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Michael R Woodford1, Amy R Krentzman2, Maurice N Gattis31School of Social Work, University of Michigan, Ann Arbor, MI, USA; 2Department of Psychiatry, University of Michigan, Ann Arbor, MI, USA; 3School of Social Work, University of Wisconsin-Madison, Madison, WI, USAPurpose: Research suggests that discrimination contributes to increased substance use among sexual minorities. Subtle discrimination and witnessing mistreatment, however, have received little attention. Using minority stress theory as a conceptual framework the authors examined the intersection of sexual orientation, experiencing and witnessing incivility and hostility, and students' alcohol and drug use. The authors hypothesized that experiencing/witnessing incivility/hostility would mediate the relationship between sexual minority status and drinking and drug use, as well as problematic use of these substances.Methods: Data were taken from a campus climate survey (n = 2497; age mean [M] = 23.19 years; 61% female; 17% sexual minorities). Controlling for demographics, logistic regressions depicted specifications for each path of the mediation analysis and bootstrapping was used to assess the significance of each sexual minority-mistreatment-drinking/drug use path.Results: Experiencing incivility mediated the relationship between sexual minority status and problematic drinking. Sexual minority college students were more likely to personally experience incivility (adjusted odds ratio [AOR] = 1.87; 95% confidence interval [CI] = 1.51–2.33), which was associated with greater odds of problematic drinking (AOR = 1.64; 95% CI = 1.35–2.00). The mediation path was significant at P < 0.001. Further, witnessing hostility mediated the relationship between sexual minority status and problematic drinking. Sexual minority college students were more likely to witness hostility (AOR = 1.87, 95% CI = 1.48–2.36), which was associated with greater odds of problematic drinking (AOR = 1.53; 95% CI = 1.24–1.90). The mediation path was significant at P < 0.01.Conclusion: The results provide further evidence for minority stress theory and suggest that clinical alcohol use interventions with sexual minorities need to assess personal incivilities and witnessing interpersonal mistreatment, especially hostility. Campus climate interventions that address subtle discrimination as well as harassment and violence may help reduce problematic drinking.Keywords: sexual orientation, discrimination, minority stress, campus climate, drinking, substance use

Despite clinical reports of other withdrawal-like symptoms, the DSM-IV considers only restlessness/irritability as a withdrawal-like criterion comprising pathological gambling disorder (PGD). We explored whether this criterion should be broadened to include other gambling withdrawal-like symptoms.Community-recruited adult gamblers (n = 312) participated in telephone interviews about gambling and related behaviors as a part of a larger psychometric study. Frequency and chi-square analyses described the association of gambling withdrawal-like symptoms by gambling disorder status. Multinomial forward selection logistic regression obtained a multivariate model describing the simultaneous relationship between these symptoms and gambling disorder status.One-quarter of the sample experienced the DSM-IV PGD criterion of restlessness/irritability. However, 41% experienced additional gambling withdrawal-like symptoms when attempting to quit or control gambling. A model including restlessness/irritability and three additional non-DSM-IV withdrawal-like symptoms (i.e. feelings of anger, guilt, and disappointment) is a stronger model of gambling disorder (chi(2) = 217.488; df = 8, p < 0.0001; R(2) = 0.5428; p < 0.0001) than restlessness/irritability alone (chi(2) = 151.278; df = 2, p < 0.0001; R(2) = 0.4133). The overlap of gambling withdrawal-like symptoms with substance use withdrawal (11%) and depressive symptoms (34%) failed to fully account for these associations with gambling disorder status.Future PGD conceptualization and potential criteria revisions for DSM-V may warrant a broader inclusion of gambling withdrawal-like symptoms.