Predicting changes in systolic blood pressure using longitudinal patient records

The graph on the left represents the actual change in a patient's SBP on the horizontal axis, and the change in SBP predicted by the model on the vertical axis. The diagonal line goes through all points in the graph where “Actual SBP Change” is equal to “Predicted SBP Change”. As such, the closer a plotted point is to the diagonal line, the more accurate the prediction.61