Cost-effectiveness of an oral cholate challenge test for the management of patients at risk for large esophageal varices

Aims: The dual oral cholate challenge test (DuO) quantifies liver function and portal-systemic shunting. Herein we report the economic impact of the use of the DuO Disease Severity Index (DSI) in the clinical management of patients with chronic liver disease suspected of having large esophageal varices. Methods: A Markov health state transition model of 100,000 patients with chronic liver disease suspected of having varices was populated with previously reported epidemiological, utility, and price data to assess the cost-effectiveness of employing the DuO test against the standard of care. The model examined the clinical and economic impact of healthcare management decisions all centered around the DSI score and given fixed prices of the DuO test. Results: In the target population, the combined strategy of healthcare management decisions based on DSI results would be highly cost-effective within two years for a price of $3,250 per DuO test. These same management decisions would save 2,740 lives over five years. For a price of ≤$3,213 per test, this intervention would be cost-saving within two years, and for ≤$4,100 per test it would be cost-saving within five years. Conclusions: Clinical decisions based on DSI from DuO are cost-effective in the management of patients with chronic liver disease suspected of having large esophageal varices. Future studies of direct comparison of DuO with other noninvasive tests are warranted. The DuO test offers a simplified approach that could enhance the clinical and research utility of liver function testing.