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a Alcohol Team, Division of Adult and Community Health
b Surveillance Research Team, Division of Adolescent and School Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia
| ABSTRACT |
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5 drinks on an occasion, is a common pattern of alcohol consumption among youth, few population-based studies have focused specifically on the characteristics of underage binge drinkers and their associated health risk behaviors. METHODS. We analyzed data on current drinking, binge drinking, and other health risk behaviors from the 2003 National Youth Risk Behavior Survey. Prevalence estimates and 95% confidence intervals were calculated by using SAS and SUDAAN statistical software. Logistic regression was used to examine the associations between different patterns of alcohol consumption and health risk behaviors.
RESULTS. Overall, 44.9% of high school students reported drinking alcohol during the past 30 days (28.8% binge drank and 16.1% drank alcohol but did not binge drink). Although girls reported more current drinking with no binge drinking, binge-drinking rates were similar among boys and girls. Binge-drinking rates increased with age and school grade. Students who binge drank were more likely than both nondrinkers and current drinkers who did not binge to report poor school performance and involvement in other health risk behaviors such as riding with a driver who had been drinking, being currently sexually active, smoking cigarettes or cigars, being a victim of dating violence, attempting suicide, and using illicit drugs. A strong dose-response relationship was found between the frequency of binge drinking and the prevalence of other health risk behaviors.
CONCLUSIONS. Binge drinking is the most common pattern of alcohol consumption among high school youth who drink alcohol and is strongly associated with a wide range of other health risk behaviors. Effective intervention strategies (eg, enforcement of the minimum legal drinking age, screening and brief intervention, and increasing alcohol taxes) should be implemented to prevent underage alcohol consumption and adverse health and social consequences resulting from this behavior.
Key Words: adolescents alcohol use adverse behaviors surveillance
Abbreviations: YRBSYouth Risk Behavior Survey AORadjusted odds ratio CIconfidence interval IOMInstitute of Medicine
Underage drinking is widely recognized as a leading public health and social problem in the United States1 and is associated with the 3 leading causes of death among youth (unintentional injury, homicide, and suicide).2 A number of studies have shown the harmful health and social consequences of underage drinking, such as neglecting responsibilities, getting into fights or arguments, missing school, driving after drinking, engaging in suicidal behavior, and engaging in risky sexual behavior.35 Underage drinking is also associated with carrying weapons, using illicit drugs, and having unprotected sexual activity.68 Some long-term effects of alcohol use during adolescence include increased risk of alcohol dependence, learning impairments, and memory impairments.9
Binge drinking, typically defined as drinking
5 drinks on an occasion,10 is a common pattern of alcohol consumption among adolescents who drink and accounts for 90% of the alcohol consumed by 12- to 17-year-old youth.11 However, few studies have specifically assessed the characteristics of underage binge drinkers and the relationship between binge drinking and other health risk behaviors. This association is important for understanding alcohol use among youth and for planning prevention strategies. This study evaluated the characteristics of high school students who drink; the drinking patterns among these students; and the association between binge drinking and other health risk behaviors, such as drinking and driving, risky sexual behavior, tobacco use, interpersonal violence, suicide, and other drug use.
| METHODS |
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Study Participants
A weighting factor was applied to each student record to adjust for nonresponse and for varying probabilities of selection, including those resulting from oversampling of black and Hispanic students. Thus, the YRBS data are representative of all public and private high school students in grades 9 through 12 in all 50 states and the District of Columbia. In 2003, the school response rate was 81%, the student response rate was 83%, and the overall response rate was 67%. The resulting sample size was 15240 completed questionnaires of which 15214 were usable after quality control.12,13
Risk Behavior Variables
Drinking behavior was measured by the following questions from the YRBS questionnaire: "During the past 30 days, on how many days did you have at least 1 drink of alcohol?" and "During the past 30 days, on how many days did you have
5 drinks of alcohol in a row, that is, within a couple of hours?" Respondents were categorized as nondrinkers (ie, no drinking during the past 30 days), current drinkers (ie, consuming
1 drink during the past 30 days) who did not binge drink (ie, consuming
5 drinks in a row during the past 30 days), or current drinkers who binge drank.
The other reported health risk behaviors we studied included the following: driving a car or other vehicle when you had been drinking alcohol during the past 30 days; riding in a car or other vehicle driven by someone who had been drinking alcohol during the past 30 days; having sexual intercourse with
1 person during the past 3 months (currently sexually active); no condom use during last sexual intercourse among sexually active students; drinking or using drugs before last sexual intercourse among sexually active students; ever having been or having gotten someone else pregnant; smoking cigarettes or cigars on
1 day during the past 30 days (current cigarette or cigar use); using chewing tobacco, snuff, or dip on
1 day during the past 30 days (current smokeless tobacco use); being in a physical fight during the past 12 months; "seriously" considering to attempt suicide during the past 12 months; "actually" attempting suicide
1 time during the past 12 months; using marijuana
1 time during the past 30 days (current marijuana use); using any form of cocaine
1 time during the past 30 days (current cocaine use); and sniffing glue, breathing aerosol spray, or inhaling paints
1 time during the past 30 days (current inhalant use). We also examined being physically hurt on purpose by boyfriend or girlfriend during the past 12 months; ever being physically forced to have sexual intercourse; and self-description of grades in school during the past 12 months.
