Demographic, clinical, biomechanical, and radiographic variables.
| Variables | |
|---|---|
| Demographics, mean (SD) | |
| Sex (F/M, n) | 11/4 |
| Age, yrs | 29.4 (9.8) |
| Disease duration, yrs | 7.5 (9.0; range 0.2–27) |
| Disease characteristics, mean (SD) | |
| Rheumatoid factor-positive, n | 11 |
| DAS44 (CRP, mg/l) | 2.71 (0.62) |
| DAS44 (ESR, mm/h) | 2.83 (0.68) |
| Patient-reported measures, mean (SD) | |
| VAS forefoot pain | 37.7 (27.2; range 8–95) |
| LFISIF | 12.4 (2.5; range 7–16) |
| LFISAP | 14.9 (8.7; range 3–30) |
| Forefoot deformity | |
| Platto Structural Index Score, mean (SD) | 6.0 (4.1) |
| Subluxation 2nd MTP joint, n | 8 |
| Subluxation 3rd MTP joint, n | 8 |
| Subluxation 4th MTP joint, n | 8 |
| Subluxation 5th MTP joint, n | 4 |
| Plantar callus 2nd MTP joint, n | 6 |
| Plantar callus 3rd MTP joint, n | 1 |
| Plantar callus 4th MTP joint, n | 0 |
| Plantar callus 5th MTP joint, n | 1 |
| Gait measures, mean (SD) | |
| Velocity, cm/s | 95.4 (29.9) |
| Peak pressure 2nd MTP joint, kPa | 730.9 (387.6) |
| Peak pressure 3rd MTP joint, kPa | 531.4 (211.8) |
| Peak pressure 4th MTP joint, kPa | 248.0 (76.5) |
| Peak pressure 5th MTP joint, kPa | 313.1 (281.75) |
| Larsen score, median (IQR) | |
| 2nd MTP joint | 1 (0–4) |
| 3rd MTP joint | 1 (0–4) |
| 4th MTP joint | 1 (0–3) |
| 5th MTP joint | 2 (0–3) |
DAS: Disease Activity Score; CRP: C-reactive protein; ESR: erythrocyte sedimentation rate; VAS: visual analog scale; LFISIF: Leeds Foot Impact Scale to assess impairment and footwear; LFISAP: LFIS to assess activity and participation; MTP: metatarsophalangeal; kPa: barefoot peak pressure; IQR: interquartile range.