Ratios of observed over expected comorbid associations among various forms of GORD
| Condition | Oesophagitis | Oesophageal ulcer | Oesophageal stricture | Strictured hiatus hernia | Hiatus hernia | Pyrosis |
| Oesophagitis | ||||||
| Oesophageal ulcer | 12.96 | |||||
| Oesophageal stricture | 9.86 | 21.85 | ||||
| Strictured hiatus hernia | 9.19 | 10.09 | 18.68 | |||
| Hiatus hernia | 9.41 | 9.11 | 7.34 | 10.21 | ||
| Pyrosis | 7.20 | 3.63 | 3.13 | 5.26 | 5.74 |