Ryan O'Mara

Event-level analyses of energy drink consumption and alcohol intoxication in bar patrons

AIM To assess event-level associations between energy drink consumption, alcohol intoxication, and intention to drive a motor vehicle in patrons exiting bars at night. METHOD Alcohol field study. Data collected in a U.S. college bar district from 802 randomly selected and self-selected patrons. Anonymous interview and survey data were obtained as well as breath alcohol concentration (BrAC) readings. RESULTS Results from logistic regression models revealed that patrons who had consumed alcohol mixed with energy drinks were at a 3-fold increased risk of leaving a bar highly intoxicated (BrAC> or =0.08g/210L), as well as a 4-fold increased risk of intending to drive upon leaving the bar district, compared to other drinking patrons who did not consume alcoholic beverages mixed with energy drinks. DISCUSSION These event-level associations provide additional evidence that energy drink consumption by young adults at bars is a marker for elevated involvement in nighttime risk-taking behavior. Further field research is needed to develop sound regulatory policy on alcohol/energy drink sales practices of on-premise establishments.

Perceived racial/ethnic discrimination, problem behaviors, and mental health among minority urban youth

Objectives. We examined perceived frequency and intensity of racial/ethnic discrimination and associations with high-risk behaviors/conditions among adolescents. Design. With surveys from 2490 racial/ethnic minority adolescents primarily with low socioeconomic status, we used regression analysis to examine associations between racial/ethnic discrimination and behavioral health outcomes (alcohol use, marijuana use, physical aggression, delinquency, victimization, depression, suicidal ideation, and sexual behaviors). Results. Most adolescents (73%) experienced racial/ethnic discrimination and 42% of experiences were ‘somewhat-’ or ‘very disturbing.’ Adolescents reporting frequent and disturbing racial/ethnic discrimination were at increased risk of all measured behaviors, except alcohol and marijuana use. Adolescents who experienced any racial/ethnic discrimination were at increased risk for victimization and depression. Regardless of intensity, adolescents who experienced racial/ethnic discrimination at least occasionally were more likely to report greater physical aggression, delinquency, suicidal ideation, younger age at first oral sex, unprotected sex during last intercourse, and more lifetime sexual partners. Conclusion. Most adolescents had experienced racial/ethnic discrimination due to their race/ethnicity. Even occasional experiences of racial/ethnic discrimination likely contribute to maladaptive behavioral and mental health outcomes among adolescents. Prevention and coping strategies are important targets for intervention.

An Exploratory Study of Bar and Nightclub Expectancies

Objective: The authors identified the principal components of bar and nightclub expectancy in college students and the associations between these factors and the risk behavior of night-clubbing. Participants: A total of 4,384 undergraduates enrolled at a large, public university participated. Methods: In the first phase (July-September 2007), the authors collected preliminary data from a convenience sample. In the second phase (March 2008), the authors collected data from a separate probability sample. Results: A principal components analysis revealed 4 reliable and distinct expectancy factors. Regression analyses revealed that after adjusting for the effects of alcohol and demographic variables, expectancies explained a significant proportion of variance in bar/nightclub attendance. Different expectancy profiles distinguished high-frequency nightclubbers from the most common bar attendance practice and nonmonogamous nightclubbers from monogamous nightclubbers. Conclusions: From a developmental perspective, nightclubbing appears to assist young adults with establishing and maintaining social networks, romantic and sexual relationships, and collegiate acculturation.

Event-specific analyses of poly-drug abuse and concomitant risk behavior in a college bar district in Florida

Objective: The authors describe the epidemiology of risk behavior associated with poly-drug use in a college bar district of a large campus community. Participants: A total of 469 bar patrons participated in the study. Methods: The authors used self-report data and biological measures collected from patrons outside bars in July and August of 2007. Results: The mean breath alcohol concentration of the exiting patrons was 0.09. Illicit and prescription drug use on the nights of data collection and in the recent past were significant features of the profile of patron risk behavior. About one-quarter of the patrons using only alcohol reported an intention to drive a vehicle within 60 minutes of leaving an establishment, compared with almost one-half of those using both alcohol and marijuana. Conclusions: A substantial amount of high-risk behavior was generated from the bar district on 4 typical nights. College bar districts should be a priority focus for prevention efforts.

Relationships between drinking onset, alcohol use intensity, and nighttime risk behaviors in a college bar district.

Objective: To identify antecedents of risk behavior events in college bar patrons. Methods: In this nighttime field study, self-report data and alcohol intoxication readings were collected from patrons immediately upon exiting bars (n = 618). Results: Multilevel structural equation modeling revealed positive associations between age of drinking onset and both alcohol use intensity in the past year and recent bar-going frequency. In turn, alcohol use intensity in the past year was positively associated with bar-going frequency and intoxication at bar exit. An association between drinking onset and bar-going frequency was mediated by alcohol use intensity in the past year. Conclusions: Discernable paths from age of drinking onset to monthly bar-going frequency and intoxication level after leaving a bar can be identified. The results highlight the critical role of drinking onset in development of college student alcohol abuse. Research is needed to determine whether college bars are environmental pathogens mediating between genetic risk factors and patron risk behavior.

Associations between bar patron alcohol intoxication and tobacco smoking.

OBJECTIVE To examine the event-specific relationship between alcohol intoxication and nighttime tobacco smoking among college bar patrons. METHODS In this secondary analysis of existing data, we examined event-specific associations between self-report measures of tobacco smoking and breath alcohol concentration (BrAC) readings obtained from 424 patrons exiting on-premise drinking establishments. RESULTS In a multivariable logistic regression analysis, acute alcohol intoxication was positively associated with same-night incidents of smoking tobacco, adjusting for the effects of established smoking practices and other potential confounders. CONCLUSIONS This investigation is the first known study using data collected in an on-premise drinking setting to link alcohol intoxication to specific incidents of tobacco smoking.

5-HTTLPR genotype and associations with intoxication and intention to drive: results from a field study of bar patrons

The serotonin transporter promoter polymorphism (5‐HTTLPR) has been linked to a number of human behavioral traits and disorders. The variants of 5‐HTTLPR are commonly reported in three forms, L/L, S/L and S/S, with the latter most often associated with emotional distress and/or behavioral dysfunction. Missing from the research literature are investigations that assess event‐level associations between 5‐HTTLPR genotype and specific incidents of risk behavior in natural drinking settings. This study reports associations between 5‐HTTLPR, alcohol intoxication and intention to drive among young adult patrons exiting on‐premise drinking establishments (i.e. bars) at night. Self‐report measures, breath alcohol concentration (BrAC) readings and saliva samples for DNA analysis were collected from 477 bar patrons. Analyses were performed on 225 patrons likely to be near their peak intoxication level for the night. Results from a linear regression revealed that the 5‐HTTLPR genotype was associated with exiting patron BrAC, after adjusting for random and fixed effects of other variables. An interaction effect involving 5‐HTTLPR and bar‐sponsored drink specials also had an independent association with BrAC, suggesting that selection of price‐discounted alcoholic beverages increased intoxication in patrons with an L allele. In addition, results from logistic regression indicated that patrons with the S/S genotype were three times more likely to intend to drive a motor vehicle (after drinking on the night of study participation) compared with those with the L/L genotype. The 5‐HTTLPR genotype may play an important role in the etiology of problems associated with on‐premise drinking establishments.