Studied groups Histopathological grading       P -value
  Grade 0 Grade 1 Grade 2 Grade 3 Grade 4 Grade 5  
Mild-moderate  UC Group I (n=27) 5 12 6 4 0 0 0.02*
Severe UC Group II (n=23) 0 0 2 11 6 4
P<0.05 *significant; UC, ulcerative colitis.
Table 2: Correlation between histological grading and endoscopic severity in the UC patients.