Youth alcohol and other drug use in the United States and Australia: a cross-national comparison of three state-wide samples.

Although youth drug and alcohol harm minimization policies in Australia are often contrasted with the abstinence and zero tolerance policies adopted in the United States, there has been little research directly comparing youth substance use behaviour in the two countries. Three state representative samples in Victoria, Australia (n = 7898) and in the US states of Oregon (n = 15,224) and Maine (n = 16,245) completed a common cross-sectional student survey. Rates of alcohol use (lifetime alcohol use, recent use in the past 30 days), alcohol use exceeding recommended consumption limits (binge drinking: five or more drinks in a session), other licit drug use (tobacco use), and norm-violating substance use (substance use at school, use in the past 30 days of marijuana or other illicit drug use) were compared for males and females at ages 12-17. Rates were lower (odds ratios 0.5-0.8) for youth in Maine and Oregon compared to Victoria for lifetime and recent alcohol use, binge drinking and daily cigarette smoking. However, rates of recent marijuana use and recent use of other illicit drugs were higher in Maine and Oregon, as were reports of being drunk or high at school. In contradiction of harm minimization objectives, Victoria, relative to the US states of Oregon and Maine, demonstrated higher rates of alcohol use exceeding recommended consumption limits and daily tobacco use. However, findings suggested that aspects of norm-violating substance use (substance use at school, marijuana use and other illicit drug use) were higher in the US states compared to Victoria.

Panel accretion and external validity in adolescent substance use research.

This study investigates the relationship of panel accretion to panel attrition and examines its impact on threats to external validity in adolescent substance use research. Panel accretion involves the addition of new participants to a panel design after initial baseline data has been obtained. Accretion occurs in longitudinal studies in which data is routinely gathered on all participants, as is often the case in prevention or epidemiological research on adolescent substance use. Accretion, attrition, and panel findings for three, 2-year panel samples in grades 7 through 9 are examined. The results indicate that accretion and attrition samples have an isomorphic relationship to one another on a range of dependent measures when drawn from the same population. The results are discussed in terms of their implications for adolescent substance use research, the examination of validity threats due to panel bias, and understanding the ecological validity of research findings.

Involvement in multiple problem behaviors of young urban adolescents.

This paper examines four areas of "problem behavior" (i.e., delinquency, high-risk sexual behavior, school failure, and substance abuse) in a sample of urban sixth and seventh grade students. We report descriptive statistics regarding rates of problem behaviors in each of the four categories and examine their interrelationships. The results suggest that the prevalence of problem behaviors in this sample is substantial. Data show a high degree of co-occurrence among problem behaviors in different areas, although many individuals also exhibit more limited involvement. These results underscore the importance of studying younger adolescents in poor, urban communities who may have different patterns and rates of problem behavior involvement than older youth from other contexts. The data also suggest that efforts to prevent high-risk involvements for youth in poor, urban communities should be broad-ranging and be implemented prior to middle school.

Panel attrition and external validity in adolescent substance use research.

Panel attrition threatens external validity in adolescent substance use research. A 7-year adolescent panel was examined to determine whether attrition effects varied by (a) type of substance assessed and (b) method of measurement and type of statistical analysis. Chi-squares and multivariate analyses of variance revealed that study dropouts were more likely to use substances and reported higher mean use of substances at baseline than stayers; attrition effects varied by substance; and mean use comparisons were more likely to detect attrition effects than use-nonuse comparisons. Implications of these findings for adolescent substance use research are discussed.

Two-year follow-up of a social-cognitive intervention to prevent substance use.

This study presents two-year follow-up results of the Adolescent Decision-Making Program initially implemented when students were in their sixth grade. The intervention was found to maintain a positive effect on mean tobacco use, but no differences were observed for mean alcohol, marijuana, or hard drug use. In a test of the differential effectiveness of the intervention, program students living with married parents reported lower mean tobacco use than control students living with married parents and program and control students living with single parents. Logistic regression analyses examining the proportion of users at follow-up revealed a negative program effect for alcohol and no differences for the other substances. Subsequent attrition analyses strongly suggested that the positive effect for tobacco use at follow-up was most likely even stronger, and that the negative effect for alcohol was spurious. The importance of examining both program and attrition effects when evaluating the impact of longitudinal preventive interventions was emphasized, and the need to consider alternative models to guide the conceptualization and evaluation of adolescent substance use prevention programs was discussed.

A reexamination of the effectiveness of self-care education for persons with arthritis.

We examined the effectiveness of 2 models of arthritis self-care intervention, the home study model and the small group model. The effects of disease diagnosis and duration, self-care behavior, perceived helplessness, social support, treatment choice, and formal education level on outcomes among persons with arthritis who participated in these programs were evaluated. A pretest-posttest control group design was utilized in the initial experimental study; comparison group designs were used in the longitudinal studies. Three hundred seventy-four subjects completed the interventions and 12 months of research followup. We found that the intervention models had a statistically significant positive impact on arthritis knowledge, self-care behavior, perceived helplessness, and pain. These findings did not vary when the effects of education level, disease diagnosis and duration, informal social support, and treatment choice were controlled. The small group intervention was more effective in bringing about initial improvements in pain and depression, whereas the home study intervention was more effective in maintaining improvements in perceived helplessness. Changes in perceived helplessness and self-care behavior appear to explain in part the observed improvement in pain.

Aggression and delinquency: Family and environmental factors.

Juvenile delinquency has become an increasing concern to society; aggressive behaviors are particularly harmful. This study examined parent and youth behaviors and personality types that may influence delinquent and aggressive behaviors. Youths were referred by the court to an intervention program; ratings of delinquency and aggression were derived from parent reports, self-reports, and court referral data. Results showed that high parent ratings of youth aggressiveness were related to high turmoil in the home and to youths' positive opinions of delinquent peers, while high aggressiveness of the youths' referring offenses was related to lax punishment. Developmentally, this suggests that in adolescence both the peer group and home influences are important in shaping different aspects of the youths' aggressive and delinquent behaviors.