Co-existence of IBS, gastro-oesophageal reflux symptoms and BHR
| Observed prevalence (95% CI) | Expected prevalence (95% CI) | |
| Male | 1.65% (1.57–1.73) | 0.41% (0.39–0.43) |
| Female | 3.20% (3.05–3.35) | 0.94% (0.90–0.98) |
| Total | 2.49% (2.41–2.57) | 0.68% (0.66–0.71) |
CI, confidence interval.