Mortality rates of upper gastrointestinal bleeding due to peptic ulcer (according Dudnick):
A. Overall mortality : 10-15%
B. Patients over 80 years old : 25-30%
C. Patients with systolic blood pressure below 80mmHg at the hospital : 30-35%
D. Bright red blood in the nasogastric tube : 18-20%
E. B, C, D are true.