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Table 3 Multiple regression models showing variables associated with the BASDAI, BASFI and BAS-G at baseline

From: Association of cytokine and matrix metalloproteinase profiles with disease activity and function in ankylosing spondylitis

  Response variablea
Independent variable Regression coefficient (SE) Pvalue
Model 1 BASDAI  
   Female 0.302 (0.119) 0.012
   MMP-8 (pg/ml) 6.667 × 10-6 (2.533 × 10-6) 0.009
   CRP (mg/l) 0.005 (0.003) 0.054
Model 2 BASFI  
   Age 0.012 (0.004) 0.002
   CRP (mg/dl) 0.011 (0.003) 0.001
Model 3 BAS-G  
   Female 0.314 (0.131) 0.018
   MMP-8 (pg/ml) 6.548 × 10-6 (2.786 × 10-6) 0.020
  1. CRP, C-reactive protein; MMP, matrix metalloproteinase; SE, standard error. aFor each regression model, square root transformation of the response variable - Bath ankylosing spondylitis disease activity index (BASDAI), Bath ankylosing spondylitis functional index (BASFI) or Bath ankylosing spondylitis global health (BAS-G) - was carried out to achieve a normal distribution of the data.