Skills methods to prevent smoking

Behavioral Medicine in Primary Prevention

This article is a selective overview of behavioral medicine approaches to primary prevention. The main areas of discussion concern addictive behaviors and dietary factors. Overall, traditional educational approaches appear to succeed in altering understanding of these problems, but are less effective in actual prevention. More recently, behavioral medicine efforts, which focus on psychological and social influences, have demonstrated encouraging results. However, further systematic research is needed on these promising approaches before definitive conclusions can be drawn. Suggestions are provided for future primary prevention efforts as well as discernment of important mediating variables.

School-based programmes for preventing smoking

BACKGROUND

Helping young people to avoid starting smoking is a widely endorsed public health goal, and schools provide a route to communicate with nearly all young people. School-based interventions have been delivered for close to 40 years.

OBJECTIVES

The primary aim of this review was to determine whether school smoking interventions prevent youth from starting smoking. Our secondary objective was to determine which interventions were most effective. This included evaluating the effects of theoretical approaches; additional booster sessions; programme deliverers; gender effects; and multifocal interventions versus those focused solely on smoking.

SEARCH METHODS

We searched the Cochrane Central Register of Controlled Trials (CENTRAL), the Cochrane Tobacco Addiction Group's Specialised Register, MEDLINE, EMBASE, PsycINFO, ERIC, CINAHL, Health Star, and Dissertation Abstracts for terms relating to school-based smoking cessation programmes. In addition, we screened the bibliographies of articles and ran individual MEDLINE searches for 133 authors who had undertaken randomised controlled trials in this area. The most recent searches were conducted in October 2012.

SELECTION CRITERIA

We selected randomised controlled trials (RCTs) where students, classes, schools, or school districts were randomised to intervention arm(s) versus a control group, and followed for at least six months. Participants had to be youth (aged 5 to 18). Interventions could be any curricula used in a school setting to deter tobacco use, and outcome measures could be never smoking, frequency of smoking, number of cigarettes smoked, or smoking indices.

DATA COLLECTION AND ANALYSIS

Two reviewers independently assessed studies for inclusion, extracted data and assessed risk of bias. Based on the type of outcome, we placed studies into three groups for analysis: Pure Prevention cohorts (Group 1), Change in Smoking Behaviour over time (Group 2) and Point Prevalence of Smoking (Group 3).

MAIN RESULTS

One hundred and thirty-four studies involving 428,293 participants met the inclusion criteria. Some studies provided data for more than one group.Pure Prevention cohorts (Group 1) included 49 studies (N = 142,447). Pooled results at follow-up at one year or less found no overall effect of intervention curricula versus control (odds ratio (OR) 0.94, 95% confidence interval (CI) 0.85 to 1.05). In a subgroup analysis, the combined social competence and social influences curricula (six RCTs) showed a statistically significant effect in preventing the onset of smoking (OR 0.49, 95% CI 0.28 to 0.87; seven arms); whereas significant effects were not detected in programmes involving information only (OR 0.12, 95% CI 0.00 to 14.87; one study), social influences only (OR 1.00, 95% CI 0.88 to 1.13; 25 studies), or multimodal interventions (OR 0.89, 95% CI 0.73 to 1.08; five studies). In contrast, pooled results at longest follow-up showed an overall significant effect favouring the intervention (OR 0.88, 95% CI 0.82 to 0.96). Subgroup analyses detected significant effects in programmes with social competence curricula (OR 0.52, 95% CI 0.30 to 0.88), and the combined social competence and social influences curricula (OR 0.50, 95% CI 0.28 to 0.87), but not in those programmes with information only, social influence only, and multimodal programmes.Change in Smoking Behaviour over time (Group 2) included 15 studies (N = 45,555). At one year or less there was a small but statistically significant effect favouring controls (standardised mean difference (SMD) 0.04, 95% CI 0.02 to 0.06). For follow-up longer than one year there was a statistically nonsignificant effect (SMD 0.02, 95% CI -0.00 to 0.02).Twenty-five studies reported data on the Point Prevalence of Smoking (Group 3), though heterogeneity in this group was too high for data to be pooled.We were unable to analyse data for 49 studies (N = 152,544).Subgroup analyses (Pure Prevention cohorts only) demonstrated that at longest follow-up for all curricula combined, there was a significant effect favouring adult presenters (OR 0.88, 95% CI 0.81 to 0.96). There were no differences between tobacco-only and multifocal interventions. For curricula with booster sessions there was a significant effect only for combined social competence and social influences interventions with follow-up of one year or less (OR 0.50, 95% CI 0.26 to 0.96) and at longest follow-up (OR 0.51, 95% CI 0.27 to 0.96). Limited data on gender differences suggested no overall effect, although one study found an effect of multimodal intervention at one year for male students. Sensitivity analyses for Pure Prevention cohorts and Change in Smoking Behaviour over time outcomes suggested that neither selection nor attrition bias affected the results.

