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Table 5 Sites of NBF and other features of gout on CT.

From: Characterization of new bone formation in gout: a quantitative site-by-site analysis using plain radiography and computed tomography

  Distal interphalangeal joints Proximal interphalangeal jointsa Metacarpophalangeal joints Carpal region Radius and ulna
Spur 12.5 (21.1) 20.0 (22.7) 18.0 (25.5) 16.3 (26.6) 24.8 (32.9)
Osteophyte 23.1 (25.1) 41.0 (23.2) 24.5 (24.2) 33.1 (32.3) 27.5 (30.2)
Periosteal NBF 1.9 (6.1)*** 6.0 (10.5)* 2.5 (5.5)** 9.4 (16.1) 16.3 (23.3)
Ankylosis 0.0 (0.03) 1.5 (3.7) 0.0 (0.0) 0.6 (2.8) 0.0 (0.0)
Sclerosis 18.1 (23.5)** 35.0 (25.2) 23.5 (25.8)* 30.6 (28.8) 41.3 (33.7)
Erosion 20.9 (22.6)* 35.8 (26.4) 26.5 (29.8) 29.4 (31.5) 41.3 (40.8)
Tophus 21.4 (26.7)* 39.3 (31.2) 34.0 (36.6) 29.4 (32.5) 41.3 (43.9)
  1. aIncludes IP joint of the thumb. *P < 0.05 compared with radius/ulna, **P < 0.01 compared with radius/ulna, ***P < 0.001 compared with radius/ulna. All P refer to Tukey's post hoc test. Data are expressed as a mean (standard deviation) percentage of sites per patient to account for the different number of joints at each site. CT, computed tomography; NBF, new bone formation.