Transitions to polysubstance use: Prospective cohort study of adolescents in Australia

BACKGROUND AND AIMS

Adolescent polysubstance use has been associated with adverse social and health outcomes. Our aim was to measure rates and transitions to polysubstance use during adolescence and identify factors associated with initiation and discontinuation of polysubstance use.

DESIGN

Prospective cohort study. Multistate Markov modelling was used to estimate rates and identify correlates of transitions between substance use states.

SETTING AND PARTICIPANTS

Adolescent-parent dyads (n = 1927; adolescents in grade 7, age ≈13 years) were recruited from Australian schools during 2010/11 (Wave 1). Adolescents were surveyed annually until 2016/17 (n = 1503; age ≈19 years; Wave 7) and parents were surveyed annually until 2014/15 (Wave 5).

MEASUREMENTS

Alcohol, tobacco, cannabis and 3,4-methylenedioxymethamphetamine (MDMA) use outcomes were collected at Waves 3-7. Potential confounders were collected at Waves 1-6 and consisted of sex, anxiety and depression symptoms and externalizing problems, parental monitoring, family conflict and cohesion, parental substance use and peer substance use. Covariates were age and family socioeconomic status.

FINDINGS

Few adolescents engaged in polysubstance use at earlier waves (Wave 3: 5%; Wave 4: 8%), but proportions increased sharply across adolescence (Waves 5-7: 17%, 24%, 36%). Rates of transitioning to polysubstance use increased with age, with few (<9%) adolescents transitioning out. More externalizing problems (odds ratio [OR] = 1.10; 99.6% confidence interval [CI] = 1.07-1.14), parental heavy episodic drinking (OR = 1.22; 99.6% CI = 1.07-1.40), parental illicit substance use (OR = 3.56; 99.6% CI = 1.43-8.86), peer alcohol use (OR = 5.68; 99.6% CI = 1.59-20.50) and peer smoking (OR = 4.18; 99.6% CI = 1.95-8.81) were associated with transitioning to polysubstance use.

CONCLUSIONS

Polysubstance use in Australia appears to be rare during early adolescence but more common in later adolescence with low rates of transitioning out. Externalizing problems and greater parental and peer substance use are risk factors for adolescent polysubstance use that may be suitable intervention targets.

Changes in mental health and help-seeking among young Australian adults during the COVID-19 pandemic: a prospective cohort study

BACKGROUND

Young people may have elevated risk for poorer mental health during the coronavirus disease 2019 (COVID-19) pandemic, yet longitudinal studies documenting this impact are lacking. This study assessed changes in mental health and help-seeking since COVID-19 restrictions in young Australians, including gender differences.

METHODS

Data were drawn from a recent subsample (n = 443; 60% female; Mage = 22.0) of a prospective cohort originally recruited in secondary school to complete annual surveys. The subsample completed an additional COVID-19 survey during COVID-19 restrictions (May-June 2020), which was compared to responses from their latest annual survey (August 2019-March 2020). Mixed effect models with time and gender as the primary predictors were conducted for: (i) scores on the Patient Health Questionnaire Depression 9-item (PHQ-9) and Generalised Anxiety Disorder 7-item (GAD-7) modules assessed before and during COVID-19 restrictions, and (ii) self-reported help-seeking from a health professional in February 2020, and the month preceding May-June 2020.

RESULTS

Mean symptom scores increased from before to during COVID-19 restrictions on the PHQ-9 (coefficient: 1.29; 95% CI 0.72-1.86) and GAD-7 (0.78; 95% CI 0.26-1.31), but there was no increase in help-seeking over time (odds ratio 0.50; 95% CI 0.19-1.32). There was no evidence of differential changes by gender.

CONCLUSIONS

This study found increases in depression and anxiety symptoms but not greater help-seeking among young Australian adults during the first wave of the pandemic. Increasing availability and awareness of accessible treatment options and psychoeducation is critical, as well as further research into risk and protective factors to help target treatment to this vulnerable age group.

Effectiveness, safety and cost-effectiveness of vaporized nicotine products versus nicotine replacement therapy for tobacco smoking cessation in a low-socioeconomic status Australian population: a study protocol for a randomized controlled trial

Background

In Australia, tobacco smoking rates have declined but inequalities remain with significantly higher smoking prevalence among low-socioeconomic populations. Clinical trial data suggest vaporized nicotine products (VNPs) aid smoking cessation. Most VNP trials have used refillable tank systems, but newer generation (pod) devices now comprise the largest market share yet have limited clinical trial evidence on safety and effectiveness. This study evaluates the effectiveness, safety and cost-effectiveness of VNPs (pod and tank device) compared with nicotine replacement therapy ([NRT]—gum or lozenge) for smoking cessation.

Methods

This is a two-arm, open-label, superiority, parallel group, randomized controlled trial (RCT) with allocation concealment and blinded outcome assessment. The RCT is conducted at the National Drug and Alcohol Research Centre at the University of New South Wales, Sydney, Australia. Participants are people who smoke daily, are interested in quitting and receive a government pension or allowance (N = 1058). Participants will be randomized (1:1 ratio) to receive 8 weeks of free: VNPs, with pod (40 mg/mL nicotine salt) and tank device (18 mg/mL freebase nicotine) in mixed flavours; or NRT (gum or lozenge; 4 mg). All participants will receive daily text message behavioural support for 5 weeks. Assessments will be undertaken by telephone at baseline, with three follow-up calls (two check-in calls within the first month and final follow-up at 7 months post randomization) to ascertain smoking status, treatment adherence and adverse events. The primary outcome is 6-month continuous abstinence verified by carbon monoxide breath test of ≤5ppm at 7-month follow-up. Safety and cost-effectiveness of VNPs versus NRT will also be evaluated.

Discussion

Further data are required to strengthen certainty of evidence for VNPs aiding smoking cessation, particularly for newer generation pod devices. To our knowledge, this trial is the first to offer choice of VNPs and no comparative effectiveness trial data exists for new pod devices. If effective, the findings can inform wider implementation of VNPs to aid smoking cessation in a priority group.

Trial registration

Australian New Zealand Clinical Trials Registry ACTRN12621000076875. Registered on 29 January 2021. https://www.anzctr.org.au

Supplementary Information

The online version contains supplementary material available at 10.1186/s13063-022-06644-8.

Trajectories of parental and peer supply of alcohol in adolescence and associations with later alcohol consumption and harms: A prospective cohort study

BACKGROUND

Supply of alcohol to adolescents is associated with increased alcohol consumption and harms including alcohol use disorder (AUD). We aimed to identify: (1) trajectories of alcohol supply to adolescents; (2) sociodemographic characteristics associated with supply trajectory; (3) patterns of alcohol consumption by supply trajectory; and (4) supply trajectory associations with adverse alcohol outcomes.

