Fig. 4

Biological variability of serum gastrin concentrations in dogs with CE that did not receive gastric acid-suppressive therapy. Serum gastrin concentrations ranged from 9.9–38.5 ng/L (mean: 13.5 ng/L) in 32 dogs with CE not receiving an acid-suppressant. A total of 44 measurements (60%) were at or below the detection limit of the gastrin assay and 4 (6%) were above URL. Closed circles: mean serum gastrin concentrations, horizontal bars: range of serum gastrin concentrations in individual dogs; gray shaded area (delineated by dashed vertical lines): RI (left dashed vertical line: lower reference limit coinciding with the lower detection limit of the assay