| 
      
        | Group | Mean±SD | p value |  
        | Control | 46.96±19.27 | -- |  
        | Acetic acid induced colitis | 26.03±8.49 | 0.016a |  
        | NAC treated colitis | 39.74±12.50 | 0.788 |  
        | Ginger treated colitis | 54.17±10.30 | 0.739 |  
        | NAC and ginger treated colitis | 67.86±6.09 | 0.160 |  | 
  
    | a = statistically significant compared to control (p< 0.05). | 
  
    | Table 4: Mean values, standard deviation and significance of PCNA proliferation
index per field in different groups. |