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Association between chronic widespread musculoskeletal complaints and thyroid autoimmunity. Results from a community
1Department of Community Medicine and General Practice, University of Oslo, Norway.
Objective:
To test a hypothesis derived from observations in general practice that thyroid antibodies were associated with chronic widespread musculoskeletal complaints.
Design:
Cross-sectional study of 40-42 year old men and women based on a self-administered questionnaire and on results of blood tests.
Setting:
Sarpsborg municipality, Norway.
Participants:
737 men and 771 women who attended the National Health Screening Service's mobile unit in 1989 and answered the questionnaire.
Main Outcome Measures:
Prevalence of detectable microsomal thyroid antibodies in persons with and without chronic widespread musculoskeletal complaints.
Results:
The prevalence of thyroid microsomal antibodies was significantly higher in persons with than without chronic widespread musculoskeletal complaints (16.0% versus 7.3%, p < 0.01). The increase was restricted to women (20.4% versus 11.6%, p = 0.02). Thyroid function tests did not differ significantly between the two groups.
Conclusion:
The association between chronic widespread musculoskeletal pain complaints and thyroid antibodies in women may reflect a subgroup of patients in which thyroid autoimmunity, rather than thyroid function, is important. A possible relationship to fibromyalgia is discussed as well as a hypothetical role for thyrotropin releasing hormone.