Table 2 Association between ultrasound abnormalities and development of clinical arthritis/rheumatoid arthritis analyzed at the patient level

Outcome: clinical arthritis

n = 51

n = 112

 Synovial thickening^a (16 joints)

19 (37%)

30 (27%)

0.18^c

 Synovial thickening (10 joints, no MTP)

10 (20%)

4 (4%)

< 0.01^d

 Power Doppler^a (16 joints)^b

2 (4%)

5 (5%)

1.0.^d

Outcome: 2010 RA criteria

n = 44

n = 119

 Synovial thickening (16 joints)

17 (39%)

32 (27%)

0.15^c

 Synovial thickening (10 joints, no MTP)

10 (23%)

4 (3%)

< 0.01^d

 Power Doppler (16 joints)^b

2 (5%)

5 (4%)

1.0^d