Clinical Decision-Making
Glasgow-Blatchford Score: Upper GI Bleeding Triage Guide
The Glasgow-Blatchford Score (GBS) is the best validated tool for identifying low-risk upper GI bleeding (UGIB) patients safe for outpatient management. GBS ≤2 has a negative predictive value of ~98% for the need for endoscopic intervention — roughly 20–25% of UGIB presentations. GBS is the preferred triage score for safe discharge decisions; Rockall is superior for predicting in-hospital mortality.
TL;DR: The Glasgow-Blatchford Score (GBS) is the best validated tool for identifying low-risk upper GI bleeding (UGIB) patients safe for outpatient management. GBS ≤2 has a negative predictive value of ~98% for the need for endoscopic intervention. Use GBS at the door.
The Upper GI Bleeding Challenge
Upper gastrointestinal bleeding accounts for approximately 50–150 hospitalizations per 100,000 adults annually and carries an in-hospital mortality of 3–10%.
Glasgow-Blatchford Score Calculation
| Variable | Value | Points |
|---|---|---|
| Blood Urea (mmol/L) | <6.5 | 0 |
| 6.5–7.9 | 2 | |
| 8.0–9.9 | 3 | |
| 10–24.9 | 4 | |
| ≥25 | 6 | |
| Hemoglobin (g/dL) — Men | ≥13 | 0 |
| 12–12.9 | 1 | |
| 10–11.9 | 3 | |
| <10 | 6 | |
| Hemoglobin (g/dL) — Women | ≥12 | 0 |
| 10–11.9 | 1 | |
| <10 | 6 | |
| Systolic BP (mmHg) | ≥110 | 0 |
| 100–109 | 1 | |
| 90–99 | 2 | |
| <90 | 3 | |
| Pulse ≥100 bpm | — | 1 |
| Melena at presentation | — | 1 |
| Syncope | — | 2 |
| Hepatic disease (history) | — | 2 |
| Cardiac failure (history) | — | 2 |
Score range: 0–23
Score Interpretation and Discharge Thresholds
| GBS | Risk Category | NPV for Intervention | Management |
|---|---|---|---|
| 0 | Very low | 100% | Safe discharge; outpatient scope |
| 1–2 | Low | ~98% | Generally safe discharge with 24h follow-up |
| 3–5 | Intermediate | ~82% | Admit for observation |
| ≥6 | High | — | Admit; urgent endoscopy within 24 hours |
| ≥16 | Very high | — | Resuscitate; emergent endoscopy |
GBS vs Rockall Score
| Feature | GBS | Rockall |
|---|---|---|
| Pre- or post-endoscopy | Pre-endoscopy | Post-endoscopy |
| Best for | Safe discharge identification | Predicting rebleeding and mortality |
| AUC for transfusion | ~0.81 | ~0.68 |
| AUC for mortality | ~0.75 | ~0.81 |
Evidence and Guidelines
Schiefer M et al. (2012) validated GBS in 478 consecutive UGIB patients. AUC 0.879 for need for treatment. NPV 98.1% at GBS ≤2.
Custovic N et al. (2020) compared GBS and Rockall in 237 patients. GBS superior for transfusion prediction; Rockall superior for mortality.
Correia P et al. (2023) confirmed AUC 0.883 for intervention need in 149 ED patients.
References
- Schiefer M, et al. Eur J Gastroenterol Hepatol. 2012;24(4):382–387. PMID: 22228368.
- Custovic N, et al. Med Arch. 2020;74(4):270–274. PMID: 33041443.
- Correia P, et al. Cureus. 2023;15(1):e34205. PMID: 36843719.
- Blatchford O, et al. Lancet. 2000;356(9238):1318–1321. PMID: 11073021.
Related calculators
- Glasgow-Blatchford Score Calculator - Gastroenterology
- Rockall Score Calculator - Gastroenterology