AUTHORS' CONCLUSIONS

Pure Prevention cohorts showed a significant effect at longest follow-up, with an average 12% reduction in starting smoking compared to the control groups. However, no overall effect was detected at one year or less. The combined social competence and social influences interventions showed a significant effect at one year and at longest follow-up. Studies that deployed a social influences programme showed no overall effect at any time point; multimodal interventions and those with an information-only approach were similarly ineffective.Studies reporting Change in Smoking Behaviour over time did not show an overall effect, but at an intervention level there were positive findings for social competence and combined social competence and social influences interventions.

School-based programmes for preventing smoking

BACKGROUND

Smoking rates in adolescents are rising in some countries. Helping young people to avoid starting smoking is a widely endorsed goal of public health, but there is uncertainty about how to do this. Schools provide a route for communicating with a large proportion of young people, and school-based programmes for smoking prevention have been widely developed and evaluated.

OBJECTIVES

To review all randomized controlled trials of behavioural interventions in schools to prevent children (aged 5 to12) and adolescents (aged 13 to18) starting smoking.

SEARCH STRATEGY

We searched the Cochrane Central Register of Controlled Trials (CENTRAL) and the Cochrane Tobacco Addiction Group's Specialized Register, MEDLINE, EMBASE, PsyclNFO, ERIC, CINAHL, Health Star, Dissertation Abstracts and studies identified in the bibliographies of articles. Individual MEDLINE searches were made for 133 authors who had undertaken randomized controlled trials in this area.

SELECTION CRITERIA

Types of studies: those in which individual students, classes, schools, or school districts were randomized to the intervention or control groups and followed for at least six months.

TYPES OF PARTICIPANTS

Children (aged 5 to12) or adolescents (aged 13 to18) in school settings. Types of interventions: Classroom programmes or curricula, including those with associated family and community interventions, intended to deter use of tobacco. We included programmes or curricula that provided information, those that used social influences approaches, those that taught generic social competence, and those that included interventions beyond the school into the community. We included programmes with a drug or alcohol focus if outcomes for tobacco use were reported. Types of outcome measures: Prevalence of non-smoking at follow up among those not smoking at baseline. We did not require biochemical validation of self-reported tobacco use for study inclusion.

DATA COLLECTION AND ANALYSIS

We assessed whether identified citations were randomized controlled trials. We assessed the quality of design and execution, and abstracted outcome data. Because of the marked heterogeneity of design and outcomes, we computed pooled estimates only for those trials that could be analyzed together and for which statistical data were available. We predominantly synthesized the data using narrative systematic review. We grouped studies by intervention method (information; social competence; social influences; combined social influences/social competence; multi-modal programmes). Within each group, we placed them into three categories (low, medium and high risk of bias) according to validity using quality criteria for reported study design.

MAIN RESULTS

Of the 94 randomized controlled trials identified, we classified 23 as category one (most valid). There was one category one study of information-giving and two of teaching social comeptence. There were thirteen category one studies of social influences interventions. Of these, nine found some positive effect of intervention on smoking prevalence, and four failed to detect an effect on smoking prevalence. The largest and most rigorous study, the Hutchinson Smoking Prevention Project, found no long-term effect of an intensive eight-year programme on smoking behaviour. There were three category one RCTs of combined social influences and social competence interventions: one provided significant results and one only for instruction by health educators compared to self-instruction. There was a lack of high quality evidence about the effectiveness of combinations of social influences and social competence approaches. There was one category one study providing data on social influences compared with information giving. There were four category one studies of multi-modal approaches but they provided limited evidence about the effectiveness of multi-modal approaches including community initiatives.

AUTHORS' CONCLUSIONS

There is one rigorous test of the effects of information-giving about smoking. There are well-conducted randomized controlled trials to test the effects of social influences interventions: in half of the group of best quality studies those in the intervention group smoke less than those in the control, but many studies failed to detect an effect of the intervention. There are only three high quality RCTs which test the effectiveness of combinations of social influences and social competence interventions, and four which test multi-modal interventions; half showed significant positive results.

