Indices predictive of failure of corticosteroid therapy for ASUC
| Assessment at day 3 of corticosteroids | Chance of treatment failure* | Reference | ||
| BO >8/day or BO 3–8/day and CRP >45 mg/L | 85% | Travis et al 1281 | ||
| Mean stool frequency day 1–3 | Total: | Ho et al 1282 | ||
| <4 | 0 | |||
| 4–6 | 1 | 0–1 | 11% | |
| 7–9 | 2 | 2–3 | 45% | |
| >9 | 4 | ≥4 | 85% | |
| Transverse colonic dilatation on abdominal X-ray ≥5.5 cm | 4 | |||
| Albumin on admission <30 g/L | 1 | |||
| Number of stools in 24 hours + (0.14×CRP (mg/L)) >8 | 72% | Lindgren et al 1283 | ||
| CRP/albumin ratio >0.85 combined plus stool frequency >3 | 74% | Gibson et al 223 | ||
*Variably defined as failure of steroid therapy or risk of inpatient colectomy.