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Table 2 Comparison of plantar plate pathology between control subjects (n = 10) and patients with RA (n = 41)

From: Plantar plate pathology is associated with erosive disease in the painful forefoot of patients with rheumatoid arthritis

Pathology at the MTP joint level

Controls (n = 10) Joints (n = 40)

Patients (n = 41) Joints (n = 163a)

PP present:

 % patients with all 4 (n)

100.0 (10/10)

82.9% (34/41)

 % joints (n)

100.0% (40/40)

80.4% (131/163)

Tear present:

 % patients (n)

20.0% (2/10)

67.5% (27/40)

 % joints (n)

100.0% (40/40)

80.4% (131/163)

Tear width:

 medial % (n)

19.1% (25/131)

 central % (n)

5.0% (2/40)

6.9% (9/131)

 lateral % (n)

1.5% (2/131)

 full width % (n)

2.3% (3/131)

 medial/central % (n)

2.3% (3/131)

 central/lateral % (n)

1.5% (2/131)

Tear length:

 proximal % (n)

95.0% (38/40)

66.4% (8/131)

 central % (n)

3.8% (5/131)

 distal % (n)

5.0% (2/40)

29.8 (39/131)

Plantar plate pathology present:

 % patients (n)

20.0% (2/10)

85.4% (35/41)

 % joints (n)

5.0% (2/40)

46.6% (76/163)

  1. aMRI data missing for 5th MTP joint in one patient with RA. PP plantar plate