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Table 2 Classification of patients according to the Steinbrocker criteria in the BMD <70 % of YAM and BMD ≥70 % of YAM groups

From: Risk of low bone mineral density in patients with rheumatoid arthritis treated with biologics

   BMD <70 % of YAM BMD ≥70 % of YAM
Steinbrocker classification I 23 69
II 10 23
III 21 36
IV 3 1
  1. (p = 0.11)
  2. BMD bone mineral density, YAM young adult mean