Project description:AimsWe described the age-specific trajectories of total alcohol consumption and the consumption of different types of beverages among adult Norwegian women as they age, and how these relate to education, lifestyle, and health-related factors.MethodsThis study included 76 382 women aged 31-70 years who participated in at least two of the three Norwegian Women and Cancer (NOWAC) study surveys conducted in 1991-97, 1998-2003, and 2004-11. Group-based trajectory modeling was used to identify the trajectories of self-reported alcohol consumption. Multinomial regression models were used to fit the adjusted odds ratios (ORs) of the associations between education, lifestyle, health-related factors, and the trajectory membership. Analysis was stratified into two subcohorts: women aged 31-49 years and women aged 50-70 years at enrolment.ResultsFive different trajectories of total alcohol consumption were identified among the two subcohorts: non-drinker stable (12.5%-23.6%), low stable (66.3%-60.1%), light increasing or light unstable (17.8%-12.1%), moderate to high or light to high (2.8%-2.7%), and high to moderate or moderate decreasing (.6%-1.4%). Trajectories were resembled by those of wine consumption. Compared to low stable drinkers, women who sustained or increased their total alcohol consumption showed higher ORs for higher education level, excellent self-rated health, former or current smoking status, and a body mass index (BMI) below 25 kg/m2.ConclusionWhile most women in this study maintained stable low-light levels of alcohol consumption, certain groups-such as women with higher education and better health-were more likely to increase their drinking with age. Women can particularly increase their drinking around the retirement age. The increasing trends of total alcohol consumption were reflected by those of wine. These findings provide information into groups and beverages that could be targeted in alcohol-reducing interventions.
Project description:PurposeAlcohol consumption is an established breast cancer risk factor, though further research is needed to advance our understanding of the mechanism underlying the association. We used global metabolomics profiling to identify serum metabolites and metabolic pathways that could potentially mediate the alcohol-breast cancer association.MethodsA cross-sectional analysis of reported alcohol consumption and serum metabolite concentrations was conducted among 211 healthy women 25-29 years old who participated in the Dietary Intervention Study in Children 2006 Follow-Up Study (DISC06). Alcohol-metabolite associations were evaluated using multivariable linear mixed-effects regression.ResultsAlcohol was significantly (FDR p < 0.05) associated with several serum metabolites after adjustment for diet composition and other potential confounders. The amino acid sarcosine, the omega-3 fatty acid eicosapentaenoate, and the steroid 4-androsten-3beta,17beta-diol monosulfate were positively associated with alcohol intake, while the gamma-tocopherol metabolite gamma-carboxyethyl hydroxychroman (CEHC) was inversely associated. Positive associations of alcohol with 2-methylcitrate and 4-androsten-3beta,17beta-diol disulfate were borderline significant (FDR p < 0.10). Metabolite set enrichment analysis identified steroids and the glycine pathway as having more members associated with alcohol consumption than expected by chance.ConclusionsMost of the metabolites associated with alcohol in the current analysis participate in pathways hypothesized to mediate the alcohol-breast cancer association including hormonal, one-carbon metabolism, and oxidative stress pathways, but they could also affect risk via alternative pathways. Independent replication of alcohol-metabolite associations and prospective evaluation of confirmed associations with breast cancer risk are needed.
