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. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: JAMA Psychiatry. 2015 Mar 1;72(3):211–218. doi: 10.1001/jamapsychiatry.2014.2138

Table 1.

Descriptive Statistics for Adopted Children and Biological and Adoptive Relatives

Characteristic Study Sample, %
Parents Biological Siblings Adoptive
Biological Adoptive Full Half Siblings Child
No. of adopted children with at least 1 of this type of relative 18115 18115 3524 14884 8597 18115
No. of relatives with information 27241 36230 7301 43537 14978
Adoptive child’s sex (male)   52.2
Drug abuse     5.8     1       6.3     5.4     3.4
Hospitalization owing to psychiatric disease   18.8     3.1     19   20.8     8.4
Alcohol use disorder   16.2     3.3     19.3   23.6     8.1     9.4
Criminal conviction   41.3     9.4     61.3   62.8   36.8
Mean maternal age, y   24.4   37.5
Maternal divorce   38.7     6.8
Education
 High (≥75th percentile)   23.5   57.2
 Low (<75th percentile)   76.5   42.8