METHODS

We used Australian longitudinal survey data (N = 1813) to model latent trajectories of parent and peer alcohol supply over five annual follow-ups (Waves 2-6; M_age 13.9-17.8 years). Regression models assessed associations between supply trajectories and Wave 1 (M_age=12.9 years) sociodemographic factors and associations between supply trajectories and Wave 7 (M_age=18.8 years) alcohol outcomes.

RESULTS

We identified five alcohol supply classes: (1) minimal supply (n = 739, 40.8%); (2) early parent sips, late peer/parent whole drinks (n = 254, 14.0%); (3) late peer/parent whole drinks (n = 419, 23.1%); (4) early parent sips, mid peer/parent whole drinks (n = 293, 16.2%); (5) early peer/parent whole drinks (n = 108, 6.0%). Compared to minimal supply, the other classes were 2.7-12.9 times as likely to binge drink, 1.6-3.0 times as likely to experience alcohol-related harms, and 2.1-8.6 times as likely to report AUD symptoms at age 19.

CONCLUSION

Earlier supply of whole drinks, particularly from peers, was associated with increased risk of early adulthood adverse alcohol outcomes. While minimal supply represented the lowest risk, supplying sips only in early-mid adolescence and delaying supply of whole drinks until late adolescence is likely to be less risky than earlier supply of whole drinks.

P16 Strengthening surveillance systems for antimicrobial resistance in urinary tract infections in Kenya

Background

Urinary tract infections (UTIs) are amongst the most common conditions leading to outpatient visits and are also one of the most common causes of inappropriate antibiotic usage. Addressing antimicrobial resistance (AMR) requires strengthening surveillance system in Kenya where UTI is a problem with health systems having limited capacity for accurate laboratory identification of UTI pathogens. Empirical treatment to manage UTIs is the most common problem due to limited microbiology capacity. These include shortages of suitable training, equipment, quality control procedures and professional expertise to make an accurate clinical interpretation of urine cultures. This leads to reporting normal flora as pathogens.

Objectives

To deliver training on the identification and antibiotic susceptibility testing of bacterial isolates from urine infections at participating hospitals in the Kenyan AMR surveillance network and measure competency levels in staff participating in the training with the aim of strengthening the Kenyan surveillance system.

Methods

A 1 day baseline visit to the five sites was made between October and November 2021 using a standardized checklist to assess laboratory capacity. This was followed by urine processing training conducted between November 2021 and January 2022 in Malindi, Jaramogi, Kitale, Nakuru and Nyeri County Hospitals. Training materials were developed with the input of Aga Khan University Hospital. A 5 day in-person training course was delivered at each of the five hospitals, which targeted an average of 2–3 laboratory staff per hospital. The competencies of the laboratory staff were assessed by written pre-assessment and post-assessment tests. A standardized practical assessment was achieved by use of five different control organisms. The scores were done by doing an average performance score at each hospital laboratory.

Results

Out of 13 trainees, 8 were male and 5 were female. The median number of years since qualification for these staff was 6 (IQR 2–9). The median number of total months of microbiology training time was 2.3 (IQR 1–7). The median pre-training and post-training scores were 46% and 90%, respectively; non-parametric Wilcoxon rank test showed statistical difference (P < 0.0001) between pre-training and post-training. All participants improved from pre-to post- training assessment from the 5 day training with marked improvement amongst from staff with lowest previous level of laboratory training.

Conclusions

Training microbiology staff in the accurate processing of urine sample will be an important activity for a Kenyan AMR surveillance system. These training materials, if delivered by an experienced trainer, can achieve a clear improvement in knowledge levels and practical competence for real-life microbiology identifications.

The experience of physiological and psychosocial alcohol-related harms across adolescence and its association with alcohol use disorder in early adulthood: A prospective cohort study

BACKGROUND

Different forms of alcohol-related harm (e.g., hangovers, fighting) may confer differential risk of clinically relevant alcohol problems. We examine: (i) patterns of transition in experiencing alcohol-related harms across adolescence; (ii) whether factors in early adolescence predict transition patterns; and (iii) whether transition patterns predict later alcohol use disorder (AUD) symptoms.

METHODS

We used a longitudinal Australian cohort (n = 1828) to model latent class transition patterns of alcohol-related harms across three timepoints (M_age  = 13.9, 16.8, 18.8 years). Regression models assessed whether child, peer, and parent factors in early adolescence (M_age  = 12.9) predicted harms transition patterns and whether these patterns predicted AUD symptoms in early adulthood (M_age  = 19.8).

RESULTS

Five transition patterns characterized most of the cohort (n ≈ 1609, 88.0%): (i) minimal harms (n ≈ 381, 20.8%); (ii) late physiological harms (n ≈ 702, 38.4%); (iii) early physiological harms (n ≈ 226, 12.4%); (iv) late all harms (n ≈ 131, 7.2%); and (v) gradual all harms (n ≈ 169, 9.2%). With late physiological harms as the reference, females had increased risk of experiencing early physiological harms (relative risk [RR]: 2.15; 99.5% CI: 1.19, 3.90). Late all harms (RR: 1.71; CI: 1.19, 2.47) and gradual all harms (RR: 1.84; CI: 1.37, 2.47) were each associated with increased odds of meeting criteria for AUD, even when patterns of alcohol consumption are considered.

CONCLUSIONS

Adolescents display heterogeneous transition patterns across physiological and psychosocial alcohol-related harms. Females are at greater risk of experiencing early physiological harms. Experience of both physiological and psychosocial harms in late adolescence is an important and potentially modifiable precursor to clinically relevant alcohol problems in early adulthood.

Alcohol use among young Australian adults in May-June 2020 during the COVID-19 pandemic: a prospective cohort study

AIMS

To estimate change in young people's alcohol consumption during COVID-19 restrictions in Australia in early-mid 2020, and test whether those changes were consistent by gender and level of consumption prior to the pandemic.

DESIGN

Prospective longitudinal cohort.

SETTING

Secondary schools in New South Wales, Tasmania and Western Australia.

PARTICIPANTS

Subsample of a cohort (n = 443) recruited in the first year of secondary school in 2010-11. Analysis data included three waves collected in September 2017-July 2018, September 2018-May 2019 and August 2019-January 2020), and in May-June 2020.

MEASUREMENTS

The primary predictors were time, gender and level of consumption prior to the pandemic. Outcome variables, analysed by mixed-effects models, included frequency and typical quantity of alcohol consumption, binge drinking, peak consumption, alcohol-related harm and drinking contexts.

FINDINGS

Overall consumption (frequency × quantity) during the restrictions declined by 17% [incidence rate ratio (IRR) = 0.83; 95% confidence interval (CI) = 0.73, 0.95] compared to February 2020, and there was a 35% decline in the rate of alcohol-related harms in the same period (IRR = 0.66; 95% CI = 0.54, 0.79). Changes in alcohol consumption were largely consistent by gender.

