Different measures of alcohol use as predictors of DSM-5 alcohol use disorder among adolescents - A cohort study from Sweden.

BACKGROUND AND AIMS: This study addresses a significant gap in existing research by investigating the longitudinal relationship between various measures of alcohol use and the development of alcohol use disorders (AUDs) in a cohort of Swedish adolescents. METHODS: A prospective longitudinal survey was conducted on 3999 adolescents in Sweden who were in 9th grade in 2017 and were followed up in 2019. Baseline assessments included lifetime alcohol use, recent use (past 30 days), risky drinking (AUDIT-C), and heavy episodic drinking (HED). Follow-up assessments comprised eleven items measuring DSM-5 AUD criteria. The study explores prospective associations between these diverse alcohol use measures and the occurrence of AUD, while also calculating population attributable fractions (PAF). FINDINGS: The proportion of alcohol consumers who met the criteria for AUD at follow-up was 31.8%. All baseline measures of alcohol use exhibited associations with subsequent AUD. Notably, the HED group demonstrated the highest prevalence of AUD at 51.4% (p<.001). However, when calculating PAFs, any lifetime alcohol use emerged as the most substantial contributor, accounting for 10.8% of all subsequent AUD cases. CONCLUSIONS: This study underscores that alcohol use during mid-adolescence heightens the risk of developing AUD in late adolescence. Among the various measures, heavy episodic drinking presents the highest risk for later AUD. From a public health perspective, preventing any alcohol use emerges as the most effective strategy to mitigate the population-level burden of disease of AUD.

The impact of the COVID-19 pandemic on mortality in Sweden-Did it differ across socioeconomic groups?

The characterization of the socioeconomic profile of COVID-19 mortality is limited. Likewise, the mapping of potential indirect adverse outcomes of the pandemic, such as suicide and alcohol abuse, along socioeconomic lines is still meagre. The main aim of this paper is to (i) depict SES-differences in COVID-19 mortality, and (ii) to assess the impact of the COVID-19 pandemic on suicide and alcohol mortality across socioeconomic groups. We used Swedish monthly data spanning the period January 2016-December 2021. We chose education as indicator of socioeconomic status (SES). The following causes of deaths were included in the analysis: COVID-19, all-cause mortality excluding COVID-19, suicide and a composite index of alcohol-specific deaths. SARIMA-modelling was used to assess the impact of the pandemic on suicide and alcohol-specific mortality. Two alternative measures of the pandemic were used: (1) a dummy that was coded 1 during the pandemic (March 2020 and onwards), and 0 otherwise, and (2) the Oxford COVID-19 Government Response Tracker's Stringency Index. There was a marked SES-gradient in COVID-19 mortality in the working-age population (25-64) which was larger than for other causes of death. A SES-gradient was also found in the old-age population, but this gradient did not differ from the gradient for other causes of death. The outcome from the SARIMA time-series analyses suggested that the pandemic did not have any impact on suicide or alcohol-specific mortality in any of the educational and gender groups.

Associations Between Cannabis Use and Mental Distress in Young People: A Longitudinal Study.

PURPOSE: Despite a large number of studies on the relation between cannabis use and mental distress in adolescence, results are inconclusive regarding the nature of this association. The aim of the present study is to expand this body of research by analyzing the within-person association between changes in cannabis use and changes in mental distress among young people. METHODS: We used longitudinal data from a national sample of young people in Norway. The cohort was assessed in 1992 (T1), 1994 (T2), 1999 (T3), and 2005 (T4). The cumulative response rate was 60%. Respondents who participated in all four waves, aged 11-18 years at T1 (N = 1,988) were analyzed. Within-person association between changes in cannabis use and changes in mental distress in terms of symptoms of depression, anxiety, suicidal ideation, and deliberate self-harm were estimated by applying fixed-effects modeling. RESULTS: For males, an increase in cannabis use from no use to more than 10 times/year was significantly associated with increased risk for anxiety (relative risk [RR]: 1.72, p = .009), depressed mood (RR: 1.49, p < .001), and suicidal ideation (RR: 3.43, p = .012). For females, the corresponding increase in cannabis use yielded an increased risk for anxiety (RR: 1.38, p = .023) and suicidal ideation (RR: 2.47, p = .002). DISCUSSION: Increased cannabis use during adolescence and young adulthood seem to increase the risk for symptoms of mental distress. Although the associations appear to be more pronounced among males, it was only for depression that there was a statistically significant gender difference in the association.

