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PubMed2000

Marijuana use among HIV-positive and high-risk adolescents: a comparison of self-report through audio computer-assisted self-administered interviewing and urinalysis.

The validity of self-report of drug use has been found to vary widely. Moreover, previous research has focused on samples of adults. In 1996-1998, human immunodeficiency virus (HIV)-infected adolescents and high-risk, noninfected adolescents (n = 182) were recruited at 16 locations in 13 US cities into the Reaching for Excellence in Adolescent Care and Health (REACH) project, to the authors' knowledge, the first national study of disease progression among HIV-positive adolescents who were infected through sexual behavior or injection drug use. Self-report of marijuana use was assessed through audio computer-assisted self-administered interviewing (ACASI). Urines were tested for marijuana at a certified laboratory by using the enzyme-multiplied immunoassay technique. Conditional kappas for 2-, 5-, and 7-day self-reports were 0.57, 0.71, and 0.69, respectively. Maximum sensitivity was obtained from a combination of ACASI and urine drug testing. Contrary to previous studies, the data suggest that if a single evaluative instrument is to be used for prevalence, ACASI is more sensitive than urine drug testing for marijuana overall, but particularly for HIV-infected adolescents.

Adolescent↗

PubMedDate not supplied

Maternal recall of alcohol, cocaine, and marijuana use during pregnancy.

Alcohol, cocaine, and marijuana use during pregnancy was reported antenatally and at 13 months postpartum by 361 black inner city mothers. The two reports were moderately related for all three substances, but levels reported retrospectively were substantially higher. MAST scores did not differ for the two interviews. Most of the correlations of the antenatal and retrospective reports with maternal and infant characteristics were similar in magnitude; those that differed were somewhat stronger for the antenatal measures. Although the retrospective reports may provide a better indication of mean levels of fetal exposure, they may be less precise in rank ordering among individuals for purposes of correlational analysis. Women with higher MAST scores were particularly prone to report higher levels of both alcohol and cocaine when interviewed retrospectively, and more severely depressed mothers were more likely to report higher levels retrospectively for all three substances. These data suggest that women reporting more than 1.3 drinks/week antenatally (AA/day greater than 0.1) may actually be drinking at levels at risk for alcohol-related birth defects.

Adolescent↗

PubMed2005

Marijuana use and later problems: when frequency of recent use explains age of initiation effects (and when it does not).

Tobacco, alcohol, and marijuana are among the most commonly used drugs during adolescence. Initiation of marijuana use typically peaks at age 15, with risk of initiation continuing throughout adolescence. The goal of the current study was to prospectively examine the influence of age of marijuana initiation on four outcomes: physical health, mental health, illicit drug use other than marijuana, and marijuana-use related consequences at age 18. We controlled for several important predictors of adolescent drug use and its associated consequences, including demographics, social bonding variables, personality variables, and recent use of marijuana. Baseline survey data were collected in 1984 at grade 7 and follow up surveys were conducted at grades 8, 9, 10, and 12 (N = 2079). This initiates-only sample was 47% female, 66% White, 11% African American, 13% Hispanic, 5% Asian, and 5% other race or ethnicity. Findings indicated that age of initiation predicted marijuana consequences and other illicit drug use after controlling for demographic, social, and behavioral factors. However, once frequency of recent marijuana use was included in the models, age of initiation was only associated with other illicit drug use. Both primary and secondary prevention are needed to curb marijuana use and its associated harms.

Adolescent↗

PubMed2006

Consistency between adolescent reports and adult retrospective reports of adolescent marijuana use: explanations of inconsistent reporting among an African American population.

