Objective The aim of this study was to translate to Spanish the patellofemoral pain and osteoarthritis subscale of the knee injury and osteoarthritis outcome score (KOOS-PF) and validate this Spanish version of a disease-specific patient-reported outcome measure (PROM) for patellofemoral pain. Results The KOOS-PF was translated to Spanish and sixty patients with patellofemoral pain and/or osteoarthritis accepted to complete the questionnaire. 1-week later 58 patients answered the questions again for the test–retest reliability validation and finally 55 patients completed 1-month later for the responsiveness assessment. The Spanish version showed very good internal consistency (Cronbach’s alpha: 0.93) and test–retest reliability (intraclass correlation coefficient: 0.82). Responsiveness was confirmed, showing a strong correlation with the global rating of change (GROC) score (r 0.64). The minimal detectable change was 11.1 points, the minimal important change was 17.2 points, and there were no floor or ceiling effects for the score.
Introducción. El síndrome del túnel carpiano es la neuropatía compresiva más común en consulta médica. Su tratamiento quirúrgico consiste en la liberación del ligamento transverso del carpo. Objetivo. Describir los resultados y las complicaciones postoperatorias presentadas en pacientes sometidos a liberación endoscópica del túnel del carpo. Materiales y métodos. Estudio de serie de casos retrospectivo que incluyó los pacientes mayores de 14 años a los que se les realizó liberación endoscópica del túnel del carpo entre enero 2011 y diciembre 2014 en la Fundación Valle del Lili (Cali, Colombia). Se realizó seguimiento al mes y a los seis meses postoperatorios y se evaluaron desenlaces clínicos y complicaciones. Resultados. Se incluyeron 270 pacientes que fueron operados durante el tiempo del estudio. 27 de ellos no asistieron al control del primer mes postoperatorio, por lo que se perdió su seguimiento, y de los 243 evaluados, 171 no tenían síntomas residuales (alteraciones sensitivas, alteraciones de la fuerza o despertares nocturnos). Al sexto mes postoperatorio solo 146 pacientes asistieron al seguimiento, de los cuales 124 no presentaban síntomas residuales. La complicación más frecuente fue el dolor crónico de los pilares, presente en 23 de 146 pacientes. No hubo ninguna lesión neurovascular. Conclusión. La liberación endoscópica del túnel del carpo es un procedimiento seguro y efectivo para el tratamiento quirúrgico del síndrome del túnel carpiano. Nivel de evidencia: IV.
Background: Patellofemoral pain is a very common complaint in orthopedic sports medicine clinics. Disease-specific patient-reported outcome measures (PROMs) are useful for research and clinical practice; thus, it is important to have validated translations available for new PROMs. This study aims to translate and validate the Spanish version of the patellofemoral pain and osteoarthritis subscale of the knee injury and osteoarthritis outcome score (KOOS-PF).Methods: The KOOS-PF was translated and culturally adapted to Spanish following current guidelines, which included translation, back-translation, conciliation and pilot studies. Patients with a diagnosis of patellofemoral pain and/or osteoarthritis from one medical center were invited to participate and complete the questionnaire. The evaluation of the score included internal consistency (Cronbach´s alpha), floor and ceiling effects, measurement error, minimal detectable change and minimal important change. For test-retest reliability, the intraclass correlation coefficient (ICC) was used, and for responsiveness, the global rating of change (GROC) scale was measured one month later.Results: Sixty patients with patellofemoral pain and/or osteoarthritis were included in the study. The Spanish version showed very good internal consistency (Cronbach’s alpha: 0.93) and test-retest reliability (intraclass correlation coefficient: 0.82). Responsiveness was confirmed, with the KOOS-PF demonstrating a strong correlation with the GROC score (r 0.64). The minimal detectable change was 11.1 points, the minimal important change was 17.2 points, and there were no floor or ceiling effects for the score.Conclusions: The Spanish version of the KOOS-PF demonstrated very good measurement properties, including internal consistency, reliability and responsiveness. The KOOS-PF can be used in Spanish-speaking patients for clinical and research purposes in patellofemoral pain and osteoarthritis.Trial registration: Fundación Valle del Lili, Biomedical Research Ethical Committee: No. 01438.
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