| Frequency of reflux | BMI <25 Controls/cases | BMI 25–24.9 Controls/cases | BMI ⩾30 Controls/cases | |
| OR† (95% CI) | OR (95% CI) | OR (95% CI) | ||
| Adenocarcinoma oesophagus | ||||
| Never | 1.0 (ref) | 1.6 (0.9 to 2.8) | 2.2 (1.1 to 4.3) | |
| <Weekly | 1.4 (0.8 to 2.7) | 1.8 (1.1 to 3.2) | 3.9 (2.2 to 7.0) | |
| ⩾Weekly | 5.6 (2.8 to 11.3) | 7.4 (4.1 to 13.5) | 16.5 (8.9 to 30.6) |