Modified Helicobacter test using a new test meal and a 13C-urea breath test in Helicobacter pylori positive and negative dyspepsia patients on proton pump inhibitors

Figure 1 Flow diagram. The patient population and results of Helicobacter pylori diagnosis (based on study criteria and UBT with standard test meal and new test meal after 29 d of PPI treatment). UBT: Urea breath test; ITT: Intention-to-treat; PPI: Proton pump inhibitors; Hp: Helicobacter pylori.

Figure 2 Empirical receiver operating characteristic curve by using cut-off values of 2. 0‰, 2.5‰ and 3.0‰ (Per-protocol population, n = 102).