Cost-Utility of an Exercise Referral Scheme Versus Doing Nothing in Flemish Adults: Exploring the Impact of Key Assumptions.

If it is possible to induce a sustainable behavioral change with an intervention delivered at 2- or 5-year intervals, then the Flemish ERS is potentially cost-effective compared with doing nothing (given a €40,000/QALY threshold). These results suggest the importance of repeated implementation of the program together with careful monitoring of the adherence and the sustainability of the observed effects in a real-world setting.