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Prevalence of fibromyalgia and assessment of associated symptoms, functional disability and quality of life, in the Embu population, Sao Paulo

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Author(s):
Ana Assumpção
Total Authors: 1
Document type: Master's Dissertation
Press: São Paulo.
Institution: Universidade de São Paulo (USP). Faculdade de Medicina (FM/SBD)
Defense date:
Examining board members:
Amelia Pasqual Marques; Silvia Maria Amado João; José Eduardo Martinez
Advisor: Amelia Pasqual Marques
Abstract

Fibromyalgia is a rheumatic syndrome characterized by chronic widespread pain, tender points, fatigue, sleep disorders and morning stiffness. Functional Disability and negative impact in the quality of life are frequent. Studies show a fibromyalgia prevalence around 2% and 3%. The aim of this study was to assess the prevalence of fibromyalgia, associated symptoms, functional disability and quality of life in residents of Embu, SP, Brazil. The sample was selected in individuals of the primary health care, aged by 35 and 60 years old. Of all 2269 subjects with phone number, we interviewed 768 with questions about presence of pain, pain location and time of pain. Of these subjects, 304 were personally evaluated, including tender points examination and assessment of pain by the Visual Analogue Scale (VAS), sleep disorders by the Post Sleep Inventory (PSI), fatigue by the Chalder Fatigue Scale, functional disability by Stanford Health Assessment Questionnaire (HAQ) and quality life by the Fibromyalgia Impact Questionnaire (FIQ). The data were analysed using Descriptive, Baeysian and Interferential Analyses (Kruskal-Wallis, Friedmam, ANOVA, with significance level of 5%), Contingence Tables and Conditional Probabilities. The 768 subjects were distributed in three groups: Without Pain (WP) - 185 individuals, Regional Pain (RP) - 388 individuals and Widespread pain (WpP). In the sub-sample of 304 subjects, the groups of chronic widespread pain were classified in Fibromyalgia (FM), with 19 subjects, and Non-Fibromyalgia, with 87 subjects. The mean age was 47,9 (7,2) years old for 768 sample and 49,1 (6,8) for the 304 sub-sample. The prevalence of chronic widespread pain was 24%, with 95% credibility interval [21%; 27%] and fibromyalgia prevalence was 4,4%, with 95% credibility interval [2,6%; 6,3%]. Pain, sleep disorders, fatigue, functional disability and quality of life were worse in the FM Group, followed by WpP, RP and WP. The major probability coincidence were obtained by VAS, HAQ FIQ and Global indices (mean of all questionnaires). This kind of assessment has high probability (94%) to identify non-fibromyalgia individuals and considerable (67%) to possible fibromyalgia patients (AU)