Skip to main content

Table 3 MRI, XR and bone densitometry in AM vs non-AM erosive PsA

From: MRI bone oedema scores are higher in the arthritis mutilans form of psoriatic arthritis and correlate with high radiographic scores for joint damage

MRI (dominant wrist and fingers) AM non-AM p value
Bone erosion score (PAMRIS) 53.0* (28 to 125) 15.0 (3 to 22) 0.004
   MCPs bone erosion** 1.8 (0.4 to 16.3) 1.0 (0 to 4) 0.045
   PIPs bone erosion 2.8 (0 to 20) 0.4 (0 to 3.4) 0.036
   DIPs bone erosion 1.3 (0 to 8.8) 0.0 (0 to 3.4) 0.018
Bone oedema score (PAMRIS) 14.7 (8.3 to 19.5) 10.0 (2.0 to 12.5) 0.056
   MCPs bone oedema 0.0 (0 to 3) 0.0 (0 to 2.3) 0.71
   PIPs bone oedema 0.0 (0 to 3.8) 0.0 (0 to 1.5) 0.74
   DIPs bone oedema 0.0 (0 to 4) 0.0 (0 to 2.8) 0.74
Bone proliferation score (PAMRIS) 3.6 (2.2 to 5.0) 0.7 (0.2 to 2.1) 0.003
   MCPs bone proliferation 0.3 (0 to 1) 0.0 (0 to 0.8) 0.037
   PIPs bone proliferation 0.3 (0 to 0.9) 0.0 (0 to 0.5) 0.13
   DIPs bone proliferation 0.3 (0 to 0.6) 0.0 (0 to 1.0) 0.021
XR of hands and feet    
XR erosion score 89.8 (69.0 to 104.3) 21.0 (6.0 to 35.0) 0.001
XR narrowing 5.0 (57.0 to 108.3) 16.5 (4.5 to 28.0) 0.002
Sacroiliitis (No. %) 3 (27%) 6 (35%) 0.98
Bone densitometry    
T score L1 -4 0.7 (- 0.1 to 4.8) -0.1 (-1.6 to 2.8) 0.13
T score total femur -0.4 (-1.8 to 1.3) -0.3 (-2.1 to 1.3) 0.88
  1. *Median + interquartile range shown
  2. **score per joint; median (range)
  3. AM = arthritis mutilans; DIP = distal interphalangeal; MCP = metacarpophalangeal; MRI = magnetic resonance imaging; non-AM = erosive psoriatic arthritis without bone lysis; PAMRIS = Psoriatic arthritis MRI scoring system; PIP = proximal interphalangeal; PsA = psoriatic arthritis; XR = plain radiography.