Prevention of smoking-related deaths in the United States

BACKGROUND

Tobacco is the leading cause of death in the United States. The majority of people who smoke begin before age 18.

OBJECTIVE

Determine the number of smoking-attributable deaths and years of potential life lost (YPLL) in adults that might be saved through interventions to reduce smoking prevalence among children and adolescents.

METHODS

Calculation of the smoking-attributable mortality and years of potential life lost by age 85 among the cohort of people aged 18 in 2000.

RESULTS

By age 85, there would be 127,670 smoking-attributable deaths among women and 284,502 deaths among men, for a total 412,172 smoking-attributable deaths in the United States among the cohort of 3,964,704 people aged 18 years alive in 2000. Through large-scale multimedia campaigns and a $1 increase in the price per pack of cigarettes, smoking prevalence could be reduced by 26% and would result in an annual savings of 108,466 lives and 1.6 million YPLL.

CONCLUSIONS

Interventions to decrease smoking prevalence among children and adolescents can have large effects on adult mortality.

Curtailing tobacco use among youth: evaluation of project 4-health

This article reports the development and evaluation of Project 4-Health, a theory-driven, research-based program to prevent tobacco use among youth enrolled in 4-H clubs throughout California. Additional goals were to involve youth in discouraging others' tobacco use and to develop youth leadership for tobacco control. To assess program effectiveness, 72 clubs were matched and randomly assigned to the program or control condition. Of 1,853 eligible club members, 88.6% completed the pretest. Of these, 79.5% completed a posttest 4 months after conclusion of program delivery, and 77.6% completed a second posttest 2 years later.Short-term effects were found on 7 of 24 outcome measures, indicating changes in knowledge, attitudes, and behavioral intention, but not in social influence variables or behaviors. No long-term effects were observed. Discussion considers how the challenges of designing, delivering, and evaluating the intervention influenced results and implications for preventing tobacco use through community-based youth groups.

School-based programmes for preventing smoking

BACKGROUND

Smoking rates in adolescents are rising. Helping young people to avoid starting smoking is a widely endorsed goal of public health, but there is uncertainty about how to do this. Schools provide a route for communicating with a large proportion of young people, and school-based programmes for smoking prevention have been widely developed and evaluated.

OBJECTIVES

To review all randomised controlled trials of behavioural interventions in schools to prevent children (aged 5 to12) and adolescents (aged 13 to18) starting smoking.

SEARCH STRATEGY

We searched The Cochrane Controlled Trials and Tobacco Review group registers, MEDLINE, EMBASE, Psyclnfo, ERIC, CINAHL, Health Star, Dissertation Abstracts and studies identified in the bibliographies of articles. Individual MEDLINE searches were made for 133 authors who had undertaken randomised controlled trials in this area.

SELECTION CRITERIA

Types of studies: those in which individual students, classes, schools, or school districts were randomised to the intervention or control groups and followed for at least six months.

TYPES OF PARTICIPANTS

Children (aged 5 to12) or adolescents (aged 13 to18) in school settings. Types of interventions: Classroom programmes or curricula, including those with associated family and community interventions, intended to deter use of tobacco. We included programmes or curricula that provided information, those that used social influences approaches, those that taught generic social competence, and those that included interventions beyond the school into the community. We included programmes with a drug or alcohol focus if outcomes for tobacco use were reported. Types of outcome measures: Prevalence of non-smoking at follow-up among those not smoking at baseline. We did not require biochemical validation of self-reported tobacco use for study inclusion.

DATA COLLECTION AND ANALYSIS

We assessed whether identified citations were randomised controlled trials. We assessed the quality of design and execution, and abstracted outcome data. Because of the marked heterogeneity of design and outcomes, we did not perform a meta-analysis. We synthesised the data using narrative systematic review. We grouped studies by intervention method (information; social competence; social influences; combined social influences/social competence and multi-modal programmes). Within each category, we placed them into three groups according to validity using quality criteria for reported study design.

MAIN RESULTS

Of the 76 randomised controlled trials identified, we classified 16 as category one (most valid). There were no category one studies of information giving alone. There were fifteen category one studies of social influences interventions. Of these, eight showed some positive effect of intervention on smoking prevalence, and seven failed to detect an effect on smoking prevalence. The largest and most rigorous study, the Hutchinson Smoking Prevention Project, found no long-term effect of an intensive 8-year programme on smoking behaviour. There was a lack of high quality evidence about the effectiveness of combinations of social influences and social competence approaches. There was limited evidence about the effectiveness of multi-modal approaches including community initiatives.

