A decades-old scoring system for ulcerative colitis may be leaving high-risk patients behind — and a simple lab value tweak could fix that. The Truelove and Witts Criteria (TWC), the 70-year-old gold standard for classifying acute severe UC, may be missing a significant subset of hospitalized patients who go on to need surgery. A new retrospective study out of Australia found that patients who didn't meet TWC still faced a comparable 1-year colectomy risk to those who did.

The fix? Lowering the C-reactive protein (CRP) threshold from >30 mg/L to ≥12 mg/L. Researchers analyzed 503 hospital admissions for acute UC between 2015 and 2024, and found that this adjusted cutoff reclassified 26% of "non-severe" patients into the high-risk category — and captured 43% of those who ultimately required colectomy within a year.

Key Takeaways:

• Colectomy rates at 30 days, 90 days, and 1 year did not differ significantly between patients who met TWC and those who didn't
• The ≥12 mg/L CRP threshold is most useful in biologic-naïve patients; it may not improve risk stratification in those already on biologic therapy
• Authors recommend intensive inpatient management for UC patients with stool frequency ≥6/day and CRP ≥12 mg/L, especially those with pancolitis or Mayo 3 endoscopic disease

Why it matters: This evidence-based modification to a long-standing clinical tool offers an immediately actionable way to better identify UC patients at risk of colectomy — potentially enabling earlier, more aggressive intervention before it's too late.