The association between population drinking and ischemic heart disease mortality in educational groups.

A large number of observational studies have found a J-shaped relationship between alcohol intake and ischemic heart disease (IHD) risk. However, some studies suggest that the alleged cardio-protective effect may be an artifact in the way that the elevated risk for abstainers is due to self-selection on risk factors for IHD. The aim of this paper is to estimate the association between alcohol and IHD-mortality on the basis of aggregate time-series data, where the problem with selection effects is not present. In addition, we will analyze SES-specific mortality to investigate whether there is any socio-economic gradient in the relationship at issue. SES was measured by educational level. We used IHD-mortality in three educational groups as outcome. Per capita alcohol consumption was proxied by Systembolaget's alcohol sales (litres of alcohol 100% per capita 15+). Swedish quarterly data on mortality and alcohol consumption spanned the period 1991Q1-2020Q4. We applied SARIMA time-series analysis. Survey data were used to construct an indicator of heavy SES-specific episodic drinking. The estimated association between per capita consumption and IHD-mortality was positive and statistically significant in the two groups with primary and secondary education, but not in the group with postsecondary education. The association was significantly stronger the lower the educational group. Although the associations were generally stronger for males than for females, these differences were not statistically significant (P > 0.05). Our findings suggest that the detrimental impact of per capita consumption on IHD-mortality was stronger the lower the educational group.

The public-private decision for alcohol retail systems: Examining the economic, health, and social impacts of alternative systems in Finland.

Background: Organising alcohol retail systems with more or less public ownership has implications for health and the economy. The aim of the present study was to estimate the economic, health, and social impacts of alcohol use in Finland in 2018 (baseline), and in two alternative scenarios in which current partial public ownership of alcohol retail sales is either increased or fully privatised. Methods: Baseline alcohol-attributable harms and costs were estimated across five categories of death, disability, and criminal justice. Two alternate alcohol retail systems were defined as privately owned stores selling: (1) only low strength alcoholic beverages (public ownership scenario, similar to Sweden); or (2) all beverages (private ownership scenario). Policy analyses were conducted to estimate changes in alcohol use per capita. Health and economic impacts were modelled using administrative data and epidemiological modelling. Results: In Finland in 2018, alcohol use was estimated to be responsible for €1.51 billion (95% Uncertainty Estimates: €1.43 billion, €1.58 billion) in social cost, 3,846 deaths, and 270,652 criminal justice events. In the public ownership scenario, it was estimated that alcohol use would decline by 15.8% (11.8%, 19.7%) and social cost by €384.3 million (€189.5 million, €559.2 million). Full privatisation was associated with an increase in alcohol use of 9.0% (6.2%, 11.8%) and an increase in social cost of €289.7 million (€140.8 million, €439.5 million). Conclusion: The outcome from applying a novel analytical approach suggests that more public ownership of the alcohol retail system may lead to significant decreases in alcohol-caused death, disability, crime, and social costs. Conversely, full privatisation of the ownership model would lead to increased harm and costs.

Is there a link between all-cause mortality and economic fluctuations?

