... of a proposed WOMAC short form forpatients with hip osteoarthritisAmaia Bilbao1*, José M Quintana2, Antonio Escobar3, Carlota Las Hayas2and Miren Orive2AbstractBackground: The aims ... composed of eight items . Thus, we proposed an11-items WOMAC short form. A complete validation proce ss was performed, including confirmatory factor analysis(CFA) and Rasch analysis, and a study of ... Innovation and Research (BIOEF)-CIBEREpidemiolog a y Salud Pública (CIBERESP), Sondika, Bizkaia, SpainFull list of author information is available at the end of the articleBilbao et al. Health...