Psychometric validation of the Spanish version of the Expanded Prostate Cancer Index Composite-26.

"Declarations Conflict of interestOlatz Garin and Montse Ferrer certify that all conflicts of interest including specific financial interests and relationships and affiliations relevant to the subject matter or materials discussed in the manuscript (e.g., employment/affiliation, grants or funding, consultancies, honoraria, stock ownership or options, expert testimony, royalties, or patents filed, received, or pending), are the following: none. Ethical statementThe present study has been reviewed and approved by the Institutional Review Board at the Hospital del Mar Medical Research Institute, in accordance with the 2000 Declaration of Helsinki. The study was also approved by the ethics committees from the participating sites: Institut Català d’Oncologia-L’Hospitalet, Hospital Regional Universitario de Málaga, Hospital Universitari de Bellvitge, Hospital del Mar, Hospital Provincial de Castellón, Hospital Universitario Central de Asturias, Hospital Universitario Rey Juan Carlos, Hospital Universitario de Salamanca, Hospital General Universitario de Ciudad Real, Institut Català d’Oncologia-Badalona, Hospital Universitario de Navarra, Hospital General Universitario de Valencia, Hospital de la Santa Creu i Sant Pau, Hospital do Meixoeiro, Hospital Universitario Reina Sofía, and Hospital General Universitario de Albacete. Written informed consent was provided by all subjects when they were enrolled. Informed consentInformed consent was obtained from all individual participants included in the study. Conflict of interest Olatz Garin and Montse Ferrer certify that all conflicts of interest including specific financial interests and relationships and affiliations relevant to the subject matter or materials discussed in the manuscript (e.g., employment/affiliation, grants or funding, consultancies, honoraria, stock ownership or options, expert testimony, royalties, or patents filed, received, or pending), are the following: none."

"Funding Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This work was supported by the Instituto de Salud Carlos III and co-funded by the European Union (Grants PI21/00023, PI13/00412, PI11/01191, and FI19/00229); Fundación Pública Andaluza Progreso y Salud de la Junta de Andalucía (PI-0102-2011); Proyectos Estratégicos of the Fundación Científica Asociación Española Contra el Cáncer (PRYES223070FERR); Generalitat de Catalunya, Spain (2021 SGR 00624); and Movember Foundation’s TrueNTH Global Registry. The funders of the study had no role in the study concept and design, acquisition of data, support, analysis, or interpretation; they also had no role in the preparation, writing, reviewing, and submission of this manuscript."