The aim of study is to examine the factors that may influence pain, disability and the limitation
of activity due to the presence of fibromyalgia in the foot.
Methods: 323 patients diagnosed with fibromyalgia were recruited. Each participant completed the Foot
Function Index questionnaire (FFI) and the Revised Fibromyalgia Impact Questionnaire (FIQR). A multi-
variate analysis was performed to determine the factors associated with high scores in each of these
questionnaires.
Results: In both questionnaires, the subscales presenting the highest scores were foot pain (FFI score:
71.18 ± 20.40) and symptom intensity (FIQR score: 36.23 ± 8.04). According to the multivariate analysis,
foot function is influenced by age (p = < 0.001), BMI (p = 0.001), lack of physical activity (p = < 0.001), the
presence of rheumatoid arthritis (p = 0.012), retirement due to disability (p = < 0.001) and being un-
employed (p < 0.001).
Conclusion: Fibromyalgia affects foot function, provoking significant pain. Related factors include age, BMI,
lack of physical activity, the presence of rheumatoid arthritis, and employment status.