CONCLUSIONS

From a survey of secondary school students in Australia, there is evidence for a reduction in overall consumption and related harms during the COVID-19 restrictions.

962Adolescent Alcohol Use Trajectories: A Prospective Study of Risk Factors and Adulthood AUD Outcomes

Background

Adolescents often display heterogenous trajectories of alcohol use. Initiation and escalation of drinking may be an important predictor of later harms. Previous attempts to conceptualise these trajectories lacked adjustment for known confounders of adolescent drinking, which our study has aimed to address by modelling dynamic changes in drinking whilst adjusting for parent, child, and peer factors.

Methods

Survey data from a longitudinal cohort of Australian adolescents (n = 1813) were used to model latent class alcohol use trajectories over five annual follow-ups (Mage=13.9 and 17.8 years). Regression models determined whether child, parent, and peer factors at baseline (Mage =12.9 years) predicted trajectory membership and whether trajectories predicted self-reported symptoms of AUD in early adulthood (Mage =18.8 years).

Results

We identified a four-class solution: abstaining (n = 352); late-onset moderate drinking (n = 503); early-onset moderate drinking (n = 663); and early-onset heavy drinking (n = 295). Alcohol-specific household rules reduced risk of early-onset heavy drinking compared to late-onset moderate drinking (RRR: 0.31; 99.5% CI: 0.11, 0.83), whereas substance-using peers increased this risk (RRR: 3.43; 99.5% CI: 2.10, 5.62). Early-onset heavy drinking increased odds of meeting criteria for AUD in early adulthood (OR: 7.68; 99.5% CI: 2.41, 24.47).

Conclusions

Our study provides evidence that early initiation and heavy alcohol use throughout adolescence is associated with increased risk of alcohol-related harm compared to recommended maximum levels of consumption (late-onset, moderate drinking).

Key messages

Parenting factors and peer influences in early adolescence should be considered to reduce risk of early initiation and heavy drinking, which in turn reduces risk of later harm.

Gender differences in the supply of alcohol to adolescent daughters and sons

Background: Parents are the main supplier of alcohol to children but it is not known whether mothers and fathers equally contribute to the supply of alcohol to their female and male children as these children transition to adulthood.Objectives: i) to determine whether the gender of the parent is associated with the gender of the adolescent offspring when alcohol is supplied and ii) whether the gender of the parent supplying is associated with gender differences in adolescent binge drinking and alcohol related harms.Methods: Longitudinal cohort of 1,927 (males = 1052) Australian adolescents (mean age 12.9 years), recruited in 2010/11 from schools in Australia and surveyed annually for six years. We assessed the association between adolescent and parent gender related to subsequent adolescent drinking, binge drinking (>4 standard drinks), and alcohol-related harms.Results: At mean age of 12.9 years about one in ten children report parental supply of alcohol which increases to about four in ten children by 17.8 years. Mothers consistently more often supply their daughters with alcohol than their sons, [Wave 5 OR 1.77 (1.53,2.05)], while mothers less often supply sons than their daughters, [Wave 5 OR 0.82 (0.71,0.95)]. Mothers' supply of alcohol to daughters predicts substantially increased odds of daughters binge drinking, [OR 1.67 (1.10,2.53)] and experiencing alcohol related harms, [OR 1.65 (1.10,2.48)].Conclusion: There is a need to involve both mothers and fathers and to equally target female and male children in programs to reduce the harmful consequences of parental supply of alcohol to their children.

Trajectories of alcohol-induced blackouts in adolescence: early risk factors and alcohol use disorder outcomes in early adulthood

BACKGROUND AND AIMS

Experience of alcohol-induced memory blackouts in adolescence may be an important risk factor for later harms. This longitudinal study (i) modelled trajectories of alcohol-related blackouts throughout adolescence, (ii) explored early-adolescent predictors of blackout trajectories and (iii) examined the association between blackout trajectories and alcohol use disorder (AUD) symptoms.

DESIGN

Longitudinal study in which data from six annual surveys of a longitudinal cohort of Australian adolescents were used to model latent class growth trajectories of blackouts, adjusting for alcohol consumption frequency and typical quantity. Regression models were used to determine whether parent, child and peer factors at baseline (mean age = 12.9) predicted profiles of blackout trajectory membership and whether blackout trajectories predicted meeting criteria for AUD in early adulthood (mean age = 19.8).

SETTING AND PARTICIPANTS

Australian adolescents (n = 1821; mean age = 13.9-18.8 years).

MEASUREMENTS

Alcohol-related blackouts, alcohol consumption frequency, typical consumption quantity and DSM-5 AUD in early adulthood were all self-reported.

FINDINGS

We identified a three-class solution: delayed alcohol initiation, rare blackouts (n = 701; 38.5%); early initiation, rare blackouts (n = 869; 47.7%); and early initiation, increasing blackouts (n = 251; 13.8%). Female sex was associated with increased risk of early initiation, increasing blackouts relative to delayed initiation, rare blackouts [relative risk ratio (RRR) = 3.90; 99.5% confidence interval (CI) = 1.96, 7.76] and relative to early initiation, rare blackouts (RRR = 2.89; 99.5% CI = 1.42, 5.87). Early initiation, rare blackouts [odds ratio (OR) = 1.96; 99.5% CI = 1.17, 3.29] and early initiation, increasing blackouts (OR = 4.93; 99.5% CI = 2.32, 10.48) were each associated with increased odds of meeting criteria for AUD in early adulthood relative to delayed initiation, rare blackouts. Early initiation, increasing blackouts was associated with increased odds of meeting criteria for AUD in early adulthood relative to early initiation, rare blackouts (OR = 2.51; 99.5% CI = 1.18, 5.38).

CONCLUSIONS

Females in Australia appear to be at higher risk of adolescent alcohol-related blackouts independent of alcohol consumption levels and age of initiation. Alcohol-related blackouts may be associated with later alcohol use disorder.

Disclosures of harming others during their most recent drinking session: Findings from a large national study of heavy-drinking adolescents

INTRODUCTION

The extant Alcohol's Harms to Others (AHTO) literature is largely comprised of reports from victims. We investigated AHTO from perpetrators' perspectives, including how harms were associated with individual characteristics, and alcohol quantities consumed during the perpetration incident.

METHODS

Participants (N = 2932) were 14-19 years old, recruited primarily through social media and screened as risky drinkers. They completed face-to-face (n = 594) or self-administered (n = 2338) surveys. They self-reported whether during their last risky drinking session (LRDS) they had perpetrated any verbal abuse, physical abuse or property damage. A multinomial logistic regression examined whether nine factors were associated with perpetrating zero, one or 2+ categories of AHTO.

