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J Am Acad Child Adolesc Psychiatry. 1996 May;35(5):588-96; discussion 596-8.

Genetic influence on parent-reported attention-related problems in a Norwegian general population twin sample.

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1
National Centre for Child and Adolescent Psychiatry, University of Oslo, Norway.

Abstract

OBJECTIVE:

To assess the genetic and environmental influences on attention problems in a general population twin sample and to investigate whether there are changes in the relative genetic influence on attention problems with increasing severity.

METHOD:

Parental ratings of the Child Behavior Checklist were collected from five Norwegian national cohorts of same-sex twins. The sample comprises 526 identical and 389 fraternal pairs.

RESULTS:

Considerable genetic influence on attention problems was found for both sexes and across age groups (aged 5 to 9 years and 12 to 15 years). A two-parameter model with additive genetic influence and nonshared environment showed a good fit, with heritability ranging from .73 in boys aged 5 to 9 years, to .76 in girls aged 5 to 9 years. There was no change in the relative genetic influence across severity after accounting for the influence of cerebral palsy, epilepsy, and low birth weight.

CONCLUSION:

The results indicate a substantial genetic influence on attention problems across sex, age, and severity.

[Indexed for MEDLINE]

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