The distribution of alcohol consumption and the prevention paradox in Brazil

Aims To examine the proportion of self‐reported alcohol consumed by different gender and age groups in Brazil over the past year, and to examine whether the ‘prevention paradox’ applies to Brazilian data on alcohol‐related problems. Design A multi‐stage cluster sample, representative of the Brazilian household population. Setting This study was conducted in Brazil between November 2005 and April 2006. Participants Respondents were aged ≥ 14 years (n = 3007). Measurements Measures included past year estimates of (i) number of standard drinks, (ii) frequency of binge drinking, and (iii) alcohol‐related problems. Findings The survey response rate was 66.4%. The top 2.5% of the drinkers by volume consume 14.9%, the top 5% consume 27.4% and the top 10% consume 44.2% of all alcohol consumed in Brazil. Men consume 77.8% of the total alcohol, and 18–29‐year‐olds consume 40.3%. Individuals below risky drinking guidelines for weekly volumetric intake account for 49–50% of all problem drinkers and 45–47% of all problem types reported. Individuals who do not binge or who binge infrequently (1–3 times/year) account for 50–51% of all problem drinkers and 45–46% of all reported problem types. Most binge drinkers are low‐volume drinkers. Conclusions Consistent with the prevention paradox literature, most drinking problems in Brazil are associated with low or moderate drinking. Binge drinking accounts more clearly for the distribution of alcohol problems than total volume consumed.     

The prevalence of alcohol use disorders among night-time weekend drivers

Aims The objective of this study was to establish the extent of alcohol use disorders (AUDs) among drivers at risk for alcohol‐related crashes. The prevalence of drivers with AUDs on US roads on weekend evenings when alcohol‐related crashes are most frequent is unknown. This study will inform laws and programs designed to reduce alcohol‐involved crashes. Design Interviews using a 15‐item AUD questionnaire with a stratified random sample of non‐commercial drivers at 60 primary sampling locations in the 48 contiguous states on Fridays and Saturdays between 10 p.m. and 3 a.m. from July to November 2007. Setting Off‐road locations into which a police officer directed a random selection of motorist passing the site. Participants A total of 4614 drivers of non‐commercial vehicles. Measurements AUDs, including heavy drinking, alcohol abuse, and alcohol dependence. Findings Of the participating drivers, 73.7% were current drinkers (reported drinking in the last year). Among those drinkers, 14% were classifiable either as dependent drinkers or as abusive drinkers based on self‐reports of drinking. Another 10% of the drivers were classified as heavy drinkers. Nearly half of the drivers in the survey who had blood alcohol concentrations (BACs) at or higher than the 0.08 g per deciliter legal limit fell into one of those three AUD categories. Conclusions Survey data suggest that the majority of high‐blood alcohol concentration drivers on US roads show no clinical signs of an alcohol use disorder, but they are categorized as heavy drinkers. This suggests that environmental programs directed at reducing heavy drinking and brief behavioral interventions aimed at reducing episodes of excessive consumption have promise for reducing alcohol‐related crashes.     

Alcohol use,heavy episodic drinking and subsequent problems among adolescents in 23 European countries: does the prevention paradox apply?

Aims According to the prevention paradox, a majority of alcohol‐related problems in a population can be attributed to low to moderate drinkers simply because they are more numerous than heavy drinkers, who have a higher individual risk of adverse outcomes. We examined the prevention paradox in annual alcohol consumption, heavy episodic drinking (HED) and alcohol‐related problems among adolescents in 23 European countries. Design and setting Survey data from the 2007 European School Survey Project on Alcohol and Drugs (ESPAD) among 16‐year‐old students were analysed. Participants A total of 38 370 alcohol‐consuming adolescents (19 936 boys and 18 434 girls) from 23 European countries were included. Measurements The upper 10% and the bottom 90% of drinkers by annual alcohol intake, with or without HED, and frequency of HED, were compared for the distribution of 10 different alcohol‐related problems. Findings Although the mean levels of consumption and alcohol‐related problems varied largely between genders and countries, in almost all countries the heavy episodic drinkers in the bottom 90% of consumers by volume accounted for most alcohol‐related problems, irrespective of severity of problem. However, adolescents with three or more occasions of HED a month accounted for a majority of problems. Conclusions The prevention paradox, based on measures of annual consumption and heavy episodic drinking, seems valid for adolescent European boys and girls. However, a minority with frequent heavy episodic drinking accounted for a large proportion of all problems, illustrating limitations of the concept. As heavy episodic drinking is common among adolescents, our results support general prevention initiatives combined with targeted interventions.     