RESULTS

Eleven percent (n = 323) reported perpetrating at least one form of AHTO (7.5% verbal, 1.9% physical and 4.6% property). Perpetration of AHTO at LRDS was uniquely associated with: younger age, male gender, experiences of childhood physical punishment, greater perpetration incident-specific drinking, concurrent illicit drug use, and less frequent use of safety strategies while drinking in the past 12 months. Controlling for the other variables, an increase of six Australian standard drinks (60 g of alcohol) increased the odds of perpetration by 15% [95% confidence interval (CI) adjusted odds ratio (AOR) 1.08, 1.23], and an increase of 15 Australian standard drinks increased the odds by 42% (95% CI AOR 1.20, 1.69).

DISCUSSION AND CONCLUSIONS

Individual characteristics, larger quantities of alcohol consumed, and a disinclination to practice harm reduction amplified risk of AHTO perpetration. This has implications for health promotion and risk prevention/reduction strategies.

Formative process evaluation of a guideline-driven process for improving the cultural responsiveness of alcohol and drug treatment services

Background

To improve Australian Aboriginal and Torres Strait Islander people’s access to, and experience of, healthcare services, including Alcohol and other Drug (AoD) treatment services, principles and frameworks have been developed to optimise cultural responsiveness. Implementing those principles in practice, however, can be difficult to achieve. This study has five aims: i) to describe a five-step process developed to operationalise improvements in culturally responsive practice in AoD services; ii) to evaluate the fidelity of implementation for this five-step process; iii) to identify barriers and enablers to implementation; iv) to assess the feasibility and acceptability of this approach; and v) to describe iterative adaptation of implementation processes based on participant feedback.

Methods

Participating services were 15 non-Aboriginal AoD services in New South Wales, Australia. Implementation records were used to assess the implementation fidelity of the project. Structured interviews with chief executive officers or senior management were conducted, and interview data were thematically analysed to identify project acceptability, and the key enablers of, and barriers to, project implementation. Quantitative descriptive analyses were performed on the post-implementation workshop survey data, and responses to the free text questions were thematically analysed.

Results

A high level of implementation fidelity was achieved. Key enablers to improving culturally responsive practice were the timing of the introduction of the five-step process, the active interest of staff across a range of seniority and the availability of resources and staff time to identify and implement activities. Key barriers included addressing the unique needs of a range of treatment sub-groups, difficulty adapting activities to different service delivery models, limited time to implement change in this evaluation (three months) and the varied skill level across staff. The project was rated as being highly acceptable and relevant to service CEOs/managers and direct service staff, with planned changes perceived to be achievable and important. Based on CEO/management feedback after the project was implemented at the initial services, several improvements to processes were made.

Conclusion

The operationalisation of the five-step process developed to improve cultural responsiveness was feasible and acceptable and may be readily applicable to improving the cultural responsiveness of a wide variety of health and human services.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12913-021-06367-7.

The association between parental supply of alcohol and supply from other sources to young people: a prospective cohort

AIMS

Despite legal age limits set for alcohol consumption, parents are one of the main suppliers of alcohol to underage minors. Although supply from non-parental sources has been found to be associated with greater risk of harm compared with parental supply, the association between parental supply and supply from other sources is unclear. This study investigated the associations between parental supply of sips and whole serves of alcohol on subsequent other supply, conditional on current supply from non-parental sources.

METHODS

Data from the Australian Parental Supply of Alcohol Longitudinal Study cohort of adolescents was used. A cohort of 1927 Australian children recruited in grade 7 (mean age 12.9 years) was surveyed annually from 2010 to 2016 (94%, n = 1821 included for analyses). The primary outcome was alcohol exposure from other sources ('other supply'), including alcohol supply from other adults, friends, siblings, or self-supply, compared with adolescents reporting no supply from these sources. Analyses were conducted using random intercept logistic regression (to account for within-respondent correlation).

RESULTS

Parental supply of alcohol alone was associated with increased odds of receiving alcohol from other non-parental sources in subsequent years (OR: 1.99; 95% CI: 1.65-2.39) after adjusting for confounders. Increased odds of subsequent other supply were associated with current parental supply of sips (OR: 1.92; 95% CI: 1.56-2.36) and whole drinks (OR: 2.76; 95% CI: 1.85-4.11).

CONCLUSIONS

Parental supply of alcohol appears to increase the risk of subsequent supply of alcohol from other sources in certain contexts.

Parent hazardous drinking and their children's alcohol use in early and mid-adolescence: prospective cohort study

BACKGROUND

Why adolescents' drinking is associated with their parents' drinking remains unclear. We examined associations in a prospective cohort study, adjusting for socio-demographic characteristics and family factors.

METHODS

We recruited 1927 children from grade 7 classes (mean age 13 years), and one of their parents, in three Australian states, contacted participants annually from 2010 to 2014, and analysed data from assessments at ages 13, 14, 15 and 16 years. We used the Alcohol Use Disorders Identification Test-Consumption (AUDIT-C) subscale to identify hazardous drinking in parents (score ≥5) and children (score ≥3) and constructed mixed-effect logistic regression models, accounting for clustering within school and adjusting for likely confounders. We evaluated the sensitivity of estimates by imputing missing values assuming the data were missing at random vs. missing not at random.

RESULTS

Parent hazardous drinking predicted mid-adolescent hazardous drinking, e.g. 15 years olds whose parents [adjusted odds ratio (aOR) 2.00; 95% confidence interval 1.51-2.64] or parents' partners (aOR 1.94; 1.48-2.55) were hazardous drinkers had higher odds of being hazardous drinkers at age 16. The magnitude of univariate associations changed little after adjusting for covariates, and sensitivity analyses confirmed the robustness of the association, across a wide range of assumptions about the missing data.

CONCLUSIONS

The associations between parents' and their adolescent children's hazardous drinking are unlikely to be due to confounding by socio-demographic and family factors. Parents should be encouraged, and supported by public policy, to reduce their own alcohol consumption in order to reduce their children's risk of becoming hazardous drinkers.

The overall effect of parental supply of alcohol across adolescence on alcohol-related harms in early adulthood-a prospective cohort study

BACKGROUND AND AIMS

Recent research suggests that parental supply of alcohol is associated with more risky drinking and alcohol-related harm among adolescents. However, the overall effect of parental supply throughout adolescence remains unclear, because parental supply of alcohol varies during adolescence. Due to the complexity of longitudinal data, standard analytical methods can be biased. This study examined the effect of parental supply of alcohol on alcohol-related outcomes in early adulthood using robust methods to minimize risk of bias.

DESIGN

Prospective longitudinal cohort study.

SETTING

Australia PARTICIPANTS: A cohort of school students (n = 1906) recruited in the first year of secondary school (average age 12.9 years) from Australian schools in 2010-11, interviewed annually for 7 years.

