Document Detail

Prevalence of fibromyalgia in children: a clinical study of Mexican children.
MedLine Citation:
PMID:  9779859     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To determine the prevalence of fibromyalgia (FM) in schoolchildren according to the 2 stage classification process proposed by the 1990 American College of Rheumatology (ACR) Multicenter Criteria Committee on Fibromyalgia. METHODS: Stage 1: we administered a pain questionnaire to a sample of 548 schoolchildren (264 boys, 284 girls; mean age 11.9 yrs, range 9-15). Stage 2: two rheumatologists examined all children with diffuse pain. Using thumb palpation, they examined 18 fibromyalgia tender points and 3 pairs of controls points followed by dolorimetry. Additionally, a random sample of 79 children with no pain were selected as controls, following the same procedures (thumb palpation and dolorimetry). The Wilcoxon test was used to compare the distribution of tenderness thresholds between FM and non-FM groups. Kappa statistics for multiple raters was used to assess interobserver agreement. RESULTS: Seven children, all girls, fulfilled the ACR diagnostic criteria for FM. Thus, the prevalence of FM in this group of schoolchildren reached only 1.2%. The girls with FM had a mean of 14 tender points, whereas controls (n = 79) had 2.4. Pain thresholds were 3.4 kg in children with FM and 5.1 kg in controls (p = 0.004). CONCLUSION: The prevalence of FM in our study was 5-fold lower than a previous report. This variance may be due to (1) racial and sociocultural differences between populations; and (2) differences in methodological approach. The difficulties of making accurate estimates of FM across different studies are highlighted.
P Clark; R Burgos-Vargas; C Medina-Palma; P Lavielle; F F Marina
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of rheumatology     Volume:  25     ISSN:  0315-162X     ISO Abbreviation:  J. Rheumatol.     Publication Date:  1998 Oct 
Date Detail:
Created Date:  1999-01-04     Completed Date:  1999-01-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7501984     Medline TA:  J Rheumatol     Country:  CANADA    
Other Details:
Languages:  eng     Pagination:  2009-14     Citation Subset:  IM    
Clinical Epidemiology Unit, Hospital General de Especialidades Bernardo Sepulveda, Universidad Nacional Autónoma de México Faculty of Medicine, Mexico DF.
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MeSH Terms
Fibromyalgia / epidemiology*
Mexico / epidemiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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