Types of drinkers and drinking settings: an application of a mathematical model

Aims US college drinking data and a simple population model of alcohol consumption are used to explore the impact of social and contextual parameters on the distribution of light, moderate and heavy drinkers. Light drinkers become moderate drinkers under social influence, moderate drinkers may change environments and become heavy drinkers. We estimate the drinking reproduction number, R_d, the average number of individual transitions from light to moderate drinking that result from the introduction of a moderate drinker in a population of light drinkers. Design and Settings Ways of assessing and ranking progression of drinking risks and data‐driven definitions of high‐ and low‐risk drinking environments are introduced. Uncertainty and sensitivity analyses, via a novel statistical approach, are conducted to assess R_d variability and to analyze the role of context on drinking dynamics. Findings Our estimates show R_d well above the critical value of 1. R_d estimates correlate positively with the proportion of time spent by moderate drinkers in high‐risk drinking environments. R_d is most sensitive to variations in local social mixing contact rates within low‐risk environments. The parameterized model with college data suggests that high residence times of moderate drinkers in low‐risk environments maintain heavy drinking. Conclusions With regard to alcohol consumption in US college students, drinking places, the connectivity (traffic) between drinking venues and the strength of socialization in local environments are important determinants in transitions between light, moderate and heavy drinking as well as in long‐term prediction of the drinking dynamics.     

Age differences in diagnostic criteria of DSM-IV alcohol dependence among adults with similar drinking behaviour

Aims To test age differences in the prevalence of DSM‐IV alcohol dependence (AD) diagnostic criteria in the adult general population while controlling for drinking behaviour. Design and setting Cross‐sectional data from the 2006 German Epidemiological Survey of Substance Abuse (ESA) were used, applying a two‐stage probability sampling design. The survey used self‐administered questionnaires and telephone interviews (mixed‐mode design; 45% response rate). Participants The analytical sample consisted of n = 6984 individuals aged 18–64 years reporting alcohol consumption within the previous year. Measurements Age effects on individual AD criteria were estimated using logistic regression models, adjusting for eight mutually exclusive drinking groups (defined in terms of average daily alcohol intake and episodic heavy drinking) and socio‐economic variables. Findings When controlling for drinking behaviour, 18–24‐year‐olds were more likely to meet the criteria ‘tolerance’, ‘larger/longer’ and ‘time spent’ relative to older age groups. In contrast, the likelihood of experiencing ‘withdrawal’ symptoms increased with age. There was no significant age effect on the diagnosis of AD. Conclusions Age differences in the prevalence of specific alcohol dependence diagnostic criteria such as ‘tolerance’, ‘drinking larger amount or for longer than intended’ and ‘time spent recovering’ cannot be fully explained by differences in drinking behaviour.     

Drinking behaviour among men and women in China: the 2007 China Chronic Disease and Risk Factor Surveillance

