The Australian Twin Study of Gambling (OZ-GAM): Rationale, Sample Description, Predictors of Participation, and a First Look at Sources of Individual Differences in Gambling Involvement

• DOI: 10.1375/twin.12.1.63
• Publication Date: 2009-02-12T02:46:50Z
• Authors: Wendy S. Slutske; Madeline H. Meier; Gu Zhu; Dixie J. Statham; Alex Blaszczynski; Nicholas G. Martin
• Keywords: Lottery; Sample (material)

Abstract Two major challenges to conducting a community-based twin study of pathological gambling (PG) disorder are that: (a) it is relatively rare, and (b) individuals with the in community may be difficult locate recruit. We describe new 4,764 recruited from Australian Twin Registry which we attempt effectively deal first challenge examine impact second challenge. The lifetime prevalence DSM-IV PG this sample was 2.2%, 400–500% higher than has been obtained surveys conducted United States. A number predictors non-participation were identified, including diagnosis, but these did not have large net effect on estimated or related characteristics sample. Results biometric modeling suggested that genetic, shared family environmental, nonshared environmental influences propensity engage 11 different specific forms (e.g., playing lottery, betting horse dog races, electronic gaming machines) generally moderate, low, respectively, mean parameter estimates 43%, 10%, 46%. An intriguing comparison results 1963 US adolescent by Loehlin Nichols (1976) suggests genes for involvement more likely expressed heavy-gambling culture, environment transient behavior young people.