Table 2

Frequencies of MRI features in patients with clinically suspect arthralgia assessed using the rheumatoid arthritis MRI scoring system (RAMRIS) dichotomised at several cut-off points

≥1≥2≥3≥4
Synovitis score
 All joints49 (52.7%)28 (30.1%)19 (20.4%)9 (9.7%)
 MCP joints20 (21.5%)7 (7.5%)5 (5.4%)4 (4.3%)
 Wrist35 (37.6%)20 (21.5%)5 (5.4%)2 (2.2%)
 MTP joints20 (21.5%)4 (4.3%)2 (2.2%)2 (2.2%)
BME score
 All joints48 (51.6%)22 (23.7%)9 (9.7%)3 (3.2%)
 MCP joints5 (5.4%)1 (1.1%)
 Wrist38 (40.9%)12 (12.9%)5 (5.4%)2 (2.2%)
 MTP joints17 (18.3%)4 (4.3%)1 (1.1%)1 (1.1%)
Tenosynovitis score*
 All joints50 (66 (35.5%)16 (17.2%)10 (10.8%)5 (5.4%)
 MCP joints25 (26.9%)10 (10.8%)6 (6.5%)4 (4.3%)
 Wrist17 (18.3%)8 (8.6%)4 (4.3%)1 (1.1%)
 MTP jointsNANANANA
Combined inflammation score†
 All joints71 (76.3%)55 (59.1%)41 (44.1%)27 (29.0%)
 MCP joints50 (66 (35.5%)19 (20.4%)9 (9.7%)9 (9.7%)
 Wrist56 (60.2%)39 (41.9%)26 (28.0%)13 (14.0%)
 MTP joints30 (32.3%)12 (12.9%)3 (3.2%)3 (3.2%)
  • *Not assessed in the feet.

  • †Sum of synovitis, BME and tenosynovitis scores.

  • Median total synovitis, BME, tenosynovitis and combined inflammation scores were all low: 1 (IQR 0–2), 1 (IQR 0–1), 0 (IQR 0–1) and 2 (IQR 1–4), respectively. The potential range for the MRI scores according to RAMRIS are 0–36 for synovitis, 0–54 for tenosynovitis, 0–99 for BME and 0–189 for combined inflammation.

  • BME, bone marrow edema; MCP, metacarpophalangeal; MTP, metatarsophalangeal; NA, not assessed.