Drug use trends are typically monitored by surveys of retrospective self-reports of drug use; yet we know little about the consistency of reports made across the life course. This study examines the consistency of marijuana self-reports from adolescence and adulthood and what characterizes inconsistent reporting among a cohort of African American first graders followed longitudinally from age 6 to 32 (N=599, 51% female). Self-reported lifetime adolescent marijuana use (ages 16-17) and retrospective reports at age 32 were combined to categorize respondents as consistent reporters of nonuse (22%), consistent reporters of use (42%), adult recanters (19%), adolescent underreporters (8%), and inconsistent reporters of age of initiation (9%). Overall, about 64% of the population were consistent in their reports of adolescent marijuana use from adolescence to age 32. Multivariate logistic regression analyses found that recanters reported less marijuana use as adolescents, lower parental supervision during adolescence, lower deviant behavior as an adult, and stronger anti-drug values as adults than did consistent reporters. Adolescent underreporters reported less assault behaviors and less alcohol use as adolescents and had lower first grade math achievement than consistent reporters. Family background, depression, criminal arrests, and the field conditions of the interview were not related to inconsistent reporting.

Adolescent↗

PubMedDate not supplied

Marijuana use prevention: the In-DEPTH model program.

Over the past five years marijuana use has doubled among eighth, 10th and 12th grade students, and in several demographics it has tripled. The recent debate over the legalization of medical marijuana (California's Proposition 215), positive media messages, lack of parent/child discussion, and denial by schools and communities may be contributing factors to the rise of drug use among adolescents. The In-DEPTH program, a unique drug education model that educates, prevents, and provides intervention strategies in adolescent marijuana use, has in small multisite surveys shown initial success in decreasing marijuana use and positively changing beliefs. The program is based on pharmacology, addiction medicine principles, economics and the pharmaceutical sales model, and examines drug dealing as well as drug use.

Adolescent↗

PubMed1992

The age of alcohol onset and alcohol, cigarette, and marijuana use patterns: an analysis of drug use progression of young adults in New York State.

The authors extend the gateway theory by examining the relationship between the onset age of alcohol and the progression of drug use (alcohol, cigarettes, and marijuana) among 16 to 24 year old young adults residing in New York State. Logit analysis is employed to estimate the impact of the early onset of alcohol use on the subsequent use of other drugs. The findings suggest that alcohol use increases the chance of using cigarettes and marijuana, and alcohol-cigarette use significantly increases the likelihood of using marijuana. The early onset of alcohol use affects the current use of alcohol and other drugs; the impact is the strongest when the onset is initiated in a posited critical age period between 13 and 16.

Adolescent↗

PubMed2005

Daily patterns of alcohol, cigarette, and marijuana use in adolescent smokers and nonsmokers.

Timeline followback (TLFB) methodology was used to assess the daily use of cigarettes, alcohol, and marijuana in adolescent cigarette smokers and nonsmokers over the prior 30 days. Adolescent smokers reported more frequent daily use of both alcohol and marijuana than nonsmokers did. Of those smokers and nonsmokers who drank alcohol and used marijuana, smokers reported more frequent daily use of alcohol, but not marijuana. In examining daily use patterns, there were very few instances when adolescent smokers used alcohol but did not smoke cigarettes, and smokers used marijuana alone on more days than alcohol alone. One-fifth of the adolescent smokers used all three substances on the same day in the past month. There were no significant differences in the patterns of alcohol and marijuana use between female and male smokers, regardless of age. Implications for clinical interventions and future research are discussed.

Adolescent↗

PubMed2006

The Effects of Parental Tobacco and Marijuana Use and Personality Attributes on Child Rearing in African-American and Puerto Rican Young Adults.

This study assessed the effect of the interrelationship of mothers' and fathers' tobacco and marijuana use with their personality attributes on some of their child rearing behaviors. We used a longitudinal design to analyze the data of 258 males and females who were seen four times over a 13-year period from early adolescence through young adult parenthood. Thirty-one percent of the multiple regression analyses revealed significant interactions between the effect of tobacco or marijuana use and a personality attribute on child rearing. The majority of these significant interactions suggested that protective personality characteristics were offset by substance use risks resulting in less adequate child rearing. If these results are substantiated in an experimental intervention, it suggests that having resilient personality attributes does not protect against the negative effects of tobacco or marijuana use on child rearing.

