Relationship Between Balance and Vitamin D in Fibromyalgia Syndrome: A Prospective Cross-Sectional Study with HUR BTG4 Balance Master System®

This study aims to show the relationship between balance and vitamin D levels in fibromyalgia. It also aims to raise awareness about the link between vitamin D levels, disease severity, and balance. This prospective study included 86 patients diagnosed with fibromyalgia (FMS) based on the 2010 criteria of the American College of Rheumatology (ACR) and 47 healthy controls. All participants completed self-report questionnaires, and static and dynamic balance assessments were performed after signed informed consent was obtained. Evaluations were carried out in the same order for all participants. The body mass index (BMI) was calculated as kg/m 2 . Serum vitamin D levels were determined. Static and dynamic balance assessment was performed using the HUR BTG4 Balance Master-System (HUR International, Finland) balance and Berg Balance Scale (BBS) test. Visual Analog Scale (VAS), Fibromyalgia Impact Questionnaire (FIQ), the Berg Balance Scale (BBS) were informed. Data were obtained from 86 patients with FMS and 47 healthy participants. There was a significant difference between the mean values of the FIQ, VAS, and BBS in FMS ( p < 0.05). A negative correlation was found between BBS and 25(OH) vitamin D levels in FMS ( r : − 0167, p < 0.05). There was a significant difference in the static balance data in the regression analyses between the groups ( R : 0.40. R 2 : 0.16 p : 0.000). The regression analysis found that FIQ scores increased with the decrease in vitamin D values ( R : 0.41 R 2 : 0.17 p < 0.001). Static balance is markedly impaired in low vitamin D levels. Vitamin D has an important place in the treatment management of FMS and the correction of its negative effects on life. In addition to assessing balance, the information that the device provides to improve individual activities will also improve the quality of rehabilitation.