Travis Criteria Calculator (Acute Severe Ulcerative Colitis)

Learn the Oxford Travis criteria for acute severe ulcerative colitis: day-3 stool frequency and CRP (mg/L) during IV corticosteroids, high-risk definition, clinical use, and limitations.

Travis criteria (acute severe ulcerative colitis)

Day 3 of intravenous corticosteroids — stool frequency per 24 hours and C-reactive protein (CRP).

Stool frequency (bowel movements per 24 h, day 3)

CRP (mg/L, day 3)

Disclaimer: The Travis index is a prognostic aid from cohort studies and does not replace clinical judgment, serial examination, or institutional ASUC protocols. Biologic-era outcomes differ from historical colectomy rates; use alongside Lichtiger criteria, endoscopy, and specialist input.

Travis criteria (Oxford index, day 3)

Definition

On day 3 of hospital treatment with intravenous corticosteroids for acute severe ulcerative colitis, the original Travis (Oxford) rule flags high risk of poor short-term outcome (historically high colectomy rate during the admission) if either:

Stool frequency is greater than 8 bowel movements per 24 hours, or
Stool frequency is 3 to 8 per 24 hours and serum CRP is greater than 45 mg/L.

High risk = (stools > 8) ∨ ((stools ≥ 3 ∧ stools ≤ 8) ∧ (CRP > 45 mg/L))

CRP should be reported in mg/L (not mg/dL). Typical assays in mg/L use cutoffs in this range; if your lab reports mg/dL, convert before applying the 45 threshold.

Context and limitations

Developed to predict need for colectomy during the index admission in the pre-biologic era.
Modern ASUC care often incorporates early rescue medical therapy; absolute colectomy risk for "high-risk" Travis patterns is lower than in the original cohorts but the rule remains widely cited for timing escalation discussions.
Complement with clinical scores (e.g. Lichtiger), fecal calprotectin, endoscopic severity, and response trajectory rather than a single time point in isolation.

Reference

Travis SPL et al. Predicting outcome in severe ulcerative colitis. Gut. 1996;38(6):905–910. (Oxford cohort; day 3 stool count and CRP.)

What the Travis criteria are

The Travis criteria (often called the Oxford index) are a simple, bedside-oriented rule used in acute severe ulcerative colitis (ASUC) to stratify prognosis around day 3 of intravenous corticosteroid therapy. They combine two readily available measures—stool frequency over 24 hours and serum C-reactive protein (CRP)—to flag patients whose early clinical and inflammatory trajectory suggests a higher likelihood of failing medical therapy in the short term.

The criteria were developed from cohort experience in severe colitis and were originally emphasized for identifying patients at high risk of needing colectomy during the same hospital admission. In contemporary inflammatory bowel disease (IBD) practice, the same signals are frequently used to trigger earlier discussion of rescue medical therapy, more intensive monitoring, and coordinated surgical planning when indicated, rather than as an isolated binary decision rule.

When they apply clinically

ASUC is a gastroenterologic emergency. Patients typically have frequent bloody bowel movements, systemic signs of inflammation, and often meet criteria for hospitalization and IV corticosteroids based on composite clinical severity scores (for example, Truelove and Witts–type definitions, Lichtiger stool frequency and bleeding assessments, and supportive laboratory abnormalities such as anemia or elevated inflammatory markers).

The Travis index is anchored to a specific time window: assessments are interpreted in the context of day 3 of IV steroid treatment. Day 1 and day 2 values can be informative for trajectory, but the published rule emphasizes the day-3 stool count and CRP because that timing balances early enough detection of non-response with sufficient time for steroids to exert an initial effect in many responders.

The rule: how “high risk” is defined

Using values obtained on day 3 of IV corticosteroids, a patient meets the classic Travis high-risk pattern if either of the following is true:

Stool frequency > 8 bowel movements per 24 hours, or
Stool frequency from 3 to 8 per 24 hours and CRP > 45 mg/L.

If neither condition is met, the patient does not satisfy the classic high-risk definition. This “negative” classification is often associated with a higher chance of responding to continued steroid therapy, but it does not guarantee success; patients can still deteriorate, develop complications, or require escalation later in the admission.

Practical notes on the inputs

Stool frequency

Stool counts should reflect a full 24-hour period and be recorded in a consistent way across nursing shifts (including overnight). In research settings, stool frequency is often collected prospectively; in routine care, variability in counting methodology can affect the precision of the threshold. When counts are borderline, clinicians typically weigh the overall trajectory (whether frequency is rising, stable, or falling), bleeding volume, hemodynamic status, and pain.

CRP

CRP should be interpreted in mg/L for the 45 mg/L cutoff used by the original description. Laboratory reporting units differ internationally; if your institution reports CRP in another unit, convert before applying the threshold. CRP is a nonspecific acute-phase reactant and can be influenced by infection, extensive mucosal ulceration, and other inflammatory processes; correlation with clinical picture, imaging when indicated, and microbiologic evaluation helps avoid misattribution.

What “high risk” means in modern IBD care

Historically, meeting Travis high-risk criteria was linked to a substantial risk of colectomy during the index hospitalization in reported cohorts. With widespread use of anti–tumor necrosis factor rescue therapy and other advanced options, the absolute probability of surgery for a given patient profile has changed relative to older eras. Many centers therefore treat a positive Travis pattern as a prompt for multidisciplinary reassessment rather than as a deterministic label.

Typical considerations after a high-risk Travis pattern include:

Confirming that the patient is receiving adequate IV steroid dosing and that there are no confounding factors (infection, medication non-adherence, incorrect diagnosis).
Repeating objective markers of severity and organ dysfunction as clinically appropriate.
Discussing timing and eligibility for rescue medical therapy according to local pathways, comorbidities, infection risk, and surgical candidacy.
Engaging gastroenterology and, when relevant, colorectal surgery early enough to preserve optionality if rapid escalation is needed.

How this calculator implements the rule

This tool applies the published logical structure directly: it classifies the entered day-3 stool frequency and day-3 CRP (mg/L) against the thresholds above. It does not model additional predictors (such as albumin, fecal calprotectin dynamics, or endoscopic severity), and it does not replace serial clinical assessment.

Limitations every clinician should keep in mind

Single time point: A rule centered on day 3 may miss patients who deteriorate shortly afterward or who improve transiently and then rebound.
Population drift: Outcomes after high-risk classification differ by era, biologic exposure, center volume, and surgical thresholds.
Comorbidity and infection: CRP elevations may reflect complications that change management priorities independent of colitis activity alone.
Endoscopy and objective colonic inflammation: Many pathways incorporate flexible sigmoidoscopy findings and other severity indices; these are not part of the Travis definition but often influence escalation decisions.
Pediatric and special populations: Validation context, dosing, and typical disease behavior may differ; apply criteria with specialty input when standard adult ASUC assumptions do not fit.

Medical disclaimer

This article and calculator are intended for professional education and clinical decision support awareness only. They do not establish a standard of care, do not replace specialist judgment, and should not be used as the sole basis for treatment decisions. Management of acute severe ulcerative colitis should follow institutional protocols and involve appropriate gastroenterology and surgical consultation.