Background: All-cause mortality is a global indicator of the overall health of the population, and its relation to the macro economy is thus of vital interest. The main aim was to estimate the short-term and the long-term impact of macroeconomic change on all-cause mortality. Variations in the unemployment rate were used as indicator of temporary fluctuations in the economy. Methods: We used time-series data for 21 OECD countries spanning the period 1960-2018. We used four outcomes: total mortality (0+), infant mortality (<1), mortality in the age-group 20-64, and old-age mortality (65+). Data on GDP/capita were obtained from the Maddison Project. Unemployment data (% unemployed in the work force) were sourced from Eurostat. We applied error correction modelling to estimate the short-term and the long-term impact of macroeconomic change on all-cause mortality. Results: We found that increases in unemployment were statistically significantly associated with decreases in all mortality outcomes except old-age mortality. Increases in GDP were associated with significant lowering long-term effects on mortality. Conclusions: Our findings, based on data from predominantly affluent countries, suggest that an increase in unemployment leads to a decrease in all-cause mortality. However, economic growth, as indicated by increased GDP, has a long-term protective health impact as indexed by lowered mortality.

Drinking and acquisition of unrecorded alcohol across educational groups in Sweden.

INTRODUCTION: It is estimated that 18.5% of total alcohol consumption in Sweden in 2018 was unrecorded. However, little is known about the socio-economic profile of consumers of unrecorded alcohol. The aim of this study was to elucidate this issue by analysing data from a unique Swedish national repeated cross-sectional alcohol use survey. METHODS: Individual-level information on alcohol consumption and socio-economic status (SES) for the years 2013-2018 was retrieved from the Monitoring Project; a nationally representative monthly alcohol use survey. The analytical sample comprised 64 375 respondents aged 25-74 years. SES was measured by educational level. We used three educational groups: (i) low (<10 years); (ii) intermediate (10-12 years); and (iii) high (13+ years). We included indicators of the following sources of unrecorded alcohol consumption: travellers' import, smuggled alcohol, home production, internet and illicit home-distilling. We estimated adjusted SES-specific means of the various forms of unrecorded consumption. The means were adjusted for the effects of age, sex and region. RESULTS: There were no significant educational differences in the total of unrecorded alcohol consumption; the same holds true for home-production and internet. However, with respect to smuggled and home-distilling, a statistically significant educational gradient was observed with the lowest educational group scoring approximately four times higher than the highest. DISCUSSION AND CONCLUSIONS: Our findings suggest that there are no differences across educational groups in the consumption of unrecorded alcohol as a whole. However, consumption of smuggled alcohol and illicitly distilled spirits is elevated in the low educational group.

Is the theory of collectivity of drinking cultures valid across educational groups?

INTRODUCTION: To explore whether Skog's theory of collectivity of drinking cultures is valid across groups with different socioeconomic position (SEP). METHODS: Individual-level information on alcohol consumption and SEP for the years 2004-2014 were retrieved from the Monitoring Project; a nationally representative monthly alcohol use survey. The analytical sample consisted of 162 369 respondents aged 25-79 years. SEP was measured by education level. Alcohol use was measured by yearly volume of consumption and frequency of heavy episodic drinking (HED). Respondents were divided into six SEP-groups based on their education level and sex. Mean yearly volume consumption and prevalence of monthly HED was calculated for each group and graphically plotted against the overall mean volume of consumption. RESULTS: The yearly changes in overall mean consumption during the study period reflected a collective shift in drinking across groups with basic, intermediate and high education. There were also indications that changes in overall mean consumption reflected collective shifts in the prevalence of HED across the SEP-groups. Moreover, while the magnitude of the associations for both average volume and HED differed somewhat in strength across the SEP-groups, they were clearly in the same, positive, direction. DISCUSSION AND CONCLUSIONS: Our findings add support for including a socioeconomic dimension to Skog's theory of collectivity of drinking cultures. Future studies should replicate our analyses on cases and periods with more tangible changes in the price and availability of alcohol.

The Link Between Alcohol Sales and Alcohol-Related Harm in Finland, 1995-2016.

