Value-Based Price (VBP) is the fifth tab on the Two-Way Sensitivity Analyses (2WSA) Results page. It is the only optional results tab, and it displays how the maximum price that can be charged for a strategy (while remaining cost-effective) varies with defined parameter pairs and their associated values that you include in 2WSAs.
To include VBP results in your model, toggle on ‘Include VBP in TWSA Results’ on any 2WSA Results page, and click the ‘Configure VBP Analysis’ button. Then you can specify the health and an economic outcome, the intervention of interest, the price parameter for your intervention, the maximum value for the x-axis and the number of steps to be displayed. Once you have configured the VBP inputs, click ‘Run TWSA’.
VBP can be visualized either as heat maps or tables; you can toggle between these two modes using the controls by the left-hand corner of the display. The 'Configuration Sidebar' has the customary controls that are found on all Results pages. You also can use the ‘Configuration Sidebar’ to rerun a model with different input values, using the ‘User Override Value’ functionality that you will find there, similar to other Results pages.
There are a couple of additional controls that you might find helpful when setting up and displaying results of 2WSAs. The ‘Include Base Case’ toggle allows you to add or exclude results for base case values of the parameter pair if your 2WSA inputs did not include these. (Note: If base case values were specified on the 2WSA Inputs page—for example, if you used the radius method to define the values across which a parameter would be varied—this toggle will not remove them from the displays). Another control that you may find useful is the ‘Use Common Scale’ toggle, which allows you to either use the full color spectrum for each 2WSA, or alternatively, apply the same color scale across all parameter pairs, thereby revealing those that produce the greatest variability for a particular result of interest across a number of 2WSAs.
