Table 3.

Robarts histopathology index

Histopathological variable	Grade
Chronic inflammatory infiltrate	0 = No increase; 1 = Mild but unequivocal increase; 2 = Moderate increase; 3 = Marked increase
Lamina propria neutrophils	0 = None; 1 = Mild but unequivocal increase; 2 = Moderate increase; 3 = Marked increase
Neutrophils in epithelium	0 = None; 1 = 50% crypts involved
Erosion or ulceration	0 = No erosion, ulceration or granulation tissue; 1 = Recovering epithelium + adjacent inflammation; 2 = Probable erosion-focally stripped; 3 = Unequivocal erosion; 4 = Ulcer or granulation tissue