OBJECTIVE: A key assumption in Finnish alcohol policy is that the officially registered alcohol consumption (i.e., alcohol sales) is closely related to alcohol-related harm. During the last two decades, a sizable part of total alcohol consumption, however, comprises unrecorded consumption, which may potentially make alcohol sales less powerful as a predictor of alcohol-related harm. This article thus aims to estimate the relationship between alcohol sales and alcohol-related harm on the basis of more recent Finnish time-series data. METHOD: Data on alcohol sales (liters of 100% alcohol/capita age 15 years and older) were obtained from the National Institute for Health and Welfare in Finland. As indicators of harm, we used police-reported assaults and three forms of mortality: alcohol-specific mortality, accidents, and suicide. Quarterly data on mortality and alcohol sales spanned the period 1995-2016, and data on police-reported offenses covered the period 1990-2016. Data were analyzed by SARIMA (Seasonal Autoregressive Integrated Moving Average) modeling. RESULTS: A positive and significant association between alcohol sales and all harm indicators was found. A 1-L increase in alcohol sales per capita was associated with a 20% increase in alcohol-specific mortality, a 12% increase in assaults, and a 5%-6% increase in accidents and suicide. These estimates are in line with earlier findings estimated on data for the period when unrecorded alcohol consumption was less common in Finland. CONCLUSIONS: The results provide support for a continued strong relationship between alcohol sales and alcohol-related harm in Finland. Policy measures aimed at lowering alcohol sales were supported from these results.

The link between per capita alcohol consumption and alcohol-related harm in educational groups.

INTRODUCTION AND AIMS: Research based on individual-level data suggests that the same amount of alcohol yields more harm in low-socioeconomic status (SES) groups than in high-SES groups. Little is known whether the effect of changes in population-level alcohol consumption on harm rates differs by SES-groups. The aim of this study was to elucidate this issue by estimating the association between per capita alcohol consumption and SES-specific rates of alcohol-related mortality. DESIGN AND METHODS: Per capita alcohol consumption was proxied by Systembolaget's alcohol sales (litres 100% alcohol per capita 15+). Quarterly data on mortality and alcohol consumption spanned the period 1991Q1-2017Q4. We used two outcomes: (i) alcohol-specific mortality (deaths with an explicit alcohol diagnosis); and (ii) violent deaths. SES was measured by education. We used three educational groups: (i) low (<10 years); (ii): intermediate (10-12 years); and (iii) high (13+ years). We applied error correction modelling to estimate the association between alcohol and alcohol-specific mortality, and seasonal autoregressive integrated moving average-modelling to estimate the association between alcohol and violent deaths. RESULTS: The estimated associations between per capita consumption and the two outcomes were positive and statistically significant in the two groups with low and intermediate education, but not in the high education group. There was a significant gradient in the level of association between alcohol consumption and alcohol-related harm by educational group; the association was stronger the lower the educational group. DISCUSSION AND CONCLUSIONS: Our findings suggest that the association between per capita consumption and alcohol-related harm was stronger the lower the educational group.

Effects of Local Alcohol Prevention Initiatives in Swedish Municipalities, 2006-2014.

Background: Several components of the Swedish alcohol policy, e.g., pricing and availability, weakened when Sweden joined the EU in 1995. To counteract the possible negative effects of this, emphasis was placed on the local level as an important arena of alcohol prevention. Thus, considerable efforts were made to strengthen alcohol prevention in Swedish municipalities. Objectives: The aim of this study was to examine whether local alcohol prevention reduced consumption and alcohol-related harm in Swedish municipalities. Methods: Alcohol prevention was monitored using a composite measure called the Alcohol Prevention Magnitude Measure (APMM), with subcategories of staff and budget, inspections and licenses, policy, activities, and cooperation. APMM and its categories were analysed in relation to alcohol consumption and harm over time, 2006-2014. A fixed effects model was used with 63% (N=182, consumption) and 71% (N=207, harm) of 290 Swedish municipalities, respectively, included in the analyses. Results: The main results suggest that when APMM increases with 1 percent, the alcohol-related mortality decreases with 0.26 percent, controlled for changes in population size, median income, unemployment, and post-secondary education. In light of this result, the estimated effect of APMM on alcohol consumption (sales) is small (0.02 percent decrease); possible explanations for this are discussed in the article. Conclusion: The overall results indicate that local alcohol prevention initiatives in Sweden have reduced some forms of alcohol-related harm, not least alcohol-related mortality, during the period 2006-2014. Further studies are needed to assess the generalizability of the present study.