Statistical Analysis
There were 1100 respondents who were excluded from this analysis because of missing responses on the current drinking question (n = 592), the binge-drinking question (n = 31), or both questions (n = 477). Those excluded represent
7% of the total survey respondents. Prevalence estimates with 95% confidence intervals (CIs) were calculated by using SAS (SAS Institute Inc, Cary, NC) and SUDAAN (Research Triangle Institute, Research Triangle Park, NC) statistical software. Overlapping CIs were used to assess statistical significance. To examine the relationship between drinking status and health risk behaviors, logistic regression was used to calculate adjusted odds ratios (AORs) with 95% CI, adjusting for binge-drinking days as a continuous variable, age as a continuous variable, gender, and race/ethnicity.
| RESULTS |
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4.7 million and 2.6 million students, respectively; Table 1). Girls reported more current drinking with no binge drinking than boys (17.8% vs 14.3%, respectively). Although black students had the highest prevalence of nondrinking of any racial/ethnic group, they had the highest prevalence of current drinking with no binge drinking (21.9%) compared with white students (14.6%), Hispanic students (16.4%), and students of other races (American Indian, Alaskan Native, Asian, Native Hawaiian, Pacific Islander and multi-racial) (16.0%). The prevalence of current drinking without binge drinking did not vary by age or school grade.
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Among current drinkers, 67.4% of boys and 61.1% of girls reported binge drinking (Table 2). Overall, boy drinkers aged 18 years and older reported the highest rate of binge drinking (74.0%). Of the students aged 15 years and older, in the 11th grade, of white race, and of black race, the boy current drinkers reported more binge drinking than the girl current drinkers. Black students who reported current drinking had the lowest rates of binge drinking for both boys and girls (48.7% and 34.7%, respectively) compared with students of other race/ethnicities. Current drinkers who were white, boys, and in the 12th grade had the highest rate of binge drinking (75.5%; data not shown).
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2 days was 73.3% (or 1.8 million) for boys and 63.7% (or 1.4 million) for girls; for
6 days, 28.2% (700000) and 18.3% (400000), respectively; and for
10 days, 13.6% (340000) and 6.8% (150000), respectively. This finding was observed across all grade levels (data not shown).
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10 days. Students who binge drank
10 days had prevalence estimates of engaging in these risk behaviors that were 1.5 to 24.7 times as high as the estimates of the students who binge drank only 1 day.
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| DISCUSSION |
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5 drinks of alcohol in a row), and approximately two thirds of binge drinkers reported binge drinking on >1 day during the 30 days preceding the survey. Nondrinkers had the lowest rates of health risk behaviors compared with both current and binge drinkers. Compared with students who drank alcohol but did not binge drink, binge drinkers were more likely to engage in health risk behaviors and to have poor school performance.
Similar to our findings, other studies have shown that underage drinking is associated with other health risk behaviors, such as not wearing a helmet while cycling, engaging in sexual activity at an early age and with multiple partners, and using illicit drugs.3 It is important to realize that those students who engage in these other risk behaviors are more susceptible to adverse health outcomes, such as head injury from not wearing helmets, death resulting from lack of seatbelt use or fighting with weapons, or being infected with sexually transmitted diseases because of promiscuity and lack of protection. Windle et al15 found that girls in 8th grade who drank heavily (
5 drinks in a row at least once during the past 2 weeks) were twice as likely to report attempting suicide than girls in 8th grade who did not drink. In another study of risk behavior among high school students in South Carolina, any alcohol consumption was significantly associated with physical fighting among white girls and carrying a weapon for all students except white girls; whereas binge drinking was associated with fighting among all boys and with carrying a weapon among white males and black girls.16
The high rates of current and binge drinking among young girls are of concern. Although binge-drinking rates were similar between boys and girls, girls aged 12 to 14 years were more likely to report binge drinking than their boy counterparts. This finding is similar to that shown in the 2004 Monitoring the Future study, where girls in the 8th grade had a higher binge-drinking rate than boys in the 8th grade.17 This gender difference contrasts with the drinking patterns observed among adults, where the prevalence of binge drinking is
3 times higher among men than women.18 If these rates among high school students persist into adulthood,19,20 we could see dramatic increases in binge drinking among adult women in the future. These findings are especially troubling because girls are more vulnerable to binge-drinkingrelated reproductive health outcomes, such as unintended pregnancy,21,22 sexually transmitted disease-related infertility,23,24 and alcohol-exposed pregnancies that could result in birth defects, such as fetal alcohol syndrome and fetal alcohol spectrum disorders.25,26 Indeed, an increase in binge drinking among adult women has already been noted in recent years.27
