Figure 1.

Overview of data type and source in the predictive models. The data temporally unavailable at prediction time (TUP data) are available for training the predictive models but are not available at the time the model is applied (index date). The data available at prediction time (APT data) are depicted in blue and the TUP data in green. Adjudicated outcomes are obtained from the NSQIP registry and are available only for 9785 out of 106 282 surgeries. They are depicted in yellow. We aim to make predictions for all cases.