Fig. 1From: The original and two new derivative versions of the COMPERA 2.0 risk assessment model: useful tools for guiding balloon pulmonary angioplastySankey diagrams showing changes in risk profiles when the original COMPERA 2.0 risk score was converted to its derivative versions. Each panel shows the flow of patients between risk strata (nodes) from the original version to its derivative versions. The width of each band is weighted to the proportion of patients who had a given trajectory. A The 3-stratum model. B The 4-stratum modelBack to article page