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Chunk #10 — Overview of the early growth and development study — Sample description

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The early growth and development study: using the prospective adoption design to examine genotype-environment interplay. 2008.
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The EGDS sample includes 360 adoptive triads: 360 adopted children, 360 sets of adoptive parents, 359 birth mothers, and 114 birth fathers. The mean age of the adoption placement was 3 days (SD = 5 days). The adopted children's birth dates ranged from January 2003 to January 2006. Forty-three percent of the children were female. Demographic information regarding parent age, race, education, income, and the number of individuals living in the home at the time of the adoption placement is provided in Table 1. The adoptive parents had been married an average of 11.8 years (SD = 5.1 years), and 51% of the adoptive families had at least one additional child in the home at the time of the writing of this report (Mdn age of additional children = 5.6 years, range = newborn–20 years).