| Baseline | After surgery | Change (%) | p-value | |
| Acid reflux | 47.0 (5.9) | 1.8 (0.5) | −96.1 | <0.005 |
| Weakly acidic reflux | 25.0 (9.7) | 2.3 (0.9) | −90.8 | <0.02 |
| Liquid reflux | 24.8 (9.8) | 1.7 (0.9) | −93.1 | <0.005 |
| Mixed reflux | 47.9 (5.1) | 2.4 (1.1) | −94.9 | <0.005 |
| Gas reflux | 24.2 (4.9) | 11.3 (3.0) | −53.3 | <0.05 |
| Proximal reflux | 16.4 (4.4) | 0.1 (0.1) | −99.4 | <0.01 |
| Distal reflux | 11.5 (1.5) | 2.4 (0.7) | −79.1 | <0.01 |
All values represent the mean (SEM) per 24 h period.