Subgrouping a large U.S. sample of patients with fibromyalgia using the fibromyalgia impact questionnaire-revised

Pérez-Aranda, A. ; Feliu-Soler, A. ; Mist, S.D. ; Jones, K.D. ; López del Hoyo, Y. (Universidad de Zaragoza) ; Oliván-Arévalo, R. ; Kratz, A. ; Williams, D.A. ; Luciano, J.V.

Resumen: 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.

Idioma: Inglés

DOI: 10.3390/ijerph18010247

Año: 2021

Publicado en: International journal of environmental research and public health 18, 1 (2021), 247 [11 pp]
ISSN: 1661-7827

Factor impacto JCR: 4.614 (2021)

Categ. JCR: PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH rank: 45 / 183 = 0.246 (2021) - Q1 - T1
Categ. JCR: PUBLIC, ENVIRONMENTAL & OCCUPATIONAL HEALTH rank: 71 / 210 = 0.338 (2021) - Q2 - T2
Categ. JCR: ENVIRONMENTAL SCIENCES rank: 100 / 279 = 0.358 (2021) - Q2 - T2

Factor impacto CITESCORE: 4.5 - Medicine (Q2) - Environmental Science (Q2)

Factor impacto SCIMAGO: 0.814 - Pollution (Q1) - Health, Toxicology and Mutagenesis (Q1)

Financiación: info:eu-repo/grantAgreement/ES/ISCIII/CPII19-00003

Tipo y forma: Article (Published version)

Área (Departamento): Área Psicología Básica (Dpto. Psicología y Sociología)