To compare balance, foot function and mobility in patients with rheumatoid arthritis with and without foot orthoses.
Randomized controlled trial.
Outpatient rheumatology clinic.
A total of 94 subjects with rheumatoid arthritis were randomized; of these, 81 were included in the analyses (Intervention group: 40; Control group: 41).
The Intervention Group received custom-made foot orthoses while the Control Group received none intervention.
The "Foot Function Index," the "Berg Balance Scale," and the "Timed-up-and-go Test" were assessed at baseline an after four weeks. The chosen level of significance was 
Average (standard deviation) participant age was 56.7 (±10.6) years old and average disease duration (standard deviation) was 11.4 (± 7.2) years. Groups were similar at baseline, except for comorbidity index and race. After four weeks, significant interaction group versus time was observed for Foot Function Index (change: Intervention group: -1.23 ± 1.58; Control group: -0.12 ± 1.16 - 
Foot orthoses improved foot function and balance in patients with rheumatoid arthritis.