Regarding upper GI bleed-true statement is
Ref. Sabiston Textbook of Surgery. Pg. 1142
 
GI Bleeding
Most common cause of GI Bleed is Non variceal bleeding (80%)

Upper GI bleed is defined bleeding arising from esophagus ,stomach ,or duodenum .
Rockall and Baylor scoring for predicatabilty of rebleeding and mortality
1st line management includes IV Fluids + blood (1:3) + PPI Infusion + upper GI endoscopy .
Most common cause is variceal bleeding
It is bleeding up to ampulla of Vater
MC management is endoscopic banding
Rockall scoring is used for risk stratification