The Longitudinal Outcome of Fibromyalgia: A Study of 1,555 Patients
How fibromyalgia symptoms and diagnostic status changed over time in a large clinical cohort.
- Published
- 2011
- Authors
- Brian Walitt, Mary-Ann Fitzcharles, Afton L. Hassett, Robert S. Katz, Winfried Häuser, and Frederick Wolfe
- Institution
- National Data Bank for Rheumatic Diseases
- Country
- United States
- Journal
- The Journal of Rheumatology
- Study design
- Longitudinal observational cohort
- Participants
- 1,555 patients across 11,006 semiannual observations, followed for up to 11 years
- Population
- People diagnosed with fibromyalgia by U.S. rheumatologists who completed repeated outcome questionnaires.
- PubMed
- PMID 21765102
What researchers were investigating
How fibromyalgia symptoms and diagnostic status changed over time in a large clinical cohort.
Main findings
- Average symptom burden remained high, with a small overall trend toward improvement.
- About one quarter had at least moderate pain improvement, while outcomes varied considerably.
- Many participants moved in and out of criteria-positive status at least once, showing that a threshold score is not a fixed identity.
Limitations and quality of evidence
- This was observational and cannot show why outcomes changed.
- Questionnaires and diagnostic criteria changed over time.
- A specialty-referred U.S. cohort may not represent every person with fibromyalgia.
The large, long follow-up describes real-world trajectories well, but observational data cannot identify effective treatments or causes.
What this may mean in everyday life
- Fibromyalgia can be persistent without being identical every year or every day.
- Group averages should not be used to promise recovery or to remove hope from an individual.
Questions the research leaves unanswered
- What predicts meaningful improvement?
- Which combinations of care improve function over years?
- How do social conditions and coexisting illnesses affect trajectories?
Personal observation
No personal observation has been attached to this study summary. If Lissa later adds one, it will be labeled as personal experience—not evidence.
The Living Research Journal shares scientific research, personal experiences, and educational wellness information. It is not medical advice, diagnosis, or treatment. My personal observations are not clinical evidence, and individual experiences may differ. Always consult a qualified healthcare professional before making medical decisions.