MEASUREMENTS

The exposure variable was self-reported parental supply of alcohol (including sips/whole drinks) during 5 years of adolescence (waves 1-5). Outcome variables were self-reported binge drinking, alcohol-related harm and symptoms of alcohol use disorder, measured in the two waves after the exposure period (waves 6-7). To reduce risk of bias, we used targeted maximum likelihood estimation to assess the (counterfactual) effect of parental supply of alcohol in all five waves versus no supply on alcohol-related outcomes.

FINDINGS

Parental supply of alcohol throughout adolescence saw greater risk of binge drinking [risk ratios (RR) = 1.53; 95% confidence interval (CI) = 1.27-1.84] and alcohol-related harms (RR = 1.44; 95% CI = 1.22-1.69) in the year following the exposure period compared with no supply in adolescence. Earlier initiation of parental supply also increased risk of binge drinking (RR = 1.10; 95% CI = 1.05-1.14), and any alcohol-related harm (RR = 1.09; 95% CI = 1.05-1.13) for each year earlier parental supply began compared with later (or no) initiation.

CONCLUSIONS

Adolescents whose parents supply them with alcohol appear to have an increased risk of alcohol-related harm compared with adolescents whose parents do not supply them with alcohol. The risk appears to increase with earlier initiation of supply.

Adolescent Alcohol Use Trajectories: Risk Factors and Adult Outcomes

OBJECTIVES

Adolescents often display heterogenous trajectories of alcohol use. Initiation and escalation of drinking may be important predictors of later harms, including alcohol use disorder (AUD). Previous conceptualizations of these trajectories lacked adjustment for known confounders of adolescent drinking, which we aimed to address by modeling dynamic changes in drinking throughout adolescence while adjusting for covariates.

METHODS

Survey data from a longitudinal cohort of Australian adolescents (n = 1813) were used to model latent class alcohol use trajectories over 5 annual follow-ups (mean age = 13.9 until 17.8 years). Regression models were used to determine whether child, parent, and peer factors at baseline (mean age = 12.9 years) predicted trajectory membership and whether trajectories predicted self-reported symptoms of AUD at the final follow-up (mean age = 18.8 years).

RESULTS

We identified 4 classes: abstaining (n = 352); late-onset moderate drinking (n = 503); early-onset moderate drinking (n = 663); and early-onset heavy drinking (n = 295). Having more alcohol-specific household rules reduced risk of early-onset heavy drinking compared with late-onset moderate drinking (relative risk ratio: 0.31; 99.5% confidence interval [CI]: 0.11-0.83), whereas having more substance-using peers increased this risk (relative risk ratio: 3.43; 99.5% CI: 2.10-5.62). Early-onset heavy drinking increased odds of meeting criteria for AUD in early adulthood (odds ratio: 7.68; 99.5% CI: 2.41-24.47).

CONCLUSIONS

Our study provides evidence that parenting factors and peer influences in early adolescence should be considered to reduce risk of later alcohol-related harm. Early initiation and heavy alcohol use throughout adolescence are associated with increased risk of alcohol-related harm compared with recommended maximum levels of consumption (late-onset, moderate drinking).

Safety first: Beliefs of older peers supplying alcohol to underage friends

ISSUE ADDRESSED

Underage drinkers most commonly source alcohol from older peers. However, few studies have examined older peers' supply-related beliefs and motivations.

METHODS

A sample of 270 risky drinkers aged 18-19 years were interviewed in Australia where the legal purchase age is 18. They were asked about their provision to underage friends, awareness of secondary supply legislation (intended to prohibit such supply) and 24 psycho-legal beliefs around supply.

RESULTS

Half (49%) provided alcohol to a 16- to 17-year-old friend to drink at a party they were both attending at least twice a year. Three-quarters reported provision was okay so long as the recipient(s) were in a safe environment, and 46% reported "everyone gives alcohol to teenagers if they are in a safe environment." There was significantly higher agreement that "my friends would think I was mean if I did not give alcohol to a friend under the age of 18" (37%), compared to "my friends would think I was uncool if I did not give alcohol to a friend under the age of 18" (26%). Two thirds (69%) felt more responsible for an underage friend's safety if they provided the alcohol. A multivariate logistic regression revealed supply was more likely if the supplier: was aged 18 compared to 19 (95% CI OR: 1.57, 4.84), male (1.06, 3.27), of a higher SES quintile (1.08, 1.80) and believed alcohol supply to minors was morally acceptable (1.01, 1.33) and normal (1.04, 1.38). Knowledge of regulatory strategies (68%) designed to prevent supply to minors, and their perceived deterrent value did not significantly impact supply.

CONCLUSIONS

Supply of alcohol to underage peers was perceived as morally and socially acceptable in a group of 18- to 19-year-old risky drinkers. SO WHAT?: Opportunities include harm reduction initiatives that prioritise caring responsibilities towards friends, as opposed to relying on external enforcement measures alone.

Concordance between physiotherapists and physicians for care of patients with musculoskeletal disorders presenting to the emergency department

Background

Overcrowding in emergency departments (ED) is a major concern worldwide. To answer increasing health care demands, new models of care including advanced practice physiotherapists (APP) have been implemented in EDs. The purpose of this study was to assess diagnostic, treatment and discharge plan concordance between APPs and ED physicians for patients consulting to the ED for minor musculoskeletal disorders (MSKD).

Methods

Patients presenting to two EDs in Montréal (Canada) with a minor MSKD were recruited and independently assessed by an APP and ED physician. Both providers had to formulate diagnosis, treatment and discharge plans. Cohen’s kappa (κ) and Prevalence and Bias Adjusted Kappas (PABAK) with associated 95%CI were calculated. Chi Square and t-tests were used to compare treatment, discharge plan modalities and patient satisfaction between providers.

Results

One hundred and thirteen participants were recruited, mean age was 50.3 ± 17.4 years old and 51.3% had an atraumatic MSKD. Diagnostic inter-rater agreement between providers was very good (κ = 0.81; 95% CI: 0.72–0.90). In terms of treatment plan, APPs referred significantly more participants to physiotherapy care than ED physicians (κ = 0.27; PABAK = 0.27; 95% CI: 0.07–0.45; p = 0.003). There was a moderate inter-rater agreement (κ = 0.46; PABAK = 0.64; 95% CI: 0.46–0.77) for discharge plans. High patient satisfaction was reported with no significant differences between providers (p = 0.57).

Conclusion

There was significant agreement between APPs and ED physicians in terms of diagnosis and discharge plans, but more discrepancies regarding treatment plans. These results tend to support the integration of APPs in ED settings, but further prospective evaluation of the efficiency of these types of models is warranted.

