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

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