This study is unique because it examined the relationship between multiple health risk behaviors and alcohol consumption, as well as compared both binge drinkers and non-binge drinkers with nondrinkers. Because this was a cross-sectional study, however, a temporal relationship cannot be established between alcohol consumption and the risk behaviors studied. Furthermore, some of the associations found between alcohol consumption and risk behaviors may have been because of confounding factors that were not measured, such as parental alcohol abuse, emotional neglect, and other psychosocial factors that would affect multiple behaviors, including alcohol consumption. However, a number of non cross-sectional studies have demonstrated alcohol use and/or binge drinking to be associated with health risk behaviors, such as dating violence, unprotected sexual intercourse, and suicidal behavior.2830
This study has several limitations. First, all prevalence estimates were obtained by self-reports. Studies have questioned the accuracy of self-reports and shown that among adults, self-reports of alcohol consumption are underestimates.3134 If this were the case it would suggest that our prevalence estimates of current and binge drinking are conservative. This limitation also could mean that some of the increased risk associated with current drinking may actually be associated with binge drinking that was misclassified resulting from the respondent underreporting of binge-drinking occasions because recall was inaccurate. However, we do not know to what extent this may apply for anonymous, school-based surveys. Studies have shown these surveys typically have higher rates of self-reported alcohol use compared with other survey protocols (eg, household surveys) where youth may perceived a great risk of being identified.35 Second, because the YRBS is only administered to students in regular public or private high schools, these data do not represent alcohol use among youth who attended alternative schools or did not attend school. However, it is important to note that the vast majority of youth aged 12 to 18 years attend regular public or private schools36 and that those who do not attend these schools may have even higher rates of alcohol use.37
In addition, it is important to recognize that the prevalence of binge drinking among girls underestimates their risks of alcohol-related harms relative to boys based on the definition currently used in the YRBS (ie, using 5 drinks in a row for both boys and girls). From a physiologic perspective, girls typically weigh less than boys and have less alcohol dehydrogenase (the enzyme responsible for metabolizing ethanol) per unit of body mass than boys. Therefore, girls are more vulnerable than boys to the effects of alcohol consumption.38 For this reason, the new definition of binge drinking adopted by the National Institutes of Alcohol Abuse and Alcoholism recommends using a threshold of
4 drinks to define binge drinking among girls.39
| CONCLUSIONS |
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The ongoing problem of alcohol consumption among youth was addressed recently by the Institute of Medicine (IOM) of the National Academy of Sciences in a report entitled Reducing Underage Drinking: A Collective Responsibility.1 In its report, IOM "reached the fundamental conclusion that underage drinking cannot be successfully addressed by focusing on youth alone" and noted that "efforts to reduce underage drinking, therefore, need to focus on adults and must engage the society at large." Given this, we recommend the adoption of effective environmental interventions to reduce both youth drinking and excessive drinking in the general population.51 These interventions, which were also given special emphasis in the IOM report, include adequate enforcement of the minimum legal drinking age, increased alcohol excise taxes, reduced exposure of underaged youth to alcohol advertising and marketing, the implementation of comprehensive community-based programs to prevent excessive drinking, adoption of evidence-based education interventions that incorporate elements known to be effective and that are part of a comprehensive community program, the development of a national media campaign to reduce risky drinking among adults and youth, and improved surveillance for youth alcohol consumption. Current funding for the prevention of alcohol consumption among youth is a fraction of what is spent on the prevention of illegal drug use and tobacco use,1 despite the fact that alcohol use among youth is more widespread than either tobacco or illegal drug use and kills many more youth than illegal drugs.52 Adequate funding and community participation for the implementation of these strategies are necessary to effectively prevent underage drinking.
From the clinical point of view, pediatricians and family practice physicians should be aware that most of their high school-aged patients drink alcohol and usually do so to the point of intoxication. Clinicians should also be aware of recent evidence demonstrating that alcohol consumption by youth has some negative effects on the liver, bone, growth, and brain development of the adolescent53 and increases the risk of subsequent adult drinking problems.20,54,55 Some studies have shown that screening and brief intervention in medical settings may be helpful for youth who screen positive for alcohol problems.56 The American Academy of Pediatrics encourages clinicians to ask adolescents about their alcohol use, refer those adolescents with suspected drinking problems or other psychosocial problems for age-appropriate treatment, include guidance for substance abuse prevention in routine and episodic office visits, and encourage parental and community efforts to prevent underage drinking.6,57
| FOOTNOTES |
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Address correspondence to Jacqueline W. Miller, MD, Centers for Disease Control and Prevention, 4770 Buford Hwy, NE, Mailstop K-55, Atlanta, GA 30341. E-mail: jmiller5{at}cdc.gov
The findings and conclusions in this article are those of the authors and do not necessarily represent the views of the Centers for Disease Control and Prevention.
The authors have indicated they have no financial relationships relevant to this article to disclose.
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