Figure 5From: A predictive model for the early identification of patients at risk for a prolonged intensive care unit length of stay Calibration curve comparing mean observed and mean predicted intensive care unit (ICU) length of stay remaining on ICU day 5. The 11,903 patients in the 2006 to 2007 external validation set are divided into 20 equal-sized groups. The dotted line indicates perfect predictive ability (i.e. the observed means match the predicted means perfectly).Back to article page