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On 20 February 2020, the Institute for Clinical and Economic Review (ICER) released its draft evidence report to establish the value of innovative therapies in the treatment of cystic fibrosis. Following its usual practice, ICER contracted with an outside group to construct a value assessment framework, in this case a microsimulation model, to generate value claims. The primary outcomes for value claims were incremental cost-per-QALY simulations for four target cystic fibrosis populations. The value assessment, in common with the same model applied earlier by ICER in cystic fibrosis, recommended substantial price discounts based on arbitrary threshold cost-per-QALY values. Unfortunately, the entire exercise, as detailed in previous commentaries in INNOVATIONS in Pharmacy is essentially a waste of time. Not only is the reference case model presented by ICER only one of a multiverse of other models, all driven by a selective application of model structure and assumptions, but the fact that the utilities that are applied to hypothetical time spent in different disease stages to modeled QALYs and lifetime cost-per-QALY claims fail to meet fundamental measurement axioms: they are ordinal manifest scores. Applied to target cystic fibrosis target patient groups, the modeled claims are meaningless. From the manufacturer's perspective, in this case Vertex Pharmaceuticals who have developed all the cystic fibrosis therapies 'modeled' by the ICER contractor, their response to ICER claims should be to reject them out of hand; the constructs are imaginary and the outcome claims nonsense.

More Unnecessary Imaginary Worlds – Part 3: Cystic Fibrosis and the Institute for Clinical and Economic Review’s Draft Evidence Report