Figure 27-2 Gastric emptying time (mean ± SD) of a solid test meal in three groups of patients: diabetics (line 1), diabetics given metoclopramide (10 mg intravenously) 1.5 hours before the test meal (line 2), and nondiabetics (line 3). (From Wright RA, Clemente R, Wathen R: Diabetic gastroparesis: An abnormality of gastric emptying of solids. Am J Med Sci 289:240, 1985.)