Aim To obtain information on drinking behaviour and to examine the associations between frequency of drinking, usual daily drinking quantity and binge drinking behaviour among Chinese residents aged 15–69 years. Design A multi‐stage clustering sampling method was used to select a nationally representative sample and data were collected as part of the China Chronic Disease and Risk Factor Surveillance by face‐to‐face interview. Setting Respondents were selected randomly from 160 counties/districts scattered over 31 provinces/autonomous regions/municipalities between August and October, 2007. Participants Weighted analyses included 49 527 Chinese residents (aged 15–69 years). Measurements Prevalence of current drinking and usual daily quantity, median number of annual binge drinking episodes, proportions of excessive drinking, frequent drinking and binge drinking among current drinkers were the main measurements. Results The prevalence of male, female and total current drinking was 55.6%, 15.0% and 35.7%, respectively. On average, male drinkers consumed 47.8 g alcohol per drinking day, whereas females consumed 19.1 g. The median numbers of annual binge drinking episodes were 5.6 for male drinkers and 2.4 for females. Among the current drinkers, proportions of excessive drinking, frequent dinking and binge drinking were 62.7%, 26.3%, 57.3% for men and 51.0%, 7.8%, 26.6% for women, respectively. Logistic regressions showed that binge drinking was associated strongly with drinking frequency and drinking quantity increased with drinking frequency for both genders. Conclusions Excessive drinking, frequent drinking and binge drinking behaviour have reached epidemic proportions among current drinkers in China, and culturally appropriate public health strategies to reduce hazardous drinking behaviour are needed.     

Alcohol and cardiovascular diseases: where do we stand today?

For centuries, multiple medical risks of heavy alcohol drinking have been evident with simultaneous awareness of a less harmful or sensible drinking limit. The increased risks of heavy drinking, defined as three or more standard‐sized drinks per day, are both cardiovascular (CV) and non‐CV. The CV risks include the following: (i) alcoholic cardiomyopathy (ACM), (ii) systemic hypertension, (iii) atrial arrhythmias, (iv) haemorrhagic stroke and, probably, ischaemic stroke. By contrast, modern epidemiological studies have shown lower morbidity and mortality amongst light–moderate drinkers, due mostly to a reduced risk of coronary artery disease (CAD), with contributions from ischaemic stroke and heart failure (HF). A low level of alcohol drinking has no clear relation to increased risk of any CV condition, except for haemorrhagic stroke. There is good evidence that supports the existence of mechanisms by which alcohol might protect against CAD, but the mechanisms for other alcohol–CV associations remain unclear. Interrelationships amongst the CV conditions affect the individual alcohol–disease relationships; for example, lower CAD risk in light–moderate drinkers is to a large extent responsible for the reduced HF risk. International comparison data plus the presence of proposed beneficial nonalcohol components in wine (particularly in red wine) suggest that this beverage type might afford extra CAD protection. However, the effect of beverage choice is confounded by a healthier drinking pattern and more favourable risk traits in wine drinkers. Debate persists about methodological and public health issues related to the epidemiology of alcohol‐related CV disease.     

Neural correlates of verbal learning in adolescent alcohol and marijuana users

Aims Alcohol and marijuana are the most widely used intoxicants among adolescents, yet their potential unique and interactive influences on the developing brain are not well established. Brain regions subserving learning and memory undergo continued maturation during adolescence, and may be particularly susceptible to substance‐related neurotoxic damage. In this study, we characterize brain response during verbal learning among adolescent users of alcohol and marijuana. Design Participants performed a verbal paired associates encoding task during functional magnetic resonance imaging (fMRI) scanning. Setting Adolescent subjects were recruited from local public schools and imaged at a university‐based fMRI center. Participants Participants were 74 16–18‐year‐olds, divided into four groups: (i) 22 controls with limited alcohol and marijuana experience, (ii) 16 binge drinkers, (iii) eight marijuana users and (iv) 28 binge drinking marijuana users. Measurements Diagnostic interview ensured that all teens were free from neurological or psychiatric disorders; urine toxicology and breathalyzer verified abstinence for 22–28 days before scanning; a verbal paired associates task was administered during fMRI. Findings Groups demonstrated no differences in performance on the verbal encoding task, yet exhibited different brain response patterns. A main effect of drinking pointed to decreased inferior frontal but increased dorsal frontal and parietal fMRI response among binge drinkers (corrected P < 0.05). There was no main effect of marijuana use. Binge drinking × marijuana interactions were found in bilateral frontal regions (corrected P < 0.05), where users of either alcohol or marijuana showed greater response than non‐users, but users of both substances resembled non‐users. Conclusions Adolescent substance users demonstrated altered fMRI response relative to non‐using controls, yet binge drinking appeared to be associated with more differences in activation than marijuana use. Alcohol and marijuana may have interactive effects that alter these differences, particularly in prefrontal brain regions.     

