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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Am J Med Genet B Neuropsychiatr Genet. 2015 Sep 3;171(7):948–957. doi: 10.1002/ajmg.b.32375

Table 1a –

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

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.