Fig. 1From: Selected nasogastric lavage in patients with nonvariceal upper gastrointestinal bleedingThe receiver operating characteristic curves of Glasgow–Blatchford score, BUN/Cr ratio > 30, and nasogastric lavage for predicting the presence of a bleeding focus on endoscopy. AUROC, area under the receiver operating characteristic curve; BUN/Cr, ratio of serum blood urea nitrogen to creatinine > 30 versus ≤ 30; GBS, Glasgow–Blatchford scoreBack to article page