RT Journal Article SR Electronic T1 The economic burden of metastatic breast cancer in Spain JF European Journal of Hospital Pharmacy JO Eur J Hosp Pharm FD British Medical Journal Publishing Group SP 19 OP 24 DO 10.1136/ejhpharm-2017-001453 VO 27 IS 1 A1 Begoña Bermejo de las Heras A1 Javier Cortes Ramon y Cajal A1 Elena Galve Calvo A1 Juan de la Haba Rodriguez A1 Jesus Garcia Mata A1 Fernando Moreno Anton A1 Ignacio Pelaez Fernandez A1 Alvaro Rodriguez-Lescure A1 Cesar A Rodriguez Sanchez A1 Manuel Ruiz-Borrego A1 Edit Remak A1 Magdolna Barra A1 Maria Rivero A1 Javier Soto Alvarez YR 2020 UL http://ejhp.bmj.com/content/27/1/19.abstract AB Objectives The study aimed to estimate the burden of metastatic breast cancer (mBC) in Spain over 5 years.Methods An incidence-based cost-of-illness model was developed in which a cohort of patients with mBC was followed from the diagnosis of metastatic disease over 5 years or death. Resource use data were collected through a physician survey conducted with 10 clinical experts in Spain. The model distinguished patients according to HER2 and hormonal receptor (HR) status, and followed the patient cohort in monthly cycles.Results The incident cohort was estimated to be 2,923 patients with mBC, consisting of 1,575 HER2−/HR+, 520 HER2+/HR+, 324 HER2+/HR−, and 503 triple negative patients. The estimated mean survival over the 5-year time period was 2.51 years, on average, with longer survival of 3.36 years for HER2+/HR+, 2.41 years for HER2−/HR+, 2.82 years for HER2+/HR− and shortest mean survival of 1.74 years for triple negative patients. The total costs were €469,92,731 for the overall population, €190,079,787 for the HER2-/HR+, €151,045,260 for the HER2+/HR+, €80,827,171 for the HER2+/HR- and €47,540,512 for the triple negative subgroups over 5 years. Per patient total costs were €160,642 on average, €120,664 for HER2-/HR+, €290,346 for HER2+/HR+, €249,152 for HER2+/HR−and €94,572 for triple negative patients over 5 years.Conclusions The economic burden of mBC in Spain is significant, but differs by HER2 and HR status. HER2−/HR +patients account for the highest burden due to the prevalence of this category, but HER2+/HR +patients have the highest per patient costs.