Parental supply of alcohol as a predictor of adolescent alcohol consumption patterns: A prospective cohort

BACKGROUND

Recent research has not supported the idea that parental supply of alcohol to adolescents prevents later alcohol-related harm. Yet the specific role of parental supply in shaping patterns of drinking over time remains unclear. This study investigated the role of parental supply of alcohol in patterns of drinking across adolescence, and assessed whether that role remained consistent over time.

METHOD

Using a longitudinal cohort of 1927 adolescents (mean age 12.9 years), recruited in 2010 and 2011 from schools across Australia and followed up annually until 2016, we assessed three outcomes using mixed-effect negative binomial regression: frequency of consumption, typical quantity consumed, and overall alcohol consumption in the year (frequency * quantity). Child, parental, familial, and peer confounders of adolescent alcohol consumption were measured and adjusted for in the analyses.

FINDINGS

Parental supply was associated with greater overall consumption in earlier adolescence: Grade 7-8 (incidence rate ratio [IRR]: 3.61; 95% CI: 2.55, 5.12; no supply IRR: 1.00), Grade 8-9 (IRR: 4.84; 95% CI: 3.66, 6.39; no supply IRR: 1.44) and Grade 9-10 (IRR: 8.33; 95% CI: 6.28, 11.05; no supply IRR: 4.75). Alcohol consumption continued to increase in later adolescence regardless of whether parental supply occurred.

CONCLUSIONS

Parental supply of alcohol was associated with increased alcohol consumption by their children during early adolescence. While parental supply appears to have less impact on drinking in later adolescence, there was no evidence to suggest it is protective. Parents should be advised to avoid supplying children with alcohol, particularly in early adolescence.

Alcohol supply as a favour for a friend: Scenarios of alcohol supply to younger friends and siblings

ISSUES ADDRESSED

Adolescents under the legal purchase age primarily source their alcohol through social networks. This study assessed the provision context from the perspective of both underage recipients and their suppliers who were older peers and siblings.

METHODS

Interviewer-administered surveys were conducted with 590 risky-drinking (50 g alcohol per session, at least monthly) adolescents. Participants of legal purchase age (18- to 19-year-olds; n = 269) reported their provision to 16- to 17-year-olds under eight scenarios. Those aged 14-17 (n = 321) reported receipt of alcohol under the same scenarios plus two parental supply contexts.

RESULTS

Purchase-age participants reported supply: to an underage friend (67%), an acquaintance (44%) or a sibling (16%) to drink at the same party; to a friend (43%) or sibling (20%) to take to another party (20%) and to a stranger near a bottle shop (5%). Supply to a friend at the same party was more likely if money was exchanged (60% vs 40%; P < 0.001). Almost all (98%) 14- to 17-year-olds reported receiving alcohol from an adult (including 36% from a parent for consumption away from the parent), with a similar pattern of receipt scenarios as those reported by the 18- to 19-year-olds.

CONCLUSIONS

Provision of alcohol was more frequent with a friend than a sibling or stranger, in close environmental proximity, and if money was exchanged. SO WHAT?: As supply may be sensitive to monetary considerations, the incidence of underage receipt may be affected by community-wide pricing measures. Traditional alcohol availability regulations should be supplemented by strategies relating to the social nature of supply and demand.

Insomnia and Regulation of Sleep-Wake Cycle With Drugs Among Adolescent Risky Drinkers

STUDY OBJECTIVES

We aimed to explore symptoms of insomnia in a group of youths characterized as engaging in risky drinking, their use of drugs as sleep/ wake aids, and the relationships between alcohol and other drug use and insomnia.

METHODS

Face-to-face interviews were conducted with 596 Australian 14 to 19-year-olds identified as engaging in regular risky drinking. They completed the Insomnia Severity Index and were assessed for recent alcohol and other drug use, including drugs used specifically as sleep aids or to stay awake. Alcohol-related problems, emotional distress, self-control, and working outside of traditional hours were also assessed using validated scales.

RESULTS

More than one-third of the study participants (36%) reported moderate to very severe sleep-onset insomnia, and 39% screened positive for clinical insomnia using adolescent criteria. Three-fourths used drugs in the past 2 weeks to regulate their sleep cycle (65% used stimulants to stay awake, mainly caffeine, and 32% used a depressant to get to sleep, mainly cannabis). Regression analyses showed that after controlling for variables such as sex, emotional distress, self-control, alcohol use problems, and past 6-month illicit or non-prescribed drug use, those who used drugs specifically to get to sleep or to stay awake were 2.0 (P < .001) and 1.7 (P = .02) times more likely to report clinical insomnia, respectively.

CONCLUSIONS

Insomnia was commonly reported in this community sample of adolescents characterized as engaging in risky drinking. Those with symptoms of insomnia appeared to be managing their sleep-related symptoms through alcohol and other drug use, which may have further exacerbated their sleep issues.

What do primary care providers think about implementing breast cancer survivorship care?

Purpose

As cancer centres move forward with earlier discharge of stable survivors of early-stage breast cancer (bca) to primary care follow-up, it is important to address known knowledge and practice gaps among primary care providers (pcps). In the present qualitative descriptive study, we examined the practice context that influences implementation of existing clinical practice guidelines for providing such care. The purpose was to determine the challenges, strengths, and opportunities related to implementing comprehensive evidence-based bca survivorship care guidelines by pcps in southeastern Ontario.

Methods

Semi-structured interviews were conducted with 19 pcps: 10 physicians and 9 nurse practitioners.

Results

Thematic analysis revealed 6 themes within the broad categories of knowledge, attitudes, and resources. Participants highlighted 3 major challenges related to providing bca survivorship care: inconsistent educational preparation, provider anxieties, and primary care burden. They also described 3 major strengths or opportunities to facilitate implementation of survivorship care guidelines: tools and technology, empowering survivors, and optimizing nursing roles.

Conclusions

We identified several important challenges to implementation of comprehensive evidence-based survivorship care for bca survivors, as well as several strengths and opportunities that could be built upon to address those challenges. Findings from our research could inform targeted knowledge translation interventions to provide support and education for pcps and bca survivors.

Association of parental supply of alcohol with adolescent drinking, alcohol-related harms, and alcohol use disorder symptoms: a prospective cohort study

BACKGROUND

Some parents supply alcohol to their children, reportedly to reduce harm, yet longitudinal research on risks associated with such supply is compromised by short periods of observation and potential confounding. We aimed to investigate associations between parental supply and supply from other (non-parental) sources, with subsequent drinking outcomes over a 6-year period of adolescence, adjusting for child, parent, family, and peer variables.