Exploring the emergence of alcohol use disorder symptoms in the two years after onset of drinking: findings from the National Surveys on Drug Use and Health

Aims This study investigates the occurrence of clinical features of alcohol dependence and socially maladaptive drinking during the first 24 months after the onset of alcohol use. Design Data for this study are from the nationally representative 2004–07 National Surveys on Drug Use and Health (NSDUH). Setting General population of the United States, aged 12 years and older. Participants New‐onset alcohol users (NOAUs) were drinkers who started to drink alcohol within 24 months of the NSDUH assessment and consumed alcohol during the last 12 months. Measurements The NSDUH assessed for clinical features of alcohol dependence and socially maladaptive drinking, consistent with the DSM‐IV. Findings NOAUs frequently experienced problems relating to self‐reported tolerance, spending a great deal of time recovering from the effects of alcohol and unsuccessful attempts at cutting down on drinking. The likelihood of experiencing the clinical features increased steadily in the first 9 months after use, but appeared to plateau or only gradually increase thereafter. Strong evidence emerged that the clinical features measured a single latent dimensional of ‘alcohol use disorder’ (AUD) in this sample. The majority of the clinical features were good indicators of the underlying AUD continuum in the 2 years after first drinking onset. Conclusions There may be a period of time during the second year of alcohol use, when level of alcohol use disorder fluctuates rather than increases. Public health and safety efforts designed to target problematic alcohol use in the earliest stages of alcohol involvement could be useful in preventing the escalation of alcohol problems in this group of drinkers.     

A prospective study of the association between smoking and later alcohol drinking in the general population

Aims To address the possible prospective association between smoking habits and risk of later heavy drinking in the adult population. Design Pooled population‐based long‐term cohort studies with repeated assessments of smoking and alcohol habits. Setting Copenhagen, Denmark. Participants A total of 14 130 non‐ to moderate drinkers at baseline, who attended re‐examination. Measurements Among the non‐ to moderate drinkers we addressed the relation between smoking habits at first examination and the risk of becoming a heavy and excessive drinker at follow‐up. Findings Level of tobacco consumption at first examination predicted an increased risk of becoming a heavy and excessive drinker in a dose‐dependent manner. Men who smoked more than 25 g of tobacco per day had adjusted odds ratios of 2.12 (95% confidence interval (CI): 1.44–3.11) and 3.95 (95% CI: 1.93–8.95) for becoming heavy and excessive drinkers, compared to participants who had never smoked. Equivalent estimates among women were 1.76 (95% CI: 1.02–3.04) and 2.21 (95% CI: 1.00–4.58), respectively. Conclusions This study suggests that tobacco use is associated quantitatively with later risk of heavier drinking.     

Risky drinking and alcohol use patterns in a national sample of women of childbearing age

AIMS: We examined risky drinking and alcohol use patterns associated with prenatal effects of alcohol exposure in women of childbearing age, using various definitions of low-risk drinking. DESIGN: Computer-assisted telephone interview (CATI) methodology was used to gather information in a cross-sectional survey on alcohol use and problems, pregnancy and likelihood of future pregnancy. SETTING: Participants were respondents in the 2000 National Alcohol Survey (NAS, N10, response rate 58%) which includes men and women from all 50 states of the United States and the District of Columbia. PARTICIPANTS: A total of 1504 women aged 18-39 years were included; 72 were pregnant, 511 were currently not pregnant but reported being likely to be pregnant in the next 5 years, and 921 women were neither pregnant nor likely to be in the next 5 years. MEASUREMENTS: Various alcohol use patterns in the past 12 months including average volume, amount per session, drinking with food and time spent drinking were assessed. FINDINGS: Seven per cent of childbearing age women exceeded guidelines used to classify women as risky drinkers in the past month. Thirty per cent were classified as risky drinkers when these guidelines were extended to past-year drinking. Examination of specific alcohol use patterns revealed that while under 10% of risky drinkers reported past-month heavy episodic drinking, 30% or more reported heavy episodic drinking and exceeding daily limits for alcohol consumption in the past year. CONCLUSIONS: Public health professionals should note that past-year drinking in a significant proportion of women of childbearing age exceeds guidelines for alcohol use. When targeting such prevention efforts, they should thus include assessment of past-year alcohol use patterns.     

