Abstract
BackgroundThe Medical Services Advisory Committee (MSAC) is responsible for the assessment of medical imaging tests proposed for public funding. A number of factors related to the clinical or cost effectiveness of an imaging service may impact on the funding decision.ObjectiveTo determine what evidentiary and economic factors impact most on MSAC recommendations for the funding of imaging tests.MethodsInformation was extracted on health technology assessments (HTAs) of medical imaging tests published on the MSAC website, with a funding decision between 2006 to July 2021. Imaging tests with diagnostic, staging or screening indications were eligible. Data were extracted in test‐indication pairs and included data on evidence quality, quantity, consistency of findings, cost‐effectiveness and financial impact. Multivariate logistic regression analysis was performed with adjustments for clustered data.ResultsOverall, 42 imaging test applications to MSAC were included, representing 91 clinical indications. Most were diagnostic tests. The most common evidentiary concerns reported by MSAC were limited evidence (36%), low quality evidence (26%), and applicability of the data (22%). The reference standard for diagnostic accuracy was imperfect or not appropriate in 25% of the indications. In regression analyses, uncertainty about cost‐effectiveness of an imaging service predicted most negative funding decisions.ConclusionsThe single biggest contributor to a negative funding decision by MSAC was uncertainty about the cost‐effectiveness of the imaging service. This was likely driven by uncertainty regarding the impact on patient health. HTAs that are able to demonstrate the clinical utility of a new imaging service are more likely to publicly funded.
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