Perceived function and physical performance are associated with pain and fatigue in women with fibromyalgia

Dana L. Dailey, Laura A. Frey Law, Carol G.T. Vance, Barbara A. Rakel, Ericka N. Merriwether, Leon Darghosian, Meenakshi Golchha, Katharine M. Geasland, Rebecca Spitz, Leslie J. Crofford, Kathleen A. Sluka

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Fibromyalgia is a condition characterized by chronic widespread muscle pain and fatigue and associated with significant impairment in perceived function and reduced physical performance. The purpose of this study was to determine the degree to which pain and fatigue are associated with perceived function and physical performance in women with fibromyalgia. Methods: Hierarchical linear regression determined the contribution of pain and fatigue (Numeric Rating Scale (NRS) for resting, movement and combined) to perceived function (Fibromyalgia Impact Questionnaire Revised - Function Subscale, FIQR-Function), Multidimensional Assessment of Fatigue - Activities of Daily Living (MAF-ADL) and SF-36 Physical Function Subscale (SF-36-PF) and physical performance (6-Minute Walk Test, 6MWT and Five Time Sit To Stand, 5TSTS) while controlling for age, body mass index, pain catastrophizing, fear of movement, anxiety, and depression in women with fibromyalgia (N = 94). Results: For perceived function, movement pain and movement fatigue together better predicted FIQR-function (adjusted R2 = 0.42, p ≤ 0.001); MAF-ADL (adjusted R2 = 0.41, p ≤ 0.001); and SF-36-PF function (adjusted R2 = 0.34, p ≤ 0.001). For physical performance measures, movement pain and fatigue together predicted 6MWT distance (adjusted R2 = 0.42, p ≤ 0.001) and movement fatigue alone predicted performance time on the 5TSTS (adjusted R2 = 0.20, p ≤ 0.001). Conclusions: Pain and fatigue are significantly associated with and explain more than one-third of the variance in perceived function and physical performance in women with fibromyalgia. Trial registration: NIH Clinicaltrials.gov Registration: NCT01888640. Registered 13 June 2013.

Original languageEnglish (US)
Article number68
JournalArthritis Research and Therapy
Volume18
Issue number1
DOIs
StatePublished - Mar 16 2016

ASJC Scopus subject areas

  • Rheumatology
  • Immunology and Allergy
  • Immunology

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