Measuring average alcohol consumption: the impact of including binge drinks in quantity-frequency calculations

AIMS: Average daily alcohol consumption is usually calculated based on self-reports of the quantity (number of drinks consumed per drinking-day) and frequency (number of drinking-days) of alcohol consumption within a given time period. However, this method may underestimate average daily alcohol consumption (and in turn, the prevalence of heavy drinking), because studies demonstrate that respondents do not typically include binge drinking occasions in estimates of their 'usual' or 'average' daily alcohol consumption. DESIGN: We used the Behavioral Risk Factor Surveillance System (BRFSS), an annual random-digit telephone survey of US adults aged 18 years or older, to estimate average daily alcohol consumption using standard quantity-frequency questions, and then recalculated this measure by including self-reports of binge drinking. The proportion of respondents who met a standard, sex-specific definition of heavy drinking based on average daily alcohol consumption was then assessed nationally and for each state. FINDINGS: Compared to standard quantity-frequency methods, including binge drinks in calculations of average daily alcohol consumption increased the relative prevalence of heavy drinking among all adults by 19% to 42% (depending on the method used to estimate the number of drinks per binge). Among binge drinkers, the overall prevalence of heavy drinking increased 53% relative to standard quantity-frequency methods. As a result, half of women binge drinkers and half of binge drinkers aged 55 or older met criteria for heavy drinking. CONCLUSIONS: Including binge drinks (especially the application of age- and sex-specific estimates of binge drinks) in the calculation of average daily alcohol consumption can improve the accuracy of prevalence estimates for heavy drinking among US adults, and should be considered to increase the usefulness of this measure for alcohol surveillance.     

Alcohol's harm to others: reduced wellbeing and health status for those with heavy drinkers in their lives

Aims The impact of alcohol on those other than the drinker is an under‐researched area with important policy implications. This study is a first step in investigating relationships between exposure to heavy drinkers in respondent's lives with measures of health status and wellbeing. Design setting and participants A cross‐sectional general population survey was carried out among 3068 New Zealand residents aged 12–80 years (response rate 64%) using an in‐house computer‐assisted telephone interviewing system. Measurements Respondents' estimates of health status (European Quality of Life–5 Dimensions) and subjective wellbeing (Personal Wellbeing Index) were measured along with self‐reports of heavy drinkers in their lives, demographic variables and own drinking. Findings More than one in four of the sample had experienced someone they considered to be a heavy drinker in their environment in the past 12 months. An index of exposure to heavy drinkers, reflecting numbers of heavy drinkers and cohabitation, predicted lower health status and personal wellbeing while controlling for demographic variables and respondent's own drinking Conclusions Cross‐sectional data from a general population sample suggest that there is a relationship between exposure to heavy drinkers and reduced personal wellbeing and poorer health status. Exposure to heavy drinkers may have negative impacts for others.     

Reducing youth alcohol drinking through a parent-targeted intervention: the Orebro Prevention Program

Aims To evaluate a 2.5‐year prevention programme working through parents, targeting drinking among 13–16‐year‐olds. Design Quasi‐experimental using matched controls with a pre–post, intention‐to‐treat design. Setting Schools located in inner city, public housing and small town areas. Participants A total of 900 pupils entering junior high school and their parents, followed longitudinally. Intervention Parents received information by mail and during parent meetings in schools urging them to: (i) maintain strict attitudes against youth alcohol use and (ii) encourage their youth's involvement in adult‐led, organized activities. Measurements Evaluation of the implementation used measures of parental attitudes against underage drinking and youths' participation in organized activities. Outcomes were youths' drunkenness and delinquency. Findings The implementation successfully influenced parents' attitudes against underage drinking, but not youth participation in organized activities. At post‐test, youths in the intervention group reported less drunkenness and delinquency. Effect sizes were 0.35 for drunkenness and 0.38 for delinquency. Findings were similar for boys and girls and for early starters. Effects were not moderated by community type. Conclusions Working via parents proved to be an effective way to reduce underage drinking as well as delinquency.     

