Figure 1From: Development of a triage protocol for patients presenting with gastrointestinal hemorrhage: a prospective cohort studyProbability of complication within 24 hours for patients designated as high risk (presence of red blood by emesis or nasogastric aspirate or hematochezia in emergency department and/or unstable comorbidity) or low risk (neither risk factor), plotted by prevalence of complication in a given patient population. LR, likelihood ratio.Back to article page