Oakland Score for Acute Lower Gastrointestinal Bleeding Calculator

1. Overview & Clinical Utility

The Oakland Score was derived and externally validated by Kathryn Oakland, Vipul Jairath, and colleagues (Lancet Gastroenterol Hepatol 2017;2(9):635-645) using the prospective National Comparative Audit of Lower Gastrointestinal Bleeding across 143 UK hospitals.

Key Clinical Highlights & Guideline Recommendations:

Filling a Critical Triage Void: While validated risk tools exist for upper GI bleeding (e.g., Glasgow-Blatchford), the Oakland score was specifically designed to predict Safe Discharge after acute lower gastrointestinal bleeding (LGIB), outperforming Blatchford, Rockall, AIMS65, BLEED, Strate, and NOBLADS scores (C-statistic 0.79 – 0.84);
British Society of Gastroenterology (BSG) Endorsement: Standardized in international guidelines as the primary decision tool—a score of ≤ 8 points predicts a ≥ 95% probability of safe discharge, identifying low-risk patients who can safely avoid hospital admission and proceed with outpatient colorectal investigation;
Composite Safe Discharge Definition: Defined as the absence of all adverse events: no rebleeding, no RBC transfusion, no therapeutic intervention (endoscopic, radiological, surgical), no 28-day readmission with further bleeding, and no in-hospital death.

2. Oakland Scoring Matrix (0–35 Points Total)

Clinical Variable	Subgroup / Threshold	Points
1. Age (years)	• • •	2 pts 1 pt 0 pts
2. Sex	• Male • Female	1 pt 0 pts
3. Previous LGIB Admission	• Yes • No	1 pt 0 pts
4. Digital Rectal Exam (DRE)	• Blood present • No blood	1 pt 0 pts
5. Heart Rate (bpm)	• • • •	3 pts 2 pts 1 pt 0 pts
6. Systolic Blood Pressure (mmHg)	• • • • •	5 pts 4 pts 3 pts 2 pts 0 pts
7. Haemoglobin Concentration	• () • () • () • () • () • ()	22 pts 17 pts 13 pts 8 pts 4 pts 0 pts

3. Predicted Probability of Safe Discharge by Total Score

Total Oakland Score	Probability of Safe Discharge (%)	Clinical Stratification & Action Protocol
0 – 2 pts	99%	Very Low Risk: Safe for immediate outpatient discharge; schedule elective colonoscopy.
3 – 4 pts	98%	Very Low Risk: High confidence in outpatient safety.
5 pts	97%	Low Risk: Outpatient evaluation indicated.
6 – 7 pts	96%	Low Risk: Outpatient evaluation indicated.
8 pts	95%	BSG Guideline Cut-off (Score ): chance of safe discharge. Outpatient investigation recommended if socially safe.
9 – 10 pts	91% – 93%	Intermediate Risk: Exercise caution; inpatient observation may be warranted.
11 – 13 pts	87% – 89%	Intermediate-High Risk: Inpatient admission recommended for monitoring.
14 – 17 pts	67% – 81%	High Risk: Elevated need for blood transfusion or endoscopic haemostasis. Hospital admission mandatory.
18 – 20 pts	50% – 62%	Very High Risk: Adverse event rate ~50%; intense hemodynamic monitoring and urgent endoscopy prep.
21 – 29 pts	11% – 45%	Severe Active Hemorrhage: Severe anemia/shock; emergency resuscitation and interventional/surgical backup.
≥ 30 pts	< 10%	Critical Massive Lower GI Bleeding: Safe discharge ; ICU level care and emergent haemostatic intervention!

Oakland Score for Safe Discharge in Acute Lower GI Bleeding

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