METHODS

We did this prospective cohort study using data from the Australian Parental Supply of Alcohol Longitudinal Study cohort of adolescents. Children in grade 7 (mean age 12 years), and their parents, were recruited between 2010 and 2011 from secondary schools in Sydney, Perth, and Hobart, Australia, and were surveyed annually between 2010 and 2016. We examined the association of exposure to parental supply and other sources of alcohol in 1 year with five outcomes in the subsequent year: binge drinking (more than four standard drinks on a drinking occasion); alcohol-related harms; and symptoms of alcohol abuse (as defined by Diagnostic and Statistical Manual of Mental Disorders, 4th edition [DSM-IV]), alcohol dependence, and alcohol use disorder (as defined by DSM-5). This trial is registered with ClinicalTrials.gov, number NCT02280551.

FINDINGS

Between September, 2010, and June, 2011, we recruited 1927 eligible parents and adolescents (mean age 12·9 years [SD 0·52]). Participants were followed up until 2016, during which time binge drinking and experience of alcohol-related harms increased. Adolescents who were supplied alcohol only by parents had higher odds of subsequent binge consumption (odds ratio [OR] 2·58, 95% CI 1·96-3·41; p<0·0001), alcohol-related harm (2·53, 1·99-3·24; p<0·0001), and symptoms of alcohol use disorder (2·51, 1·46-4·29; p=0·0008) than did those reporting no supply. Parental supply of alcohol was not significantly associated with the odds of reporting symptoms of either alcohol abuse or dependence, compared with no supply from any source. Supply from other sources was associated with significant risks of all adverse outcomes, compared with no supply, with an even greater increased risk of adverse outcomes.

INTERPRETATION

Providing alcohol to children is associated with alcohol-related harms. There is no evidence to support the view that parental supply protects from adverse drinking outcomes by providing alcohol to their child. Parents should be advised that this practice is associated with risk, both directly and indirectly through increased access to alcohol from other sources.

FUNDING

Australian Research Council, Australian Rotary Health, Foundation for Alcohol Research and Education, National Drug and Alcohol Research Centre.

Age of Alcohol Initiation and Progression to Binge Drinking in Adolescence: A Prospective Cohort Study

BACKGROUND

Early alcohol initiation is common and has been associated with the development of alcohol problems. Yet, past research on the association of age of initiation with later problem drinking has produced inconsistent findings. Using prospective data from the Australian Parental Supply of Alcohol Longitudinal Study cohort, this study examined age of alcohol initiation, and of first drunkenness, and associations with subsequent drinking in adolescence.

METHODS

A total of 1,673 parent-child dyads recruited through Australian secondary schools completed annual surveys for 5 years (grades 7 to 11). Limiting the sample to those adolescents who had initiated alcohol use by age 17 (n = 839), multinomial logistic regression models were used to examine associations between (i) age of initiation to alcohol use (consuming at least 1 full serve) and (ii) age of first drunkenness, and 2 outcomes: (i) binge drinking (consuming >4 standard drinks on a single occasion), and (ii) the total number of alcoholic drinks consumed in the past year, adjusted for a range of potential child, parent, family, and peer covariates.

RESULTS

Fifty percent of adolescents reported alcohol use and 36% reported bingeing at wave 5 (mean age 16.9 years), and the mean age of initiation to alcohol use for drinkers was 15.1 years. Age of initiation was significantly associated with binge drinking and total quantity of alcohol consumed in unadjusted and adjusted models. Age of first drunkenness was associated with total quantity of alcohol consumed in unadjusted models but not adjusted models and was not associated with subsequent bingeing.

CONCLUSIONS

Initiating alcohol use earlier in adolescence is associated with an increased risk of binge drinking and higher quantity of consumption in late secondary school, supporting an argument for delaying alcohol initiation for as long as possible to reduce the risk for problematic use in later adolescence and the alcohol-related harms that may accompany this use.

Sham acupuncture is as efficacious as true acupuncture for the treatment of IBS: A randomized placebo controlled trial

BACKGROUND

Irritable bowel syndrome (IBS) patients increasingly seek out acupuncture therapy to alleviate symptoms, but it is unclear whether the benefit is due to a treatment-specific effect or a placebo response. This study examined whether true acupuncture is superior to sham acupuncture in relieving IBS symptoms and whether benefits were linked to purported acupuncture mechanisms.

METHODS

A double blind sham controlled acupuncture study was conducted with Rome I IBS patients receiving twice weekly true acupuncture for 4 weeks (n=43) or sham acupuncture (n=36). Patients returned at 12 weeks for a follow-up review. The primary endpoint of success as determined by whether patients met or exceeded their established goal for percentage symptom improvement. Questionnaires were completed for symptom severity scores, SF-36 and IBS-36 QOL tools, McGill pain score, and Pittsburg Sleep Quality Index. A subset of patients underwent barostat measurements of rectal sensation at baseline and 4 weeks.

KEY RESULTS

A total of 53% in the true acupuncture group met their criteria for a successful treatment intervention, but this did not differ significantly from the sham group (42%). IBS symptom scores similarly improved in both groups. Scores also improved in the IBS-36, SF-36, and the Pittsburg Sleep Quality Index, but did not differ between groups. Rectal sensory thresholds were increased in both groups following treatment and pain scores decreased; however, these changes were similar between groups.

CONCLUSIONS & INFERENCES

The lack of differences in symptom outcomes between sham and true treatment acupuncture suggests that acupuncture does not have a specific treatment effect in IBS.

Parental supply of alcohol and alcohol consumption in adolescence: prospective cohort study

BACKGROUND

Parents are a major supplier of alcohol to adolescents, yet there is limited research examining the impact of this on adolescent alcohol use. This study investigates associations between parental supply of alcohol, supply from other sources, and adolescent drinking, adjusting for child, parent, family and peer variables.

METHOD

A cohort of 1927 adolescents was surveyed annually from 2010 to 2014. Measures include: consumption of whole drinks; binge drinking (>4 standard drinks on any occasion); parental supply of alcohol; supply from other sources; child, parent, family and peer covariates.

RESULTS

After adjustment, adolescents supplied alcohol by parents had higher odds of drinking whole beverages [odds ratio (OR) 1.80, 95% confidence interval (CI) 1.33-2.45] than those not supplied by parents. However, parental supply was not associated with bingeing, and those supplied alcohol by parents typically consumed fewer drinks per occasion (incidence rate ratio 0.86, 95% CI 0.77-0.96) than adolescents supplied only from other sources. Adolescents obtaining alcohol from non-parental sources had increased odds of drinking whole beverages (OR 2.53, 95% CI 1.86-3.45) and bingeing (OR 3.51, 95% CI 2.53-4.87).

CONCLUSIONS

Parental supply of alcohol to adolescents was associated with increased risk of drinking, but not bingeing. These parentally-supplied children also consumed fewer drinks on a typical drinking occasion. Adolescents supplied alcohol from non-parental sources had greater odds of drinking and bingeing. Further follow-up is necessary to determine whether these patterns continue, and to examine alcohol-related harm trajectories. Parents should be advised that supply of alcohol may increase children's drinking.

