99062 20230519145437.0 doi 10.3390/ijerph18010247 sideral 122313 ART-2021-122313 eng Pérez-Aranda, A. Subgrouping a large U.S. sample of patients with fibromyalgia using the fibromyalgia impact questionnaire-revised 2021 Access copy available to the general public Unrestricted Fibromyalgia (FM) is a heterogeneous and complex syndrome; different studies have tried to describe subgroups of FM patients, and a 4-cluster classification based on the Fibromyalgia Impact Questionnaire-Revised (FIQR) has been recently validated. This study aims to cross-validate this classification in a large US sample of FM patients. A pooled sample of 6280 patients was used. First, we computed a hierarchical cluster analysis (HCA) using FIQR scores at item level. Then, a latent profile analysis (LPA) served to confirm the accuracy of the taxonomy. Additionally, a cluster calculator was developed to estimate the predicted subgroup using an ordinal regression analysis. Self-reported clinical measures were used to examine the external validity of the subgroups in part of the sample. The HCA yielded a 4-subgroup distribution, which was confirmed by the LPA. Each cluster represented a different level of severity: “Mild–moderate”, “moderate”, “moderate–severe”, and “severe”. Significant differences between clusters were observed in most of the clinical measures (e.g., fatigue, sleep problems, anxiety). Interestingly, lower levels of education were associated with higher FM severity. This study corroborates a 4-cluster distribution based on FIQR scores to classify US adults with FM. The classification may have relevant clinical implications for diagnosis and treatment response. info:eu-repo/grantAgreement/ES/ISCIII/CPII19-00003 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 4.614 2021 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH 45 / 183 = 0.246 2021 Q1 T1 PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH 71 / 210 = 0.338 2021 Q2 T2 ENVIRONMENTAL SCIENCES 100 / 279 = 0.358 2021 Q2 T2 0.814 2021 Pollution 2021 Q1 Health, Toxicology and Mutagenesis 2021 Q1 4.5 2021 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Feliu-Soler, A. Mist, S.D. Jones, K.D. López del Hoyo, Y. Universidad de Zaragoza (orcid)0000-0002-1690-4130 Oliván-Arévalo, R. Kratz, A. Williams, D.A. Luciano, J.V. 4009 730 Universidad de Zaragoza Dpto. Psicología y Sociología Área Psicología Básica 18, 1 (2021), 247 [11 pp] Int. j. environ. res. public health International journal of environmental research and public health 1661-7827 454880 http://zaguan.unizar.es/record/99062/files/texto_completo.pdf Versión publicada 2666977 http://zaguan.unizar.es/record/99062/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:99062 articulos driver 2023-05-18-14:25:54 ARTICLE