Concordance rates for gastro-oesophageal reflux disease in monozygotic and dizygotic twins
| Twin type | Total pairs | Discordant pairs | Concordant pairs | Pairwise concordance rate* | Casewise concordance rate* |
|---|---|---|---|---|---|
| *95% confidence intervals in parentheses. | |||||
| Monozygotic | 928 | 190 | 70 | 27 (22–32)% | 42 (36–49)% |
| Dizygotic | 1032 | 279 | 50 | 15 (11–19)% | 26 (21–32)% |