Effect of Bei App for Fibromyalgia

Background: Fibromyalgia (FM) is a complex, chronic condition characterized by widespread musculoskeletal pain, cognitive dysfunction, fatigue, and emotional comorbidities such as anxiety and depression. These symptoms severely impact daily functioning and quality of life. Although non-pharmacological strategies-such as therapeutic exercise and patient education-are recommended as first-line treatments, their implementation outside the clinical setting remains a challenge due to low adherence and lack of continuity. Objective: To evaluate the effectiveness of a digital health intervention-BEI app-as a complement to usual care in improving clinical and functional outcomes among patients with fibromyalgia. Methods: This is a randomized controlled trial (RCT) with two parallel arms (1:1 allocation). A total of 70 adult participants with fibromyalgia (diagnosed per ACR 2016 criteria) will be recruited through a patient association in Madrid, Spain. The control group will receive 12 weeks of standard, in-person treatment consisting of group-based education and physical activity. The experimental group will receive the same in-person program plus daily access to the BEI mobile application, which includes educational modules, physical and cognitive training, symptom tracking, and personalized feedback. Outcomes will be assessed at baseline, week 6 (mid-intervention), week 12 (post-intervention), and week 24 (follow-up). Primary outcomes include pain intensity (VAS) and functional impact (FIQR). Secondary outcomes include catastrophizing, self-efficacy, cognitive function, physical activity, anxiety, depression, quality of life, app engagement, and satisfaction. Expected results: The results of this trial will provide evidence regarding the potential of mHealth tools to enhance adherence, self-efficacy, and functional outcomes in individuals with fibromyalgia.