Project description:BackgroundExcessive alcohol consumption contributes to significant morbidity and mortality. Heritable influences contribute to 50% of the variation in alcohol consumption, suggesting the important role of genes. We used data on a previously defined alcohol consumption factor score in a sample of 827 young women to investigate association with 1,014 single-nucleotide polymorphisms in genes related to addiction.MethodsData were drawn from the Missouri Adolescent Female Twin Study (MOAFTS) with replication in the college drinking sample (CDS). Genotypic and phenotypic data were available on 827 MOAFTS and 100 CDS women of European-American ancestry. Data on 1,014 single-nucleotide polymorphisms (SNPs) across 130 genes related to addiction were utilized. Association was conducted in QTDT, which allows for identity-by-descent information to account accurately for twin status in the analysis. The total association variance components model was used, with specification of variance components for relatedness in MOAFTS.ResultsThe top signals included clusters of SNPs in tryptophan hydroxylase 2 (TPH2) (e.g., rs1386496, p = 0.0003) and dopa decarboxylase (DDC) (e.g., rs3779084, p = 0.0008), genes that encode proteins responsible for serotonin synthesis. Additional polymorphisms in ADH1B, ADH1C, ADH7, and ADH1A1 were also associated at p < 0.05. The false discovery rate for the top signal (p = 0.0003) was 0.15, suggesting nominal significance only. Replication was limited and noted for 2 SNPs in ADH1C.ConclusionsWhile no results survive the burden of multiple testing, nominal findings in TPH2 and DDC suggest the potential role of the serotonin synthesis pathway in alcohol consumption.
Project description:BackgroundMost young adult women who smoke marijuana also drink alcohol. Marijuana-related problems are associated with marijuana use frequency. We hypothesized that increased alcohol use frequency potentiates the association between frequency of marijuana use and marijuana-related problem severity.MethodsWe recruited women aged 18 to 24 who smoked marijuana at least monthly and were not treatment seeking. Marijuana and alcohol use were measured using the timeline follow-back method. Problems associated with marijuana use were assessed using the Marijuana Problems Scale.FindingsParticipants (n = 332) averaged 20.5 ± 1.8 years of age, were 66.7% non-Hispanic White, and reported using marijuana on 51.5 ± 30.6 and alcohol on 18.9 ± 16.8 of the 90 previous days. Controlling for education, ethnicity, years of marijuana use, and other drug use, frequency of marijuana use (b = .22; p < .01) and frequency of alcohol use (b = 0.13; p < .05) had significant, positive effects on marijuana problem severity. In a separate multivariate model, the linear by linear interaction of marijuana by alcohol use frequency was significant (b = 0.18; p < .01), consistent with the hypothesis.ConclusionsConcurrent alcohol use impacts the experience of negative consequences from marijuana use in a community sample of young women. Discussions of marijuana use in young adults should consider the possible potentiating effects of alcohol use.
Project description:BackgroundHeavy alcohol consumption has been associated with risk-taking behaviors in intravenous drug users (IDU). However, limited information exists on the relationship between alcohol use and injecting and sexual risk in young adult IDU (<30 years) who are at risk for hepatitis C virus (HCV) and HIV infection.MethodsWe conducted a cross-sectional study of young adult IDU in San Francisco (2006-2012) who had not previously tested positive for HCV. Participants completed a structured interview and HCV testing. We examined whether hazardous drinking (Alcohol Use Disorders Test-Consumption [AUDIT-C] 3-9 for women and 4-9 for men) and probable dependent drinking (AUDIT-C 10-12) levels were associated with injecting and sexual risk behaviors and HCV status, indicated by adjusted odds ratios (AOR) in separate models controlling for potential confounders.ResultsOf the 326 participants, 139 (42.6%) were hazardous drinkers and 82 (25.2%) were probable dependent drinkers; thus over two-thirds evidenced problem drinking. Being a hazardous drinker was significantly associated with injecting drug residue from another's drug preparation equipment (AOR 1.93). Probable dependent drinking was significantly associated with sharing non-sterile drug preparation equipment (AOR 2.59), and inversely, with daily/near daily injecting (AOR 0.42). Both heavy drinking levels were associated with having ≥2 sexual partners (AOR 2.43 and 2.14). Drinking category was not associated with HCV test results.ConclusionThe young adult IDU reported consuming alcohol at very high levels, which was associated with some unsafe sexual and injecting behaviors. Our study demonstrates the urgent need to intervene to reduce alcohol consumption in this population.
