Análisis de coste efectividad de fesoterodina comparado con mirabegron en el marco de tratamiento de primera línea para vejiga hiperactiva con incontinencia urinaria de urgencia, desde la perspectiva del Sistema Nacional de Salud español

Abstract

ObjectivesTo evaluate the cost-effectiveness of first-line treatment of Overactive Bladder (OAB) with fesoterodine relative to mirabegron, from the Spanish National Health System (NHS) perspective. MethodsA decision tree model was developed to represent a typical clinical process of 52-week of treatment for an OAB patient with urge urinary incontinence (UUI) initiating first-line therapy with fesoterodine 4mg, including optional titration to 8mg, vs.mirabegron 50mg. Efficacy data were obtained from a Bayesian indirect treatment meta-analysis. Patients with UUI of less than one episode/day were defined as treatment responder and persistence was assessed at weeks 4, 12 and 24. At week 12, non-responders discontinued treatment permanently. Quality-adjusted life years (QALYs) were calculated based on time spent in responder and non-responder states. OAB-related drug and medical care costs including physician visits, laboratory tests, incontinence pads, and comorbidities (fracture, skin infection, urinary tract infections and depression) were modeled and expressed in €2015. ResultsAt week 52, the percentage of responders was 20.8% for patients starting on fesoterodine 4mg who optionally titrated to 8mg and 19.4% for patients treated with mirabegron. QALYs were slightly higher with fesoterodine than mirabegron (0.7703vs. 0.7668, difference=0.0035). Fesoterodine treatment also had slightly higher total costs than mirabegron (3,296€vs. 3,217, difference=79€), resulting in a cost of 22,523/QALY€ gained for fesoterodine versus mirabegron. Probabilistic sensitivity analysis confirmed the slight advantage of fesoterodine with a 61.1% probability of being cost-effective at the 30,000€ willingness-to-pay for 1QALY threshold. ConclusionsGiven the relatively small 1-year cost difference between the two treatments, fesoterodine can be considered a cost-effective option relative to mirabegron for the first-line management of OAB with UUI in Spain.