Journal Article↗

PubMed1998

Pathways to marijuana use among adolescents: cultural/ecological, family, peer, and personality influences.

OBJECTIVE: To examine the linkages, cultural/ecological factors, and major psychosocial risk factors as they relate to drug use in a sample from Colombia, South America. METHOD: The participants were 1.687 adolescents living in mixed urban-rural communities in Colombia, South America. An individual interview was administered to youths in their homes by Colombian interviewers. The scales used were based on item intercorrelations grouped into the following risk categories: (1) adolescent personality, (2) family traits, (3) peer factors, and (4) cultural/ecological variables. RESULTS: Pearson correlations were computed for each variable and the frequency of marijuana use. Results show that each of the domains was related to adolescent marijuana use, with some notable gender differences. As regards the interrelation of domains, a mediational model was operative. CONCLUSIONS: Findings support a family interactional theory. The domains of family, personality, and peer factors had a direct effect on the adolescents' marijuana use. Implications for prevention are also addressed.

Adolescent↗

PubMed1986

Marijuana use and social control: a sociological perspective on deviance.

Drug use must be understood within the larger context of deviance. Certainly, the tendency to examine drug use in isolation from the more general study of delinquent behavior requires redress. By definition, illicit drug use is delinquent behavior. In the present paper, a theory of delinquent behavior is applied to marijuana use. A powerful explanation of marijuana use is offered by this modified version of social control theory.

Adolescent↗

PubMed2004

Alcohol and marijuana use among college students: economic complements or substitutes?

Previous research has shown that the recent tightening of college alcohol policies has been effective at reducing college students' drinking. Over the period in which these stricter alcohol policies have been put in place, marijuana use among college students has increased. This raises the question of whether current policies aimed at reducing alcohol consumption are inadvertently encouraging marijuana use. This paper begins to address this question by investigating the relationship between the demands for alcohol and marijuana for college students using data from the 1993, 1997 and 1999 waves of the Harvard School of Public Health's College Alcohol Study (CAS). We find that alcohol and marijuana are economic complements and that policies that increase the full price of alcohol decrease participation in marijuana use.

Adult↗

PubMed1992

The characterization of inconsistencies in self-reports of alcohol and marijuana use in a longitudinal study of adolescents.

The reliability of self-reported measures remains an important issue for research on adolescent alcohol and drug use. Many studies have concluded that adolescents' self-reports are valid and reliable, but few studies have excluded consistent nonusers from their reliability estimates, and no study has examined in detail the reliability of reported age at first use of substances. This study explores the consistency of self-reports of frequency of use and age of first use of alcohol and marijuana in a sample of 5,770 secondary school students in a southeastern U.S. county. Two waves of data were collected between 1985 and 1988 using state-of-the-art data collection procedures and self-administered instruments. Consistency of reports was examined by comparing reports at T1 and T2, approximately 1 year apart. Results showed that when consistent nonusers were dropped from the analysis, consistency rates of lifetime frequency of use dropped from 82.7% to 74.7% for alcohol and from 95.6% to 83.2% for marijuana. Reports were more consistent for lifetime marijuana use than for alcohol use, but these results must be interpreted with caution given differences in the measures for the two substances. Reliability of reported age of first use was very low for both substances. When consistent nonusers were dropped from the analysis, only 27.8% of respondents made consistent estimates of their age at first alcohol use and 34.4% for their age at first marijuana use. Implications and recommendations for this area of research are discussed.

Adolescent↗

PubMed2002

Risk and vulnerability for marijuana use problems: the role of affect dysregulation.

This study examined the moderating effects of impulsivity and affect lability on relations between marijuana use frequency and use consequences. From a sample of 592 undergraduates, 300 marijuana users completed a survey that assessed marijuana problems and the hypothesized risk and vulnerability factors. Affective variables were significantly associated with increased marijuana problems above and beyond the effects of gender and lifetime use frequency. A hypothesized vulnerability mechanism, whereby impulsivity strengthened the relationship between use frequency and marijuana problems, was observed. The findings support the hypothesis that affect dysregulation enhances risk for marijuana problems among young adults who use marijuana.

