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Table 2 Site-by-site plain radiography analysis.

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

   Erosion present, number Erosion absent, number OR (95%CI) P Erosion score, in eroded joints, mean (SD) P JSN present, number JSN absent, number OR (95%CI) P JSN score, in narrowed joints, mean (SD) P
Spur Present 73 3 64.9 <0.0001 4.2 (1.2) <0.0001 55 14 28.7 <0.0001 2.6 (1.2) <0.0001
  Absent 197 525 (20.2-208.5)   2.2 (1.3)   58 431 (15.0-54.8)   1.8 (0.9)  
Osteophyte Present 139 28 19.0 <0.0001 3.2 (1.5) <0.0001 75 58 13.2 <0.0001 2.2 (1.1) 0.65
  Absent 131 500 (12.1-29.7)   2.3 (1.4)   38 387 (8.2-21.2)   2.3 (1.2)  
Periosteal NBF Present 50 1 119.8 <0.0001 3.9 (1.4) <0.0001 29 7 21.6 <0.0001 2.5 (1.1) 0.08
  Absent 220 527 (16.4-872.9)   2.5 (1.5)   84 438 (9.2-51.0)   2.1 (1.1)  
Ankylosis Present 7 0 30.1 0.0005 5.0 (0.0) <0.0001 5 0 45.2 0.0003 4.0 (0.0) <0.0001
  Absent 263 528 (1.7-529.)   2.7 (1.5)   108 445 (2.5-823.6)   2.1 (1.1)  
Sclerosis Present 194 13 101.1 <0.0001 3.2 (1.5) <0.0001 91 62 25.6 <0.0001 2.4 (1.1) <0.0001
  Absent 76 515 (54.9-186.3)   1.5 (0.7)   22 383 (14.9-43.7)   1.4 (0.7)  
  1. Relationship of new bone formation (NBF) with erosion and joint space narrowing (JSN) (n = 798 joints for erosion and 558 joints for JSN). CI, confidence interval; OR, odds ratio; SD, standard deviation.