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Table 1 Features of new bone formation (NBF) in patients with gout.

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

  Number of joints with XR NBF features (number = 798 joints) Mean (SD) number of joints with XR NBF features (number = 20 patients) Number of joints with CT NBF features (number = 798 joints) Mean (SD) number of joints with CT NBF features (number = 20 patients)
Spur 76 (9.5%) 3.8 (5.7) 141 (17.6%) 7.1 (7.9)
Osteophyte 167 (20.9%) 8.4 (6.5) 243 (30.5%) 12.2 (7.7)
Periosteal NBF 51 (6.4%) 2.6 (3.4) 48 (6.0%) 2.4 (3.4)
Ankylosis 7 (0.9%) 0.35 (1.1) 5 (0.6%) 0.25 (3.4)
Sclerosis 207 (25.9%) 10.4 (8.9) 228 (28.6%) 11.4 (8.3)
  1. CT, computed tomography; SD, standard deviation; XR, plain radiography.