Adolescent↗

PubMedDate not supplied

Alcohol and marijuana use among rural youth: interaction of social and intrapersonal influences.

Epidemiological research indicates that the prevalence rate of drug use among adolescents has risen steadily during this decade, and although alcohol use has stabilized it is still highly prevalent. Psychosocial etiological models have typically examined main effects of risk and protective factors. This study examined moderating effects of intrapersonal skills on social (peer and parental) risks associated with alcohol and marijuana use among eighth-grade rural adolescents, an understudied population. Results indicated that the relationships of peer and parental attitudes, and peer usage to alcohol and marijuana use, are moderated by adolescents' decision-making and self-reinforcement skills. Social risk factors were strongly associated with increased alcohol and marijuana use among adolescents with poor intrapersonal skills. However, good decision-making and self-reinforcement skills diminished the influence of social risk factors on substance use. Results are discussed in terms of implications for psychosocial models of alcohol and drug use, and for designing effective school-based universal prevention interventions.

Adaptation, Psychological↗

PubMed1979

A social-learning approach to student marijuana use.

Three hundred seventy-two college students were administered a battery of questionnaires designed to assess the predictive power of four social variables (social support, perceived sanctions, availability, family models), and six psychological ones (locus of control, mortality-conscience guilt, personal meanings, functions for continuing use, belief in consequences, societal and non-societal means of valued goal attainment) with respect to marijuana use. Results support a social learning theory interpretation of marijuana use. Users have had pleasant experiences, believe that sanctions are minimal, and that marijuana is not harmful. Six predictor variables correlated +.76 with use.

Adolescent↗

PubMed1985

Vietnam military service and marijuana use.

The effect of military service in Vietnam on drug use among veterans is examined on the basis of data obtained from a nationwide random sample of 2,510 young men. It is generally believed that illicit drug use was more extensive in Vietnam in the 1970s than in earlier years of the conflict. Therefore variables were constructed to reflect location of service (United States; overseas, but not Vietnam; and Vietnam) and the time of service (before 1970; 1970 or later). The results of the analysis indicate that: military service in Vietnam had no significant effect on marijuana use while on active duty, service in 1970 or later had a significant positive effect on during service use while in the service, and location of military service and time of service had a significant interactive effect on rates of marijuana use after discharge from military service. The interaction of service in Vietnam and military service after 1970 has the strongest effect on the veteran's marijuana use in civilian life.

Adult↗

PubMedDate not supplied

Prenatal marijuana use and neonatal outcome.

In a longitudinal study of marijuana and other substance use during pregnancy, women were interviewed at each trimester of pregnancy. Growth parameters, morphological abnormalities and gestational age were assessed for the 519 liveborn singletons. There were few significant effects of marijuana use during pregnancy on birth weight, head or chest circumference, gestational age, or growth retardation after adjustment for covariates using a regression model for analysis. There was a small but significant negative effect of marijuana use during the first two months of pregnancy on birth length and a positive effect of marijuana use during the third trimester on birth weight.

Adult↗

PubMed2004

Correlates of inmates' self-reported HIV/AIDS risk behaviors, prior incarceration, and marijuana use.

The primary purpose of this study was to determine associations between measures of prior incarceration and marijuana use with self-reported HIV/AIDS risk behaviors among a sample of soon-to-be-released adult male inmates. Analyses presented exclusively involve calculating two multiple logistic regression models to test the study hypothesis. The general model specified self-reported marijuana use as an outcome with selected demographic variables including ethnicity, age, education, and income prior to incarceration as predictor variables. Significant bivariate associations were recorded for age, education, and sexual self-expectation with respect to reincarceration. Specifically, the least amount of education reported, the more likely study participants were to have been incarcerated more than once.

Acquired Immunodeficiency Syndrome↗