Functional status, quality of life, and costs associated with fibromyalgia subgroups a latent profile analysis

Juan V. Luciano*, Carlos G. Forero, Marta Cerda-Lafont, Maria Teresa Pen arrubia-Maria, Rita Fernandez-Vergel, Antonio I. Cuesta-Vargas, Jose M. Ruiz, Antoni Rozadilla-Sacanell, Elena Sirvent-Alierta, Pilar Santo-Panero, Javier Garcia-Campayo, Antoni Serrano-Blanco, Adrian Perez-Aranda, Maria Rubio-Valera

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

28 Citations (Scopus)

Abstract

Objectives: Although fibromyalgia syndrome (FM) is considered a heterogeneous condition, there is no generally accepted subgroup typology. We used hierarchical cluster analysis and latent profile analysis to replicate Giesecke's classification in Spanish FM patients. The second aim was to examine whether the subgroups differed in sociodemographic characteristics, functional status, quality of life, and in direct and indirect costs. Materials and Methods: A total of 160 FM patients completed the following measures for cluster derivation: the Center for Epidemiological Studies-Depression Scale, the Trait Anxiety Inventory, the Pain Catastrophizing Scale, and the Control over Pain subscale. Pain threshold was measured with a sphygmomanometer. In addition, the Fibromyalgia Impact Questionnaire-Revised, the EuroQoL-5D-3L, and the Client Service Receipt Inventory were administered for cluster validation. Results: Two distinct clusters were identified using hierarchical cluster analysis ("hypersensitive" group, 69.8% and "functional" group, 30.2%). In contrast, the latent profile analysis goodness-offit indices supported the existence of 3 FM patient profiles: (1) a "functional" profile (28.1%) defined as moderate tenderness, distress, and pain catastrophizing; (2) a "dysfunctional" profile (45.6%) defined by elevated tenderness, distress, and pain catastrophizing; and (3) a "highly dysfunctional and distressed" profile (26.3%) characterized by elevated tenderness and extremely high distress and catastrophizing. We did not find significant differences in sociodemographic characteristics between the 2 clusters or among the 3 profiles. The functional profile was associated with less impairment, greater quality of life, and lower health care costs. Discussion: We identified 3 distinct profiles which accounted for the heterogeneity of FM patients. Our findings might help to design tailored interventions for FM patients.

Original languageEnglish
Pages (from-to)829-840
Number of pages12
JournalClinical Journal of Pain
Volume32
Issue number10
DOIs
Publication statusPublished - 2016

Keywords

  • Cluster analysis
  • Fibromyalgia subgroups
  • Latent profile analysis

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