Electronic supplementary material
Materials and methods
Confirmation of RA diagnosis and disease activity
Assessment of demographic and clinical characteristics
MSUS Scanning Training and Protocol Development
The nature of the test was explained
The forefeet of all participants were scanned by the investigator using a broadband linear probe of 5 – 10 MHz frequency.
The participant was asked to sit in a supine position on the bed.
The participant's hosiery was removed and the ultrasound probe placed on the plantar aspect of each foot.
Scans were taken according to the EULAR standard approach from the plantar aspect of the foot .
Each MTP joint and inter-metatarsal space was scanned longitudinally and transversely from the plantar view.
Images of the plantar aspects of the forefoot in both feet were recorded in transverse and longitudinal aspects and saved on the ultrasound machine hard drive.
Observations of synovitis and erosions of the second and fifth metatarsophalangeal joints and any evidence of bursitis were noted on a separate data collection sheet.
Time since RA diagnosis (years)
Overall well being (100 mm VAS)
Disease activity Score-28 joints
Pod presence (N)
Pod Absence (N)
Rad Bursitis Presence (N)
Rad Bursitis Absence (N)
Rad Erosion Presence (N)
Rad Erosion Absence (N)
Rad Synovitis Presence (N)
Rad Synovitis Absence (N)