Small intestinal motility index in the different study groups before and during intraduodenal nutrient infusion
| Controls | Functional dyspepsia | Billroth I gastrectomy | |
| Before infusion | 6.66 (0.1) | 5.95 (0.4) | 6.34 (0.3) |
| During infusion | 6.75 (0.2) | 6.02 (0.3) | 6.51 (0.4) |
Results are expressed as mean (SEM) values across all recording sites.