| Study name | Time of presentation from surgery | Clinical presentation | Method of investigation | Management | BMI post management | Diagram reported |
| Baltasar et al., 2006 [15] (Spain) | After 18 months | Weight gain | Upper gastrointestinal series | Duodenal switch (DS) | 33 kg/m2 | Yes |
| Baltasar et al., 2006 [15] (Spain) | After 9 months | Weight gain | Upper gastrointestinal series | Duodenal switch (DS) | 27.6 kg/m2 | Yes |
| Al Khalifa et al., 2014 (Bahrain) | After 13 months | Significant degree of reflux with excessive vomiting | Upper gastrointestinal series | Pouch excision | 31.1 kg/m2 | Yes |
| Al Khalifa et al., 2014 (Bahrain) | After 45 days | Significant degree of reflux with excessive vomiting | Upper gastrointestinal series | Pouch excision | 33 kg/m2 | Yes |