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. 1996 May;35(5):588-96; discussion 596-8.
doi: 10.1097/00004583-199605000-00013.

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

H Gjone  1 , J Stevenson, J M Sundet
Affiliations

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

H Gjone et al. J Am Acad Child Adolesc Psychiatry. 1996 May.

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.

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