The association between problem gambling and psychotic experiences: Findings from the Adult Psychiatric Morbidity Survey 2007

Background: Studies on the association between psychotic experiences (PEs) and problem gambling are lacking. Thus, we examined the association between PEs and problem gambling in the general UK population. Methods: This study used community-based, cross-sectional data from the 2007 Adult Psychiatric Morbidity Survey (APMS) (n=7403). Ten items from the DSM-IV criteria and the British Gambling Prevalence Survey studies were used to ascertain problem gambling among individuals who gambled in the past 12 months. Respondents were classified as no problem (0 criteria), at-risk (1 or 2 criteria) and problem gambling (>= 3 criteria). Past 12-month PE was assessed with the Psychosis Screening Questionnaire. Multivariable logistic regression models were constructed to assess the association between gambling status (exposure variable) and PE (outcome variable). Results: The final sample consisted of 7363 people aged >= 16 years with no definite or probable psychosis [ mean (SD) age 46.4 (18.6) years; 51.2% females]. The prevalence of PE in those with no problem, at-risk, and problem gambling were 5.1%, 11.1%, and 29.7%, respectively. In the model adjusted for sociodemographics, common mental disorders and risky health behaviors, at-risk (OR = 1.88; 95% CI: 1.11-3.19) and problem gambling (OR = 4.64; 95% CI: 1.78-12.13) were associated with an increased odds for PE. Conclusion: Problem gambling and PE tend to co-exist. Further research is needed to gain a better understanding of the mechanisms that underlie the association observed. (C) 2018 Elsevier B.V. All rights reserved.