REVIEWER'S CONCLUSIONS

There is no rigorous test of the effects of information giving about smoking. There are well-conducted randomised controlled trials to test the effects of social influences interventions: in half of the group of best quality studies those in the intervention group smoke less than those in the control, but many studies showed no effect of the intervention. There is a lack of high-quality evidence about the effectiveness of combinations of social influences and social competence interventions, and of multi-modal programmes that include community interventions.

Prospective social-psychological factors of adolescent smoking progression

PURPOSE

To evaluate the ability of social-psychological risk factors to predict adolescent smoking behavior.

METHODS

Nonsmoking adolescents (n = 4032) who participated in the 1989 and 1993 Teenage Attitudes and Practices Surveys (TAPS I) were selected for analyses. Four multivariate logistic models were used to examine (a) adolescents' smoking initiation, (b) adults' smoking initiation, (c) adolescents' progression to regular smoking, and (d) adults' progression to regular smoking. A series of social-psychological variables were measured.

RESULTS

All four models were significant. However, no social-psychological factors were consistently significant in all four models, except white ethnicity. Data showed that social-psychological factors are less able to predict the transition from nonsmoking to experimental smoking than that from nonsmoking to regular smoking.

CONCLUSIONS

Future prospective studies should measure both social-psychological and smoking acquisition factors at closer intervals to more accurately examine potential relationships.

Tobacco-refusal skills and tobacco use among high-risk adolescents

Psychosocial tobacco use prevention programs are based on the assumption that refusal skills training will have a suppressive effect on the onset of use by enabling non-using adolescents to refuse offers of cigarettes and smokeless tobacco. The present study investigated this assumption with 389 high-risk junior high-school students involved in a prevention program during their seventh, eighth, and ninth-grade years. Direct behavioral measures of refusal skills were taken by having subjects respond to audiotaped offers of tobacco and then rating the quality of their responses. These ratings were then linked to tobacco use measures obtained at the end of each of the 3 study years. Results showed that the comprehensive prevention program produced a favorable trend in delaying or preventing the onset of tobacco use. However, the refusal skills training, which was carried out throughout the 3-year intervention period, produced significant differences in overall refusal skill quality only at the seventh grade. Moreover, refusal skill quality was not related to overall tobacco use or cigarette use at any grade.

[Efficacy of smoking prevention campaign in adolescents: critical review of the literature]

This review is intended to assist those interested in smoking prevention in young people in choosing the most efficient and cost-effective methods. The importance of a critical analysis of the abundant literature available on the topic before implementing a new programme is stressed. In view of the present knowledge, preventive methods should start at age 12 and extend up to age 18 through actualizing sessions. The most promising programme should include learning to resist to social pressures and a cognitive and developmental approach which anchor smoking prevention in the psychological evolution of the adolescent. Training of peers being disproportionate in regard to what can be expected from their intervention, one key element is the teacher's training in the technique of changing behaviour. Evaluation of methodology and of long term results should belong to any programme.

Predictors of participation in a school-based anti-tobacco activism program

This study investigated the predictors of participation in a school-based, anti-tobacco activism program. Subjects in this study consisted of 7th grade students participating in the intervention component of Project S.H.O.U.T., a tobacco use prevention program in San Diego County, California. In the activism component, a newsletter containing an activism contest was distributed to each student. Small prizes were awarded to contest winners at each school. "Activism" included letter and petition writing, anti-tobacco poster contests, merchant education, peer surveys and magazine subscription cards. A total of 170 students participated in the activities, with 81.1 percent participating two or more times. Of those who participated, 59 percent were female and 60 percent were White, non-Hispanic. Two sets of logistic analyses were conducted. Variables such as SES, gender, ethnicity, friends' tobacco use and parental tobacco use were used to predict participation in activism activities. The choice of variables was intended to provide information regarding activism participation in reference to known tobacco risk factors. Results of the first analysis indicated that students with a higher SES, and in an urban vs. rural location were more likely to participate in the activism activities. The second analysis used the same set of characteristics to predict "ever-use" of tobacco. Results of this analysis indicated that male gender, low grades, White, non-Hispanic ethnicity, friends' and parents' tobacco use were positively associated with tobacco experimentation.

