dataset, or IPTW based on the XGBoost dataset. VFDs: ventilation-free days; IPTW: inverse probability of treatment weighting; XGBoost: Extreme Gradient Boosting