Project description:Light-to-moderate alcohol consumption has been consistently associated with lower risk of heart disease, but data for stroke are less certain. A lower risk of stroke with light-to-moderate alcohol intake has been suggested, but the dose response among women remains uncertain and the data in this subgroup have been sparse.A total of 83 578 female participants of the Nurses' Health Study who were free of diagnosed cardiovascular disease and cancer at baseline were followed-up from 1980 to 2006. Data on self-reported alcohol consumption were assessed at baseline and updated approximately every 4 years, whereas stroke and potential confounder data were updated at baseline and biennially. Strokes were classified according to the National Survey of Stroke criteria.We observed 2171 incident strokes over 1 695 324 person-years. In multivariable adjusted analyses, compared to abstainers, the relative risks of stroke were 0.83 (95% CI, 0.75-0.92) for <5 g/d, 0.79 (95% CI, 0.70-0.90) for 5 to 14.9 g/d, 0.87 (0.72-1.05) for 15 to 29.9 g/d, and 1.06 (95% CI, 0.86-1.30) for 30 to 45 g/d. Results were similar for ischemic and hemorrhagic stroke.Light-to-moderate alcohol consumption was associated with a lower risk of total stroke. In this population of women with modest alcohol consumption, an elevated risk of total stroke related to alcohol was not observed.
Project description:Alcohol misuse and associated negative consequences experienced by college students persists as a public health concern. Quantitative studies demonstrate variability in subjective evaluations of consequences, and how positively or negatively consequences are evaluated is associated with drinking behavior. Lacking is a qualitative exploration of how drinkers evaluate consequences and what influences those evaluations. We conducted a series of single-gender focus groups (13 groups; 3-7 per group; n = 62, 48% female) with college student drinkers. Questions focused on: (a) types of negative and positive consequences experienced (b) personal perceptions of negative consequences and (c) factors influencing those perceptions. Verbatim transcripts were content analyzed using applied thematic analysis with NVivo software. Several negative consequences not included in current assessment tools emerged. Reactions to these "negative" consequences of alcohol misuse were not labeled as uniformly negative by participants. Contextual influences on reactions to consequences included: social factors (e.g., normative perceptions, social context, discussions with friends), level of intoxication, concurrent positive consequences, time, and alcohol as an excuse. Future research should focus on consequence measure development and examine interactions between contextual and individual influences on subjective consequence evaluations. (PsycINFO Database Record
Project description:Binge drinking refers to a pattern of alcohol intake that raises blood alcohol concentration to or above legal intoxication levels. It is common among young adults and is associated with health risks that scale up with alcohol intake. Acute intoxication depresses neural activity via complex signaling mechanisms by enhancing inhibition mediated by gamma-amino butyric acid (GABA), and by decreasing excitatory glutamatergic effects. Evidence primarily rooted in animal research indicates that the brain compensates for the acute depressant effects under the conditions of habitual heavy use. These neuroadaptive changes are reflected in neural hyperexcitability via downregulated inhibitory signaling, which becomes apparent as withdrawal symptoms. However, human evidence on the compensatory reduction in GABA signaling is scant. The neurochemical aspect of this mechanistic model was evaluated in the present study with proton magnetic resonance spectroscopy (1H-MRS) which is sensitive to GABA plus macromolecule signal (GABA + ). Furthermore, we examined sex differences in GABA + levels as a function of a recent history of binge drinking, given interactions between endogenous neurosteroids, GABA signaling, and alcohol. The study recruited young adult women and men (22.2 ± 2.8 years of age) who were classified as binge drinkers (BDs, N = 52) if they reported ≥ 5 binge episodes in the previous six months. Light drinkers (LDs, N = 49) reported drinking regularly, but not exceeding ≤ 2 binge episodes in the past six months. GABA-edited 1H-MR spectra were acquired from the occipital cortex at 3 T with the MEGA-PRESS sequence. GABA + signal was analyzed relative to water and total creatine (Cr) levels as a function of binge drinking history and sex. Controlling for within-voxel tissue composition, both GABA + indices showed decreased GABA + levels in BDs relative to LDs. The reduced GABA + concentration was associated with occasional high-intensity drinking in the BD group. This evidence is consistent with compensatory GABA downregulation that accompanies alcohol misuse, tipping the excitation/inhibition balance towards hyperexcitability. Analysis of the time course of GABA + neuroplasticity indicated that GABA + was lowest when measured one day after the last drinking occasion in BDs. While the BD vs LD differences were primarily driven by LD women, there was no interaction between Sex and a history of binge drinking. GABA + was higher in LD women compared to LD men. Aligned with the allostasis model, the mechanistic compensatory GABA downregulation observed in young emerging adults engaging in occasional binge drinking complements direct neural measures of hyperexcitability in BDs. Notably, these results suggest that neuroadaptation to alcohol is detectable at the levels of consumption that are within a normative range, and may contribute to adverse health outcomes.
