Skip Navigation LinksHome > August 2007 - Volume 17 - Issue 4 > Case–control and within-family tests for association between...
Text sizing:
A
A
A
Psychiatric Genetics:
doi: 10.1097/YPG.0b013e32809913c8
Original Articles

Case–control and within-family tests for association between 5HTTLPR and conduct problems in a longitudinal adolescent sample

Sakai, Joseph T.a; Lessem, Jeff M.b; Haberstick, Brett C.b; Hopfer, Christian J.a; Smolen, Andrewb; Ehringer, Marissa A.b; Timberlake, Davidb c; Hewitt, John K.b

Collapse Box

Abstract

Background: Several recent studies have reported an association between the serotonin transporter 5HTTLPR (s-allele) and aggression; however, nonreplications have also been reported. Inconsistencies may be explained by gene–environment interactions. Using a large general population sample, we sought to test for an association between 5HTTLPR and conduct problems, and to explore for a possible 5HTTLPR by maltreatment interaction.

Methods: Using Caucasian adolescents from the genetic-pairs sample of the National Longitudinal Study of Adolescent Health (n=1736), we tested for an association between 5HTTLPR and both a categorical and, separately, a continuous measure of conduct problems using regression analyses while controlling for sex, family effects, and age. We then tested for an association between 5HTTLPR and conduct problems using the within-family test Quantitative Transmission Disequilibrium Test. Analyses were repeated for a measure of adolescence-limited delinquency.

Results: Results did not support an association between 5HTTLPR and conduct problems or delinquency. The Quantitative Transmission Disequilibrium Test analyses, which account for population stratification, were nonsignificant (F=0.17; P=0.68); introducing maltreatment as a covariate into the model did not affect this association (F=0.17; P=0.68). No association was seen between 5HTTLPR and a measure of adolescence-limited delinquency (F=0.54; P=0.46).

Discussion: Using two methods in a large general population sample we did not find a significant association between 5HTTLPR and conduct problems. A gene by maltreatment interaction was not supported.

© 2007 Lippincott Williams & Wilkins, Inc.

Login

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.