Reduced hemoglobin and increased C-reactive protein are associated with upper gastrointestinal bleeding

Figure 1 Receiver operating characteristic curves of the results of blood examination around the date of endoscopy. Receiver operating characteristic curves were created based on the results of blood examination around the day of endoscopy. The analyzed data were white blood cell count (A), hemoglobin (B), C-reactive protein (C), blood urea nitrogen (D), and creatinine (E), and blood urea nitrogen/creatinine (F). Solid straight line, a line with a slope of 45° to calculate threshold by the software (JMP 8.0.2); broken line, reference line.

Figure 2 Receiver operating characteristic curves of the results of change rate of blood examination. Receiver operating characteristic curves were created based on the rate of change in the results of blood examination. The rate of change rate was calculated as a comparison between around the day of endoscopy and 3 mo prior to the date of endoscopy (see text). The analyzed data were white blood cell count (A), hemoglobin (B), C-reactive protein (C), blood urea nitrogen (D), and creatinine (E). Solid straight line, a line with a slope of 45° to calculate threshold by the software (JMP 8.0.2); broken line, reference line.