AIDS risk and prevention among adolescents

Although relatively few teenagers have been diagnosed with AIDS and the extent of asymptomatic human immunodeficiency virus (HIV) infection among adolescents remains largely unknown, there is cause for concern about teens' risk of contracting HIV disease The incubation period (the time from initial infection to the development of full-blown AIDS) is estimated to average eight years, and therefore it is probable that most of the individuals in their twenties who have AIDS (20% of all the people with AIDS) contracted HIV during their teenage years. The sexual and drug use activities of many teenagers place them at increased risk for HIV transmission. Sexually transmitted diseases (STDs) are pervasive and a major cause of morbidity among sexually active adolescents. The rates of STDs have continued to rise even during the 'age of AIDS'. These rates are of concern since the behaviors associated with the acquisition and transmission of STDs are also the behaviors associated with HIV transmission. In addition, the presence of STDs may increase the likelihood of HIV transmission. Although condoms reduce the risk of HIV transmission, their use remains low among sexually active teenagers. Reducing or eliminating high risk behaviors is the only way to limit further spread of HIV. Effective prevention programs should be based on models and theories of risk behavior so that the programs can be designed to change those factors which lead to the undesirable risky behaviors. The AIDS Risk Reduction Model (ARRM) is presented as an example of such a social-physiological model. The ARRM model characterizes why people persist in engaging in high risk activities or make efforts to alter those activities. The three stages theorized to be necessary to reduce risky sexual activities are: (1) recognizing that one's activities make oneself vulnerable to contracting HIV; (2) making the decision to alter risky sexual behaviors and committing to that decision; (3) overcoming barriers to enacting the decision, including problems in sexual communication and seeking help when necessary to learn strategies to reduce risky behaviors. Each stage includes a number of constructs identified in prior research as important for engaging in 'healthy' or low risk behaviors. Innovative strategies must be developed and implemented to reach all adolescents, ranging from teenagers who attend school and live with their families to those teens who are runaways, live in detention facilities or are otherwise 'disenfranchised'. To be most effective, HIV prevention programs must utilize strategies which combine cognitive and behavioral skills training.(ABSTRACT TRUNCATED AT 400 WORDS)

Assessing skills for refusing cigarettes and smokeless tobacco

Hops and colleagues developed an audiotaped refusals skills test in which students respond to cigarette offers and their responses are scored for content. The present study employed a modified analogue skills test. Modifications included adding a separate subscale for smokeless tobacco, emphasizing repeated offers and group pressure, and rating the quality of responses (good, fair, poor). The test was evaluated in four seventh-grade classrooms (N = 78). Half had participated in a refusals skills training program; the others were controls. Intervention subjects provided more "good" responses and fewer "poor" responses than controls. In a multiple regression, repeated and group offers were associated with the quality of response, while offerer's gender and type of tobacco variables were not associated. In a second regression, experimental condition was associated with quality of the responses, while gender, ethnicity, exposure to tobacco, use of tobacco, and attitudes toward the test were not associated.

The television, school and family smoking prevention/cessation project. IV. Controlling for program success expectancies across experimental and control conditions

A major issue in smoking prevention research is that no study has tried to equate program success expectancies across experimental and placebo control conditions. Equivalent overall program success expectancies should be established to help rule out the effects of extra-theoretical variables which influence program outcomes. The present study tested whether an attention-placebo (information based) smoking prevention program would produce equivalent expectancies about the likelihood of program success in comparison to an experimental social influences program. To try to equate program success expectancies, the design of the two programs differed in content but was similar in procedure. Fourteen middle schools were randomly assigned to the two conditions. As hypothesized, baseline expectancies were found to predict outcome measures, even after controlling for baseline smoking intentions, ethnic group, and gender. Second, the equivalence of program expectancies at posttest was tested. Youths held equivalent overall expectancies for success across conditions. This study suggested the need to control for program expectancies in prevention research, and showed that program expectancies could be controlled for by equating process of program delivery.

Hispanic youth, substance abuse, and stress: implications for prevention research

Hispanic adolescents are the fastest growing ethnic-minority age group in America. They are also at high risk for drug, alcohol, and tobacco use. In this paper, the authors discuss the etiology of Hispanic adolescents' substance abuse, as explained in part by psychological stress. Based on the authors' research and on other data, a model for preventing substance abuse among Hispanic youths is presented. The model draws from coping, acculturation, social learning, and informal network theories. Concluding with a research agenda, the paper calls for descriptive, correlative, and intervention outcome studies to scientifically understand and prevent substance use among Hispanic adolescents.