Pre-Drinking Behavior of Young Heavy Drinkers

BACKGROUND

Pre-drinking has been linked to subsequent heavy drinking and the engagement in multiple risky behaviors.

OBJECTIVES

The present study examined a group of adolescents who recently had a "big night out" to determine whether there were differences in their pre-drinking behavior based on age, gender, geographic location, and social setting.

METHODS

Participants (n = 351, aged 16-19) representing the heaviest 20-25% of drinkers in their age group were recruited using nonrandom sampling from metropolitan (Melbourne, Sydney, Perth) or regional (Bunbury) locations across Australia and administered a survey by a trained interviewer.

RESULTS

Almost half the sample pre-drank (n = 149), most commonly at a friend's house. Those aged 18-19 were more likely to pre-drink, and did so at higher quantities compared to their younger counterparts. Males and females reported similar pre-drinking duration, quantity and amount spent on alcohol. Compared to those in cities, regional participants consumed greater quantities over longer periods of time. Two-thirds of participants consumed alcohol in excess of national guidelines during their pre-drinking session. These participants were more likely to nominate price as a motivation to pre-drink and were less likely to report that someone else provided them alcohol.

CONCLUSIONS

This study sheds light on the pre-drinking habits of a population of young risky drinkers, and highlights the need for policy makers to address this form of drinking to reduce alcohol-related harm among young people.

Parents Who Supply Sips of Alcohol in Early Adolescence: A Prospective Study of Risk Factors

BACKGROUND

Parents are a major supplier of alcohol to adolescents, often initiating use with sips. Despite harms of adolescent alcohol use, research has not addressed the antecedents of such parental supply. This study investigated the prospective associations between familial, parental, peer, and adolescent characteristics on parental supply of sips.

METHODS

Participants were 1729 parent-child dyads recruited from Grade 7 classes, as part of the Australian Parental Supply of Alcohol Longitudinal Study. Data are from baseline surveys (Time 1) and 1-year follow-up (Time 2). Unadjusted and adjusted logistic regressions tested prospective associations between Time 1 familial, parental, peer, and adolescent characteristics and Time 2 parental supply.

RESULTS

In the fully adjusted model, parental supply was associated with increased parent-report of peer substance use (odds ratio [OR] = 1.20, 95% confidence ratio [CI], 1.08-1.34), increased home alcohol access (OR = 1.07, 95% CI, 1.03-1.11), and lenient alcohol-specific rules (OR=0.88, 95% CI, 0.78-0.99).

CONCLUSIONS

Parents who perceived that their child engaged with substance-using peers were more likely to subsequently supply sips of alcohol. Parents may believe supply of a small quantity of alcohol will protect their child from unsupervised alcohol use with peers. It is also possible that parental perception of peer substance use may result in parents believing that this is a normative behavior for their child's age group, and in turn that supply is also normative. Further research is required to understand the impacts of such supply, even in small quantities, on adolescent alcohol use trajectories.

Sipping, drinking, and early adolescent alcohol consumption: a cautionary note

BACKGROUND

Epidemiological studies report markedly varying rates of adolescent alcohol involvement. Despite being a common adolescent behavior, a potential cause of this variation is that consumption of sips is either not measured or not distinguished from consumption of whole beverages.

METHODS

Participants were 1,843 grade 7 adolescents recruited across 49 Australian secondary schools (M age = 12.4, SD = 0.5). Quantity and frequency of lifetime and past 6-month consumption were assessed, distinguishing between sipping and drinking. For comparison with international population surveys, quantity was reported as any consumption, sipping only, and drinking only.

RESULTS

Combining sipping and drinking into a single category, lifetime consumption was reported by 67.3% of the present sample. Distinguishing lifetime consumption by sipping and drinking: only 7.8% of adolescents had consumed a whole beverage; the remaining 59.6% had only sipped. Consumption of whole beverages was mostly limited to 1 to 2 drinks (84.2% of drinkers). Sipping and drinking were also infrequent: 78.2% of sipping and 60.4% of drinking, occurred less than monthly. Heavy episodic consumption was uncommon (1.2% of the sample). When other population studies were inspected, a clear trend for higher drinking rates were found in those studies where sipping was counted as drinking and vice versa.

CONCLUSIONS

Consumption of whole beverages appears infrequent in early adolescence, as sipping, but not drinking, was common in our sample. Comparing the present data with international population consumption measures highlights the need to more precisely measure and report adolescent consumption, particularly in relation to sipping.

Early Adolescent Alcohol Use: Are Sipping and Drinking Distinct?

BACKGROUND

Sipping alcohol is common during early adolescence, but research has ignored the distinction between sipping and drinking whole alcohol beverages, conflating the 2, or else simply classifying "sippers" as abstainers. Research has not addressed whether sippers are different to drinkers, in relation to variables known to be associated with adolescent alcohol consumption, or considered whether sipping and drinking behaviors may have quite different associations.

METHODS

Parent-child dyads (N = 1,823) were recruited in 3 states from Australian grade 7 classes. Multinomial logistic analyses compared adolescents who had only had a sip/taste of alcohol (sippers) with adolescents who had consumed at least a whole drink (drinkers) in the past 6 months. The multivariate model assessed a broad range of demographics, parenting practices, peer influences, and adolescent externalizing and internalizing behaviors, and controlled for school clustering.

RESULTS

Compared to drinkers, sippers were less likely to come from 1-parent households (odds ratio [OR] = 0.59, 95% confidence interval [CI]: 0.35 to 0.98); less likely to come from low-socioeconomic status (SES) households (OR = 0.54, 95% CI: 0.31 to 0.94); more likely to come from families where parents provide stricter alcohol-specific rules (OR = 1.21, 95% CI: 1.11 to 1.32), stricter monitoring of the child's activities (OR = 1.10, 95% CI: 1.04 to 1.16), more consistent parenting practices (OR = 1.13, 95% CI: 1.05 to 1.23), and more positive family relationships (OR = 1.56, 95% CI: 1.02 to 2.43); and report having fewer substance-using peers (OR = 0.80, 95% CI: 0.70 to 0.91) and greater peer disapproval of any substance use (OR = 1.30, 95% CI: 1.19 to 1.42). After adjustment for confounders, the associations with household composition and SES were no longer significant, but the familial and peer associations remained significant in the multivariate analysis, χ(2) (40) = 1,493.06, p < 0.001.

CONCLUSIONS

Sipping alcohol has different associations with known predictors of adolescent alcohol use than drinking whole beverages, and sipping may be a distinct or separable behavior. Future research should better define quantities of early consumption and assess the relationship between early sipping and drinking on long-term outcomes separately.