A quantification of alcohol-related mortality in New Zealand

Background: There are no published New Zealand (NZ) studies on alcohol drinking and total mortality, despite its importance to alcohol health policy.
Aims: To estimate the proportion of NZ deaths caused or prevented by alcohol drinking.
Methods: The proportion of current alcohol drinkers from recent NZ surveys, and pooled relative risks from a review of the international literature on alcohol and mortality, were used to calculate disease-specific population attributable risks. The number of deaths caused (or prevented) by alcohol were calculated for 1987 New Zealand deaths. Person-years of life lost (or saved) were calculated using recent NZ life tables.
Results: The association between alcohol and total mortality was related to age. Alcohol was estimated to have caused 3.0% of all deaths among 0–14 year olds and 20.1% of deaths among 15–34 year olds, mostly from road injuries. In contrast, alcohol was estimated to have prevented 0.5% of all deaths among 35–64 year olds and 3.4% of deaths among >65 year olds due to its protective effect against coronary heart disease. For all age groups, alcohol was estimated to have prevented 1.5% of deaths. However, the number of person-years of life lost among ages less than 35 years was greater than those saved in the older age groups, so that alcohol was estimated to have caused the loss of 9525 person-years of life for all ages combined.
Conclusions: The adverse effects of alcohol on total mortality are confined to age groups less than 35 years. Public health policy to minimise deaths from alcohol should be concentrated on this group.     

A dose–response perspective on college drinking and related problems

Aims In order to examine the degree to which heavy drinking contributes to risks for problems among college drinkers this paper develops and tests a dose–response model of alcohol use that relates frequencies of drinking specific quantities of alcohol to the incidence of drinking problems. Methods A mathematical model was developed that enabled estimation of dose–response relationships between drinking quantities and drinking problems using self‐report data from 8698 college drinkers across 14 campuses in California, USA. The model assumes that drinking risks are a direct monotone function of the amount consumed per day and additive across drinking days. Drinking problems accumulate across drinking occasions and are the basis for cumulative reports of drinking problems reported by college drinkers. Results Statistical analyses using the model showed that drinking problems were related to every drinking level, but increased fivefold at three drinks and more gradually thereafter. Problems were associated most strongly with occasions on which three drinks were consumed, and more than half of all reported problems were related to occasions on which four or fewer drinks were consumed. There were some important differences in dose–responsiveness between men and women and between different groups of ‘light’, ‘moderate’ and ‘heavier’ drinkers. Conclusion Many problems among college students are associated with drinking relatively small amounts of alcohol (two to four drinks). Programs to reduce college drinking problems should emphasize risks associated with low drinking levels.     

Alcohol consumption and mortality in Alameda County

The association between level of alcohol consumption and 15-year mortality, focusing particularly on the possible protective effect of light drinking compared to abstention, was studied in a representative population sample of 6928 residents of Alameda County, California. Because abstainers differ from light, moderate and heavy drinkers on a number of demographic, physical, and psychosocial characteristics, the role of these as confounders of the alcohol/mortality association was examined. Using multiple logistic models, the mortality experience of abstainers, moderate drinkers, heavy drinkers and very heavy drinkers was compared with that of light drinkers. Among men only, very heavy drinkers were at significantly greater risk of death from all causes than were light drinkers (OR = 2.5, p less than 0.01). Neither abstainers nor other drinkers were at significantly higher risk of death from ischemic heart disease than were light drinkers. This pattern of results persisted with adjustment for 11 covariates of alcohol consumption in addition to age.     

