Table 3 Truncated Mayo scores

Rectal bleeding scale

 0. No blood seen

 1. Streaks of blood with stool less than half of the time

 2. Obvious blood with stool most of the time

 3. Blood alone passed

Stool frequency scale

 0. Normal stool frequency per day

 1. 1–2 stools greater than normal per day

 2. 3–4 stools greater than normal per day

 3. ≥5 stools greater than normal per day