Prevalence of fibromyalgia in a low socioeconomic status population

<p>Abstract</p> <p>Background</p> <p>The aim of this study was to estimate the prevalence of fibromyalgia, as well as to assess the major symptoms of this syndrome in an adult, low socioeconomic status population assisted by the primary health care system in a city in Brazil.</p> <p>Methods</p> <p>We cross-sectionally sampled individuals assisted by the public primary health care system (n = 768, 35–60 years old). Participants were interviewed by phone and screened about pain. They were then invited to be clinically assessed (304 accepted). Pain was estimated using a Visual Analogue Scale (VAS). Fibromyalgia was assessed using the Fibromyalgia Impact Questionnaire (FIQ), as well as screening for tender points using dolorimetry. Statistical analyses included Bayesian Statistics and the Kruskal-Wallis Anova test (significance level = 5%).</p> <p>Results</p> <p>From the phone-interview screening, we divided participants (n = 768) in three groups: No Pain (NP) (n = 185); Regional Pain (RP) (n = 388) and Widespread Pain (WP) (n = 106). Among those participating in the clinical assessments, (304 subjects), the prevalence of fibromyalgia was 4.4% (95% confidence interval [2.6%; 6.3%]). Symptoms of pain (VAS and FIQ), feeling well, job ability, fatigue, morning tiredness, stiffness, anxiety and depression were statically different among the groups. In multivariate analyses we found that individuals with FM and WP had significantly higher impairment than those with RP and NP. FM and WP were similarly disabling. Similarly, RP was no significantly different than NP.</p> <p>Conclusion</p> <p>Fibromyalgia is prevalent in the low socioeconomic status population assisted by the public primary health care system. Prevalence was similar to other studies (4.4%) in a more diverse socioeconomic population. Individuals with FM and WP have significant impact in their well being.</p

A prevalência de fibromialgia: uma revisão de literatura The prevalence of fibromyalgia: a literature review

RESUMO INTRODUÇÃO E OBJETIVO: este trabalho teve como objetivo realizar uma revisão da literatura sobre a prevalência da fibromialgia (FM) na população a partir dos critérios propostos pelo American College of Rheumatology (ACR). MÉTODOS: foi realizado levantamento bibliográfico do período de 1990 a 2005 nas bases de dados MedLine, Lilacs, Embase e ISI. Foram utilizadas as palavras-chave "fibromialgia" e "prevalência" e as correspondentes em inglês, "fibromyalgia" e "prevalence". Foram selecionados 97 artigos e, após leitura dos resumos, foram excluídos os que se referiam à prevalência em doenças. Somente 30 abordavam o tema prevalência da fibromialgia na população. Os artigos selecionados foram agrupados em cinco categorias: a) prevalência da FM em populações adultas; b) prevalência da FM em mulheres; c) prevalência da FM em crianças e adolescentes; d) prevalência da FM em populações específicas; e) prevalência de dor crônica e difusa na população, segundo os critérios do ACR. RESULTADOS: a literatura aponta a prevalência da FM na população com valores entre 0,66 e 4,4%, sendo mais prevalente em mulheres do que em homens, especialmente na faixa etária entre 35 e 60 anos. Os estudos com crianças e adolescentes e em grupos especiais são escassos e pouco conclusivos. A prevalência de dor crônica difusa na população em geral também tem poucos estudos, com valores entre 11 e 13%. CONCLUSÃO: mais estudos sobre prevalência de dor crônica e difusa devem ser estimulados, assim como os de prevalência na população adulta, crianças e jovens.<br>INTRODUCTION AND OBJECTIVE: The aim of this study was to review the literature concerning of the prevalence of fibromyalgia in general population using the criteria from the American College of Rheumatology (ACR). METHODS: The literature envolved the period of 1990 to 2005, in the databases Medline, Lilacs, Embase and ISI. The keywords "fibromialgia" and "prevalência" and the correspondents in English "fibromyalgia" and "prevalence" had been used. It was selected 97 articles and after reading the summaries, the ones related to the fibromyalgia prevalence with oher diseases were excluded. Only 30 articles evoked the subject prevalence of the fibromyalgia in the population. The selected articles were grouped in five items: a) the prevalence of fibromyalgia in adult populations; b) prevalence of fibromyalgia in women; c) prevalence of fibromyalgia in children and adolescents; d) prevalence of fibromyalgia in specific populations; e) prevalence of chronic and diffuse pain in the population according to the ACR criteria. RESULTS: Literature points that the prevalence of fibromyalgia in the general population has values between 0,66 and 4,4%, being more prevalent in women than in men, especially in individuals aged between 35 to 60 years. Studies involving children, adolescents or other special groups are few or inconclusive. The prevalence of chronic and diffuse pain in general population althoug rarily been studied points to values between 11 and 13%. CONCLUSION: More studies on prevalence of chronic and diffuse pain must be stimulated, as well as the ones concerning prevalence in the adult population, children and young