Trajectory classes of heavy episodic drinking among Asian American college students

Aims Heavy episodic drinking (HED) among Asian Americans is a growing concern. However, little is known about the etiology and developmental patterns of HED among Asian Americans, even though this group is one of the fastest‐growing populations in the United States. Design Three year longitudinal design. Participants Sample included 404 Asian American college students transitioning from high school, through the college years. Measurement Measures included heavy episodic drinking, parental and peer relationships, alcohol expectancies, drinking values, and alcohol‐related problems. Findings Results from growth‐mixture models (GMM) identified two discrete latent classes of HED comprising 59% of our sample: these trajectory classes (high increasers and low increasers) corresponded to expected changes and stability in well‐established correlates of drinking behaviour, including alcohol‐related problems, personal drinking values and alcohol expectancies. Parental awareness and caring and quality of peer relationships during senior year of high school were associated directly and indirectly with HED class membership. Conclusion These findings advance the literature by providing information about the developmental course of HED among Asian American young adults. The significant within‐group variability in problematic drinking in this sample highlights the fact that subgroups of high‐risk drinkers can be identified even in relatively low‐risk groups such as Asian Americans.     

Investigation of a brief teaching encounter using standardized patients

OBJECTIVE: To investigate a brief teaching intervention using standardized patients (SPs) trained to improve residents’ detection and advising of problem drinkers. DESIGN: Pretest-posttest design assessing resident behavior and skills. SUBJECTS: Nineteen internal medicine residents in a University Hospital General Internal Medicine Clinic. INTERVENTION: Announced SPs were interviewed by residents and presented to faculty who provided brief instruction on the National Institute on Alcohol Abuse and Alcoholism guidelines for screening and brief counseling of problem drinkers. MEASURE: Unannounced SPs assessed resident behavior and skills. RESULTS: Following the teaching intervention, 2 times more residents screened for alcohol use and nearly 3 times more residents did brief counseling. Residents reported that the intervention was informative and valuable. CONCLUSION: A single, 1-hour teaching intervention lead to a 2- to 3-fold increase in resident detection and advising of problem drinkers. SPs provide effective teaching encounters and a useful measure of resident behavior. This paper was presented at the 18^th SGIM Annual Meeting, San Diego, Calif, May, 1995. This research was supported in part by a faculty development grant, D28PE55024, from the U.S. Public Health Service and the Health Resources and Services Administration.     

Initial,habitual and compulsive alcohol use is characterized by a shift of cue processing from ventral to dorsal striatum

Aims During the development of drug addiction, initial hedonic effects decrease when substance use becomes habitual and ultimately compulsive. Animal research suggests that these changes are represented by a transition from prefrontal cortical control to subcortical striatal control and within the striatum from ventral to dorsal domains of the striatum, but only limited evidence exists in humans. In this study we address this hypothesis in the context of alcohol dependence. Design, setting and participants Non‐abstinent heavy social drinkers (n = 21, 5.0 ± 1.5 drinks/day, 13 of them were alcohol‐dependent according to DSM‐IV) and light social drinkers (n = 10, 0.4 ± 0.4 drinks/day) were examined. Measurements We used a cue‐reactivity functional magnetic resonance imaging (fMRI) design during which pictures of alcoholic beverages and neutral control stimuli were presented. Findings In the dorsal striatum heavy drinkers showed significant higher activations compared to light drinkers, whereas light social drinkers showed higher cue‐induced fMRI activations in the ventral striatum and in prefrontal areas compared to heavy social drinkers [region of interest analyses, P < 0.05 false discovery rate (FDR)‐corrected]. Correspondingly, ventral striatal activation in heavy drinkers correlated negatively with obsessive‐compulsive craving, and furthermore we found a positive association between cue‐induced activation in the dorsal striatum and obsessive‐compulsive craving in all participants. Conclusions In line with our hypothesis we found higher cue‐induced activation of the ventral striatum in social compared to heavy drinkers, and higher dorsal striatal activation in heavy drinkers. Increased prefrontal activation may indicate that social drinkers activate cortical control when viewing alcohol cues, which may prevent the development of heavy drinking or alcohol dependence. Our results suggest differentiating treatment research depending on whether alcohol use is hedonic or compulsive.