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  • Title: A direct, controlled, blind family study of DSM-IV pathological gambling.
    Author: Black DW, Coryell WH, Crowe RR, McCormick B, Shaw MC, Allen J.
    Journal: J Clin Psychiatry; 2014 Mar; 75(3):215-21. PubMed ID: 24500179.
    Abstract:
    OBJECTIVE: Pathological gambling is a major public health problem. We sought to examine the familiality of pathological gambling and determine patterns of familial aggregation of disorders. METHOD: We assessed probands with DSM-IV pathological gambling, controls, and their first-degree relatives. Detailed family history information was collected on relatives who were deceased or unavailable. RESULTS: Ninety-five pathological gambling probands, 91 controls, and their 1,075 first-degree relatives over age 18 (537 relatives of pathological gambling probands, 538 relatives of controls) were evaluated between February 2005 and June 2010. Relatives were assessed blind to proband status. Best estimate diagnoses were assigned. Rates of lifetime pathological gambling (definite/probable) was significantly greater among the first-degree relatives of probands with pathological gambling than among comparison relatives (11% vs 1%, OR = 8.19, P < .001). The prevalence of pathological gambling and subclinical pathological gambling combined was 16% and 3% in case and control relatives, respectively (OR = 6.57, P < .001). Pathological gambling relatives had higher rates of major depression (OR = 1.49, P < .05), bipolar disorder (OR = 3.82, P < .05), any mood disorder (OR = 1.59, P < .05), social anxiety disorder (OR = 4.76, P < .01), any substance use disorder (OR = 1.47, P < .05), posttraumatic stress disorder (OR = 2.59, P < .05), and antisocial personality disorder (OR = 3.72, P < .001). Antisocial personality disorder (OR = 3.12, P < .01), social anxiety disorder (OR = 4.15, P < .01), and posttraumatic stress disorder (OR = 2.85, P < .05) were more frequent in case relatives independent of the presence of pathological gambling. Age at onset of pathological gambling in case probands (< 40 years/≥ 40 years) was not related to familiality in their first-degree relatives (OR = 1.03, P = .927). CONCLUSIONS: Pathological gambling is familial. Mood and substance use disorders may emerge as a consequence of the pathological gambling or as a more complex syndrome. In contrast, antisocial personality disorder, social anxiety disorder, and posttraumatic stress disorder may share a common familial etiology with pathological gambling. The phenotype may extend beyond pathological gambling to include subclinical forms of the disorder.
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