Is there a link between cardiovascular mortality and economic fluctuations?

Background: Unemployment might affect several risk factors of cardiovascular disease (CVD), which is the leading cause of death globally. The characterisation of the relation between these two phenomena is thus of great significance from a public-health perspective. The main aim of this study was to estimate the association between the unemployment rate and mortality from CVD and from coronary heart disease (CHD). Additional aims were (a) to assess whether the associations are modified by the degree of unemployment protection; (b) to determine the impact of GDP on heart-disease mortality; and (c) to assess the impact of the Great Recession in this context. Methods: We used time-series data for 32 countries spanning the period 1960-2015. We applied two alternative modelling strategies: (a) error correction modelling, provided that the data were co-integrated; and (b) first-difference modelling in the absence of co-integration. Separate models were estimated for each of five welfare state regimes with different levels of unemployment protection. We also performed country-specific ARIMA-analyses. Results: Because the data did not prove to be co-integrated, we applied first-difference modelling. The estimated effect of unemployment and GDP on CVD as well as CHD was statistically insignificant across age and sex groups and across the various welfare state regimes. An interaction term capturing the possible excess effect of unemployment during the Great Recession was also statistically insignificant. Conclusions: Our findings, based on data from predominantly affluent countries, suggest that heart-disease mortality does not respond to economic fluctuations.

The connection between per capita alcohol consumption and alcohol-specific mortality accounting for unrecorded alcohol consumption: The case of Finland 1975-2015.

INTRODUCTION AND AIMS: Unrecorded alcohol consumption has increased strongly in Finland after 1995 when the country joined the European Union. This development may have rendered alcohol sales less trustworthy as a proxy for population drinking, and less powerful as predictor of alcohol-related harm. The study aims to test this contention by analyzing the association between recorded and unrecorded alcohol consumption on the one hand, and alcohol-specific mortality on the other. DESIGN AND METHODS: We analysed age-standardised rates of alcohol-specific deaths for the working-age (15-64 years) population. For alcohol consumption, we used (i) alcohol sales in litres of 100% alcohol per capita, and (ii) estimated unrecorded consumption in litres of 100% alcohol per capita. The data spanned the period 1975-2015. As the data were cointegrated, the relations between mortality and the alcohol indicators were estimated through time-series analysis of the raw data. RESULTS: A one litre increase in alcohol sales was associated with an increase in alcohol-specific deaths of 7.590 deaths per 100 000; the corresponding figure for unrecorded consumption was 9.112 deaths per 100 000. Both estimates were statistically significant (P < 0.001), but the difference between them was not significant (P = 0.293). Although recoded consumption captured the main feature of the trends in alcohol-specific mortality, it accounted for only half of its marked increase in 1975-2007, while unrecorded consumption explained the remaining part. DISCUSSION AND CONCLUSIONS: Our study confirms previous findings that recorded alcohol consumption is an important determinant of alcohol-specific mortality in Finland. A more novel insight is the importance of unrecorded consumption in this context.

Estimating the public health impact of disbanding a government alcohol monopoly: application of new methods to the case of Sweden.

