Demographic and ultrasound data: development set
| RA (n=169) | PsA (n=39) | UA (n=30) | SA (n=35) | OA (n=22) | HS (n=154) | |
| Age (years) | 61±15 | 58±13 | 61±14 | 64±15 | 61±11 | 52±17 |
| Female sex (%) | 75.1 | 59.0 | 60.0 | 60.0 | 90.9 | 57.8 |
| Active synovitis (%) | 43.8 | 20.5 | 56.7 | 57.1 | 4.5 | NA |
| Active synovitis (GS sum score) | 5 (3, 8) | 6 (2, 9) | 5 (3, 14) | 4 (3, 5) | 2 (2, 2) | NA |
| Active synovitis (PD sum score) | 2 (2, 4) | 3 (2, 5) | 3 (2, 8) | 2 (1, 3) | 1 (1, 1) | NA |
Distributions are presented as mean±SD or median (IQR).
GS, grey-scale synovial hypertrophy; HS, healthy subjects; OA, osteoarthritis; PD, power Doppler; PsA, psoriatic arthritis; RA, rheumatoid arthritis; SA, arthritis of hands secondary to other diseases; UA, undifferentiated arthritis.