Project description:Music is a ubiquitous feature of young adults' social drinking environments, yet no studies have assessed whether and how it impacts risky decisions to drink alcohol. Previous research on the influence of music on risky decisions is largely based around decision tasks with monetary incentives.MethodsTo assess the impact of music listening on risky drinking decisions, the current study used visual alcohol cues paired with hypothetical risky drinking scenarios (e.g., "You do not have a safe ride home" for alcohol). Young adult women with a history of alcohol abuse (N = 34) and casual-drinking control women (N = 29) made hypothetical decisions about whether or not to drink alcohol, or eat food (an appetitive control condition), in risky contexts while personal "party music" (music chosen by participants for "going out") and "home music" (music chosen for "staying in") played in the background. The main dependent measure - likelihood of drinking - was reported on a 4-point scale where 1 corresponded to "very unlikely", and 4 to "very likely".ResultsListening to party music while making decisions increased the likelihood of making risky decisions, regardless of alcohol abuse history, while other personal music did not. Further, party music specifically increased the likelihood of risky drinking decisions relative to risky eating decisions. As expected, those with a history of alcohol abuse made more risky drinking decisions in general, regardless of the type of music heard.DiscussionThe results suggest that party music is an important feature of the drinking environment associated with increased risky decisions about drinking alcohol in young adult women, regardless of their history of alcohol abuse. The finding that music plays an important role in risky drinking decisions indicates that further investigation into the real-world drinking environments of young adults is crucial, as it will aid in the development of a more complete picture of risky drinking decisions in young adults.
Project description:BackgroundEvidence from cross-sectional studies has suggested a positive association between moderate alcohol consumption and health-related quality of life but prospective data remain scarce.ObjectivesTo examine the bidirectional relationships between alcohol consumption and health-related quality of life using a longitudinal study design.MethodsA total of 92 448 participants of the Nurses' Health Study II reported their alcohol consumption (in 1991, 1995, 1999 and 2003) and health-related quality of life (in 1993, 1997 and 2001). Using generalized estimating equations, we modelled the physical and mental component summary (PCS and MCS) scores as a function of alcohol consumption 2 years earlier (n = 88 363) and vice versa (n = 84 621).ResultsGreater alcohol consumption was associated with better PCS scores 2 years later in a dose-response manner up to ~1 serving daily [mean difference (β) = 0.67 ± 0.06 PCS units, for moderate versus infrequent drinkers]. After adjustment for previous PCS, a similar but attenuated pattern was observed (β = 0.33 ± 0.07). Moderate alcohol consumption was not related to MCS, whereas moderate-to-heavy alcohol consumption was associated with lower MCS scores (β = -0.34 ± 0.15). Higher PCS scores were associated with greater alcohol consumption 2 years later, also after adjustment for previous alcohol consumption (β = 0.53 ± 0.05 g day(-1) ). MCS was not associated with alcohol consumption 2 years later.ConclusionAmongst young and middle-aged women, moderate alcohol intake was associated with a small improvement in physical health-related quality of life 2 years later and vice versa. Moderate alcohol consumption was not associated with mental health-related quality of life in either direction.