BACKGROUND: Government alcohol monopolies were created in North America and Scandinavia to limit health and social problems. The Swedish monopoly, Systembolaget, reports to a health ministry and controls the sale of all alcoholic beverages with > 3.5% alcohol/volume for off-premise consumption, within a public health mandate. Elsewhere, alcohol monopolies are being dismantled with evidence of increased consumption and harms. We describe innovative modelling techniques to estimate health outcomes in scenarios involving Systembolaget being replaced by 1) privately owned liquor stores, or 2) alcohol sales in grocery stores. The methods employed can be applied in other jurisdictions and for other policy changes. METHODS: Impacts of the privatisation scenarios on pricing, outlet density, trading hours, advertising and marketing were estimated based on Swedish expert opinion and published evidence. Systematic reviews were conducted to estimate impacts on alcohol consumption in each scenario. Two methods were applied to estimate harm impacts: (i) alcohol attributable morbidity and mortality were estimated utilising the International Model of Alcohol Harms and Policies (InterMAHP); (ii) ARIMA methods to estimate the relationship between per capita alcohol consumption and specific types of alcohol-related mortality and crime. RESULTS: Replacing government stores with private liquor stores (Scenario 1) led to a 20.0% (95% CI, 15.3-24.7) increase in per capita consumption. Replacement with grocery stores (Scenario 2) led to a 31.2% (25.1-37.3%) increase. With InterMAHP there were 763 or + 47% (35-59%) and 1234 or + 76% (60-92%) more deaths per year, for Scenarios 1 and 2 respectively. With ARIMA, there were 850 (334-1444) more deaths per year in Scenario 1 and 1418 more in Scenario 2 (543-2505). InterMAHP also estimated 10,859 or + 29% (22-34%) and 16,118 or + 42% (35-49%) additional hospital stays per year respectively. CONCLUSIONS: There would be substantial adverse consequences for public health and safety were Systembolaget to be privatised. We demonstrate a new combined approach for estimating the impact of alcohol policies on consumption and, using two alternative methods, alcohol-attributable harm. This approach could be readily adapted to other policies and settings. We note the limitation that some significant sources of uncertainty in the estimates of harm impacts were not modelled.

The Link Between Per Capita Alcohol Consumption and Alcohol-Related Harm in Sweden, 1987-2015.

OBJECTIVE: Recent studies have suggested a weakening of the relationship between population drinking and harm in Sweden. The aim of the present article was to estimate this association on the basis of more recent Swedish time-series data. METHOD: The Swedish state monopoly's (Systembolaget) alcohol sales were used as a proxy for population drinking, expressed in liters 100% alcohol per capita ages 15 and older. As indicators of harm we used mortality (cirrhosis mortality, accidents, and suicide), police-reported assaults, and drink driving. Quarterly data on mortality and alcohol consumption spanned the period 1987Q1-2015Q1, and the data on police-reported offenses covered the period 1995Q1-2015Q1. Data were analyzed by applying the technique of seasonal autoregressive integrated moving average (SARIMA) modeling. RESULTS: We found a positive and statistically significant association between population drinking and all harm indicators. A 1 L increase in per capita consumption was associated with a 19% increase in cirrhosis mortality and a 17% increase in drink driving. The effects on the other harm rates were estimated to be between 11% and 13%. These estimates are in line with earlier findings except the estimate for cirrhosis, which was weaker and now similar to findings for other countries. CONCLUSIONS: The results provide continuing support for a strong relationship between population drinking and alcohol-related harm in Sweden. Policy measures aimed at lowering the level of drinking gained support from these results.

Extended opening hours at nightclubs in Visby: An evaluation of a trial in the summer of 2014.

