Fig. 3From: Characteristics and outcomes of patients admitted to adult intensive care units in Hong Kong: a population retrospective cohort study from 2008 to 2018Calibration of APACHE IV on hospital mortality prediction. The reference bold line shows perfect calibration between APACHE IV predicted hospital mortality and hospital mortality. The blue points represent observed hospital mortality. Observed mortality was lower than predicted mortality across the spectrum of illness severity in Hong Kong publicly funded intensive care unitsBack to article page