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The Family History Method in Disordered Gambling Research: A Comparison of Reports Obtained from Discordant Twin Pairs

Published online by Cambridge University Press:  21 February 2012

Wendy S. Slutske ,
Thomas M. Piasecki ,
Jarrod M. Ellingson  and
Nicholas G. Martin
Wendy S. Slutske*
Affiliation:
University of Missouri, United States of America. [email protected]
Thomas M. Piasecki
Affiliation:
University of Missouri, United States of America.
Jarrod M. Ellingson
Affiliation:
University of Missouri, United States of America.
Nicholas G. Martin
Affiliation:
Queensland Institute of Medical Research, Brisbane, Australia.
*
*Address for correspondence: Wendy S. Slutske, Department of Psychological Sciences, 210 McAlester Hall, University of Missouri, Columbia, MO 65211, USA.

Abstract

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The purpose of this study was to examine potential biases in family history reports of problem gambling and gambling frequency. Same-sex twin pairs discordant for a history of problem (n = 230 pairs) and pathological gambling (n = 48 pairs) and for three indexes of gambling frequency (ever gambling, monthly gambling, and weekly gambling; n = 44–517 pairs) were identified from a large Australian national twin study. The problem gambling affected twin was significantly more likely to endorse paternal problem gambling than the problem gambling unaffected cotwin (OR = 5.5), and similar findings were obtained for family history reports of gambling frequency (OR = 2.0–2.8). These results could not be explained by differences between the discordant pairs in whether they had spent time gambling with the parents; there was no association between a history of problem, monthly or weekly gambling and having gambled with the parents among discordant twin pairs. The results of this study suggest that relying solely on family history assessments of disordered gambling and gambling involvement can lead to incorrect estimates of the strength of the family history effect.

Keywords

family historygamblingassessmentdiscordant twinssocial modeling
Type
Articles
Information
Twin Research and Human Genetics , Volume 13 , Issue 4 , 01 August 2010 , pp. 340 - 346
Copyright
Copyright © Cambridge University Press 2010