BACKGROUND AND AIMS: During 10 weeks in the summer 2014 opening hours in nightclubs in Visby (Sweden) were extended by 1 hour, postponing the permitted closing time from 2 to 3 a.m. A number of preventive efforts such as Responsible Server Training, and an intensified cooperation between the police and the nightclubs were strengthened in connection with the trial. The aim of this study was to evaluate the impact of this trial on police-reported violence. DATA AND METHODS: To estimate the effect of the trial on violence, we compared the violence rate during the intervention period (week 24-week 33, 2014) with the violence rate in the corresponding period in Visby in 2010-2013. The intervention period thus comprised 10 weeks, and the pre-intervention period 40 weeks. As outcome measure we chose police-reported assaults that had occurred at night (midnight-6 a.m.). As control series we used assaults daytime (6 a.m.-midnight). The intervention effect was estimated with the method of "difference in differences" (DiD). Interviews with key informants provided the study with an explanatory context for the trial outcomes. RESULTS: The intervention effect was strongly statistically significant with a reduction of 3.336 reported assaults at night per week compared to the pre-intervention period. This represents a decrease of 71%. CONCLUSION: The trial with an extension of opening hours at nightclubs in Visby was followed by a reduction in police-reported violence. This unexpected outcome is likely to be the result of (i) the simultaneous strengthening of efficient preventive measures, and (ii) a decreased congestion in the streets resulting from increased spread in closing hours.

Alcohol Consumption and the Physical Availability of Take-Away Alcohol: Systematic Reviews and Meta-Analyses of the Days and Hours of Sale and Outlet Density.

OBJECTIVE: Systematic reviews and meta-analyses were completed studying the effect of changes in the physical availability of take-away alcohol on per capita alcohol consumption. Previous reviews examining this topic have not focused on off-premise outlets where take-away alcohol is sold and have not completed meta-analyses. METHOD: Systematic reviews were conducted separately for policies affecting the temporal availability (days and hours of sale) and spatial availability (outlet density) of take-away alcohol. Studies were included up to December 2015. Quality criteria were used to select articles that studied the effect of changes in these policies on alcohol consumption with a focus on natural experiments. Random-effects meta-analyses were applied to produce the estimated effect of an additional day of sale on total and beverage-specific consumption. RESULTS: Separate systematic reviews identified seven studies regarding days and hours of sale and four studies regarding density. The majority of articles included in these systematic reviews, for days/hours of sale (7/7) and outlet density (3/4), concluded that restricting the physical availability of take-away alcohol reduces per capita alcohol consumption. Meta-analyses studying the effect of adding one additional day of sale found that this was associated with per capita consumption increases of 3.4% (95% CI [2.7, 4.1]) for total alcohol, 5.3% (95% CI [3.2, 7.4]) for beer, 2.6% (95% CI [1.8, 3.5]) for wine, and 2.6% (95% CI [2.1, 3.2]) for spirits. The small number of included studies regarding hours of sale and density precluded meta-analysis. CONCLUSIONS: The results of this study suggest that decreasing the physical availability of take-away alcohol will decrease per capita consumption. As decreasing per capita consumption has been shown to reduce alcohol-related harm, restricting the physical availability of take-away alcohol would be expected to result in improvements to public health.

Social Class and Alcohol Use by Youth: Different Drinking Behaviors, Different Associations?

OBJECTIVE: Low socioeconomic status (SES) is related to hazardous alcohol use in adults, and the association seems to be stronger for more deviant and harmful drinking behaviors. We examined whether a similar pattern was present among adolescents. METHOD: Data stem from a Norwegian school survey of 14- to 17-year-olds (n = 12,966; response rate in participating schools: 86%). Parental education (high/ middle vs. low) was our main SES indicator. The outcomes comprised lifetime and past-year drinking and intoxication, and past-year symptoms of excessive drinking. We used Poisson regression to estimate relative risks (RR) and post-estimation Wald F tests to compare coefficient estimates. RESULTS: Parental education was related inversely to the lifetime measures of drinking and intoxication among all students but the 17-year-olds. The impact on any intoxication episodes was significantly stronger than that on any alcohol use only among the 14-year-olds (RR = 1.79, 95% CI [1.31, 2.43] vs. RR = 1.21, 95% CI [0.98, 1.49]) (p < .001). Among past-year drinkers at all ages (14-17 years; n = 7,796), the differential impact of low parental education was particularly large with respect to the frequency of intoxication (RR = 1.68, 95% CI [1.39, 2.02]) compared with the frequency of drinking (RR = 1.42, 95% CI [1.24, 1.62]) (p < .001) and frequent symptoms of excessive drinking (RR = 1.80, 95% CI [1.47, 2.20]) compared with any symptoms (RR = 1.07, 95% CI [1.01, 1.14]) (p < .001). A similar but somewhat less clear pattern emerged when using an alternative indicator for low parental SES. CONCLUSIONS: Parents' social standing was inversely related to alcohol use by youth and related more strongly so to more deviant and harmful drinking behaviors.

