Ulcerative Colitis Mayo Score/Disease Activity IndexReference point score on equation cardLoading...Stool frequencyNormal01-2 stools/day more than normal+13-4 stools/day more than normal+2> 4 stools/day more than normal+3Rectal bleedingNone0Visible blood with stool less than half the time+1Visible blood with stool half of the time or more+2Passing blood alone along with greater than half stools per day with blood+3Mucosal appearance at endoscopyNormal or inactive disease0Mild disease - erythema, decreased vascular pattern, mild friability+1Moderate disease - marked erythema, absent vascular pattern, friability, erosions+2Severe disease - spontaneous bleeding, ulceration+3Physician rating of disease activityNormal0Mild+1Moderate+2Severe+3