Abstract 191
| GORD in at least one twin (pairs) | Concordant affected pairs | Discordant pairs | Casewise concordant | |
|---|---|---|---|---|
| * p = 0.001 versus DZ twins ** p < 0.0001 versus DZ twins | ||||
| MZ | 257 | 71 (28%)* | 186 (72%) | 142/328 (43%)** |
| DZ | 329 | 52 (16%) | 277 (84%) | 104/381 (27%) |
| Total | 586 | 123 | 463 | |