Table 1.
| a – Number of individual twins per age for the mixture trajectory analyses | ||||||
|---|---|---|---|---|---|---|
| Age | ||||||
| Zygosity | 7 | 10 | 12 | 14 | 16 | 18 |
| MZM | 2258 | 2211 | 2067 | 366 | 484 | 450 |
| DZM | 2152 | 2098 | 1863 | 329 | 354 | 372 |
| MZF | 2586 | 2619 | 2373 | 663 | 778 | 865 |
| DZF | 2054 | 1989 | 1787 | 438 | 509 | 553 |
| DZO | 4282 | 4238 | 3698 | 776 | 884 | 861 |
| b - Number of twin pairs (% complete pairs) by age in the genetic analyses | ||||||
|---|---|---|---|---|---|---|
| Age | ||||||
| Zygosity | 7 | 10 | 12 | 14 | 16 | 18 |
| MZM | 1510 (99) | 1333 (99) | 1147 (98) | 519 (82) | 647 (81) | 468 (78) |
| DZM | 1595 (99) | 1281 (99) | 1043 (99) | 497 (76) | 512 (77) | 403 (71) |
| MZF | 1721 (99) | 1556 (99) | 1292 (99) | 796 (85) | 880 (83) | 838 (78) |
| DZF | 1461 (99) | 1226 (99) | 1005 (99) | 642 (83) | 671 (75) | 552 (72) |
| DZO | 2992 (99) | 2620 (99) | 2075 (99) | 1196 (71) | 1289 (69) | 957 (65) |
Participants with measurements on at least two occasions between age 7–12 or between age 14–18 were selected for the mixture trajectory analyses. MZM(F) = Monozygotic Male (Female) twin; DZM(F) = Dizygotic Male (Female) twin; DZO = Dizygotic opposite sex twin.
MZM(F) = Monozygotic Male (Female) twin pair; DZM(F) = Dizygotic Male (Female) twin pair; DZO = Dizygotic opposite sex twin pair.