RT Journal Article T1 Symmetry Criterion for Patients with Rheumatoid Arthritis of the Foot: A Cross-Sectional Study A1 Sanchez-Castillo, Jose Alberto A1 Reinoso-Cobo, Andres A1 Gijon-Nogueron, Gabriel A1 Caliz-Caliz, Rafael A1 Exposito-Ruiz, Manuela A1 Ramos-Petersen, Laura A1 Ortega-Avila, Ana Belen K1 Rheumatoid arthritis K1 Foot health K1 Symmetry K1 Functionality K1 Pain K1 Artritis reumatoide K1 Dolor K1 Estudios transversales K1 Inflammation AB Objective: The aim of the study was to analyze the feet of rheumatoid arthritis (RA) patients, to determine the degree to which both feet were affected, primarily analyzing the severity of RA in both feet looking at structure and morphology, and secondly looking at the symmetry in terms of the anthropometrics and posture. Method: This cross-sectional study was conducted from January to December 2018. The data from 229 patients with RA and with foot pain and no RA recruited (Granada, Spain) were analyzed. Two researchers independently interviewed the patients to obtain the study data. The clinical data were obtained using specific foot health and quality of life questionnaires and a validated platform for foot measurement. Anthropometric measurements were obtained by means of a foot measurement platform and the Foot Posture Index (FPI). The bivariate analysis was performed with the Student’s t test and the non-parametric Wilcoxon test. The level of significance was established at p < 0.05. Results: In the RA group, anthropometric measurements revealed significant differences between the left and right feet in 13 of the 23 parameters considered, as follows: (non-load-bearing) foot length, length of the first metatarsophalangeal joint, maximum height of the internal longitudinal arch, and width of the midfoot (p < 0.001, p = 0.038, p < 0.001, and p = 0.037 respectively); and Foot Posture Index (p = 0.001). Conclusions: In patients with RA, statistically significant differences were found in the Foot Posture Index and in several parameters related to foot structure and morphology. From this, we conclude that from a morphological, structural, and postural standpoint, a pattern of symmetric joint involvement should not be viewed as a specific criterion for RA in the foot. PB MDPI SN 1661-7827 YR 2021 FD 2021-03-31 LK http://hdl.handle.net/10668/3755 UL http://hdl.handle.net/10668/3755 LA en NO Sanchez-Castillo JA, Reinoso-Cobo A, Gijon-Nogueron G, Caliz-Caliz R, Exposito-Ruiz M, Ramos-Petersen L, et al. Symmetry Criterion for Patients with Rheumatoid Arthritis of the Foot: A Cross-Sectional Study. Int J Environ Res Public Health. 2021 Mar 31;18(7):3619 DS RISalud RD Apr 6, 2025