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Table 3 Potential predictive variables for renal involvement at one year or gastrointestinal complications (using logistic regression)

From: A randomized, placebo-controlled trial of prednisone in early Henoch Schönlein Purpura [ISRCTN85109383]

  Predictor Renal involvement at one year Gastrointestinal complication
   β-coefficient P-value β-coefficient P-value
Univariate (predictor alone)      
  Age -0.06 0.4 0 1.0
  Time since diagnosis 0 1.0 -0.02 0.6
  Factor XIII level -0.2 0.6 -0.2 0.4
  IgA level 0.09 0.5 0.01 0.9
Bivariate (predictor and treatment group)      
  Age -0.09 0.2 0.1 0.8
  Time since diagnosis 0.01 0.8 -0.3 0.5
  Factor XIII level -0.3 0.4 -0.1 0.6
  IgA level 0.04 0.8 0.1 0.3