Social inequality in youth violence: The role of heavy episodic drinking.

INTRODUCTION AND AIMS: Alcohol use is an important risk factor for violence, and violent behaviour is more prevalent in lower socioeconomic status (SES) groups. The aim of this study was to examine whether the SES difference in youth violence can be explained by differential exposure to-and/or differential vulnerability to-heavy episodic drinking (HED). In the latter case, effect modification by impulsivity could be assumed. DESIGN AND METHODS: We analysed cross-sectional data from a school survey of 15- to 17-year-olds in Norway (n = 9853). We employed two measures of low-SES group. Associations between SES, HED and violence were estimated by Poisson regressions, applying a residual centring procedure to test effect modification. RESULTS: Violent behaviour frequency, HED frequency and impulsivity scores were all elevated in the low-SES group. The SES difference in violent behaviour was significantly reduced when adjusting for HED. The stronger association between HED and violence in the low, compared with the medium-SES/high-SES group, was modified when accounting for impulsivity. Sensitivity analyses suggested robust findings. DISCUSSION AND CONCLUSIONS: The findings lend support to both the differential exposure hypothesis and to the differential vulnerability hypothesis as well as the hypothesis of an enhancing effect of impulsivity on the HED-violence association. The SES difference in youth violence can be accounted for by: (i) an elevated prevalence of HED in low-SES groups; and (ii) a stronger than average link between HED and violence in low-SES groups due to their higher than average impulsivity score. [Norström T, Rossow I, Pape H. Social inequality in youth violence: The role of heavy episodic drinking. Drug Alcohol Rev 2017;00:000-000].

Latent developmental trajectories of episodic heavy drinking from adolescence to early adulthood: Predictors of trajectory groups and alcohol problems in early adulthood as outcome.

INTRODUCTION AND AIMS: To identify latent developmental episodic heavy drinking (EHD) trajectory groups for Norwegian adolescents, investigate risk factors associated with group membership and to assess differences in alcohol problems between different groups in early adulthood. DESIGN AND METHODS: Data were from 1266 individuals measured at four time points from age 13/14 years to age 26/27 years. Latent class growth analysis was used to identify groups with different EHD development. Multinomial logistic regression was used to investigated if gender, impulsivity, school commitment, parents' socio-economic status, frequency of seeing parents drunk and parental knowledge could predict group membership. Differences in alcohol problem scores at age 26/27 were also assessed. RESULTS: Four trajectory groups were identified: 'stable high', 'early increasers', 'late increasers' and 'stable low'. Membership of the high-risk trajectory groups 'stable high' and 'early increasers' was predicted by high impulsivity, low school commitment, high frequency of seeing parents drunk and low parental knowledge. The risk of alcohol problems at age 26/27 was greater for the 'stable high' group, the 'early increasers' and the 'late increasers' compared with the 'stable low' group. The 'stable high' and 'early increasers' had similar risk of alcohol problems. DISCUSSION AND CONCLUSIONS: Stable high and early increasing EHD in adolescence was associated with more alcohol problems in early adulthood. Such trajectories were predicted by high impulsivity, low school commitment, high frequency of seeing parents drunk and low parental knowledge. [Brunborg GS, Norström T, Storvoll EE. Latent developmental trajectories of episodic heavy drinking from adolescence to early adulthood: Predictors of trajectory groups and alcohol problems in early adulthood as outcome.