BACKGROUND: The ProFibro application (app) was developed as a Mobile Health resource to promote self-care in fibromyalgia management. OBJECTIVE: This study aimed to assess the effects of the use of the ProFibro app for six weeks compared to the use of a traditional paper book of similar content to improve health-related quality of life, symptoms, and self-care agency in individuals with fibromyalgia. METHODS: Forty individuals with fibromyalgia were included in this randomized, single-blind, parallel trial. One group received intervention content using the ProFibro app on a smartphone while the other received similar information using a paper book. Participants were assessed at baseline and after six weeks. The primary outcome was the Revised Fibromyalgia Impact Questionnaire. Secondary outcomes were Widespread Pain Index, pain visual analog scale, Symptom Severity Scale, and Appraisal of Self-Care Agency Scale -- Revised. RESULTS: No differences in changes were found between groups at the end of the treatment for any outcome. Both groups showed improvements in symptom severity. CONCLUSIONS: The use of the ProFibro app for six weeks was not more effective than the use of a traditional paper book with similar content for health-related quality of life, symptoms, or self-care agency in individuals with fibromyalgia. Both groups showed improvements from baseline on severity of symptoms, suggesting that the self-care program using a mobile app or a paper book may be beneficial for individuals with fibromyalgia.

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