|  | Control Subjects (N = 10) | CD Medication Naïve (N=10) | UC Medication Naïve (N=10) | CD On Steroids (N=3) | UC On Steroids (N=2) | 
      
        | Age in years (mean ± SD) | 13.5 ± 3.9 | 13.4 ± 4.5 | 13.9 ± 4.3 | 15 ± 2 | 16 ± 0.0 | 
      
        | Gender M | 3 | 5 | 5 | 2 | 1 | 
      
        | F | 7 | 5 | 5 | 1 | 1 | 
      
        | Height Z score (mean ± SD) | -0.4 ± 0.6 | 0.2 ± 1.5 | -0.4 ± 1.2 | 0.5 ± 1.0 | -0.7 ± 1.8 | 
      
        | BMI Z score (mean ±SD ) | 1.0 ± 0.9 | 0.4  ±    1.3 | -0.6  ±    0.7 * | -1.1 ± 2.3 | -0.2 ± 0.7 | 
      
        | Activity index score | N/A | 37 ± 16 ‡ | 45 ± 17.3 ₠ | 41 ± 1.4 ‡ | 82.5 ± 2.5 ï # | 
      
        | TI disease (%) | N/A | 8 (80%) | 0 (0%) | 3 (100%) | 0 (0%) | 
      
        | SC disease (%) | N/A | 5 (50%) | 3 (30%) | 1 (33%) | 2 (100%) | 
      
        | N: Number; M: Male; F: Female; SD: Standard    Deviation; BMI: Body Mass Index; CD: Crohns Disease; UC: Ulcerative Colitis;    TI: Terminal Ileum; SC: Sigmoid Colon *P value <0.05 when compared to control subjects
 ï P value <0.05 when compared to all other    groups
 ‡ Pediatric Crohns Disease Activity Index    (PCDAI)
 # Pediatric Ulcerative Colitis Activity Index    (PUCAI)
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