Low circulating levels of gastrin-17 in patients with Barrett's esophagus

Figure 1 Fasting (A) and postprandial (B) serum G-17 levels in patients with or without long-segment BE in the whole study population. A box plot presentation. The boxes show the central 50% of the cases. The length of the box shows the range within which the center 50% of the values fell. The whiskers show the range of values that fall within 1.5 difference of the values of median from the two hinges of the box. Differences: a: P<0.001; b: P=0.038; non-parametric test (MannWhitney U). To make the figure clear, the very most extreme outliers are not shown in the pictures.