Predicting the onset of smoking in boys and girls

Boys and girls smoking within the Danish elementary school classes: a group-level analysis

Aims: To quantify the correlation between male and female smoking prevalence in elementary school classes by group-level analysis. Methods: This study was the Danish contribution to the cross-national study Health Behaviour in School-Aged Children (HBSC) 1998. Ninety school classes at grade nine (1,515 students) from a random sample of schools in Denmark took part. The proportion of male and female "at all '' smokers and daily smokers in the school class was calculated. Results: The mean "at all'' smoking proportion in the school classes is 39% for girls and 32% for boys. The proportion of male and female smokers within school classes does not correlate. There is high variation in male and female smoking behaviour between school classes. Conclusions: The infl uence of social classroom environment on the processes causing smoking behaviour may be different for boys and girls. This paper illustrates that group-level analysis provides valuable new knowledge.

Cigarette Smoking Habits among High School Boys in the United Arab Emirates

This study reports on findings of a survey of smoking behavior and attitudes of approximately 1500 public secondary school boys in three major cities of the United Arab Emirates (UAE), one of the most rapidly developing societies in the world. Using an adaptation of the World Health Organizations Smoking Questionnaire and a multi-stage cluster sample of public schools and classes, the survey determined that 18.9 percent were current smokers and another 28.2 percent had smoking experience but were not active at the time of the study. The majority of smokers were not UAE nationals and had begun smoking between the ages of ten to fifteen. Almost 60 percent of current smokers reported modest consumption of one to six cigarettes daily and nearly two-thirds reported a desire to stop their smoking. Smokers also were much more likely to come from families in which other family members smoked. Implications of findings for prevention programs point to a broad public and school-based effort for the UAE.

Smokers’ Representations of Their Own Smoking: A Q-Methodological Study

Little work has addressed how smokers represent their own smoking rather than smoking in general. Research has identified a huge number of variables that contribute to smoking, yet not much is known about how smokers ‘make sense’ of these and construct explanations of the factors that contribute to their own smoking. This study used Q-methodology to investigate smokers’ own representations of their smoking behaviour. Analysis revealed four main factors: smoking as a social tool; the dual identity smoker; reactionary smoking; and smoking as a social event. We argue that an understanding of the diversity of smokers’ representations and explanations of their own smoking could play a useful role in developing more effective targeted interventions.

A longitudinal study on determinants of the intention to start smoking among Non-smoking boys and girls of high and low socioeconomic status

BACKGROUND

This study identifies differences in socio-cognitive factors as they relate to the intention to smoke among boys and girls living in high socioeconomic status (HSES) and low socioeconomic status (LSES) neighborhoods.

METHODS

A total of 1,643 children (aged 10-12 years) completed a web-based questionnaire assessing their intention, attitude, social influences, and self-efficacy toward smoking at baseline and at one year follow-up. Logistic regression analyses were conducted to examine the relations between intention and predictor variables (i.e. attitude, social influence, and self-efficacy). Three-way interaction terms were added to the first analysis to examine potential interactions of gender, socioeconomic status and predictor variables. A 3-way interaction effect was present, and therefore subgroup analyses for HSES and LSES boys and girls were warranted.

RESULTS

The results indicated that positive attitudes toward smoking were related to the intention to smoke among HSES boys, whereas HSES girls had higher intentions to smoke if they perceived fewer disadvantages of smoking (OR: 0.42; 95 % CI: 0.22-0.82). The intention to smoke among LSES boys was predicted by perceived social norms (OR: 0.49; 95 % CI: 0.25-0.93); in LSES girls, the smoking behavior of people in their environment was most strongly related to their smoking intention (OR: 5.55; 95 % CI: 2.81-10.93).

CONCLUSIONS

To prevent youth smoking, HSES boys and girls may benefit from interventions that address attitudes. Boys from an LSES neighborhood may profit from smoking prevention interventions that target social norms, while LSES girls may benefit from strategies aimed at resisting the influence of smokers in their environment.

TRIAL REGISTRATION

The 'Fun without Smokes' study is approved by the Medical Ethics Committee of the Atrium-Orbis-Zuyd Hospital (NL32093.096.11/MEC 11-T-25) and registered in the Dutch Trial Register ( NTR3116 ).

Invited commentary: Parental smoking as a risk factor for adult tobacco use: can maternal smoking during pregnancy be distinguished from the social environmental influence during childhood?

Parental smoking is known to have prenatal health effects on developing fetuses, and postnatal exposure to secondhand smoke causes adverse health effects during childhood and beyond. Further, there is solid evidence that parental smoking during childhood is a potent risk factor for smoking in offspring. In this issue of the Journal, Rydell et al. (Am J Epidemiol. 2014;179(12):1409-1417) add to a growing body of evidence showing that maternal smoking during pregnancy is statistically associated with the long-term risk of tobacco use in offspring. The data revealed a strong signal between maternal smoking during pregnancy and tobacco use in young adulthood, an association that was largely concentrated in snus use but not cigarette smoking. This new study adds to a growing body of epidemiologic evidence that consistently points toward maternal smoking during pregnancy being associated with an increased risk of offspring tobacco use in later life. There is also evidence from animal models indicating that fetal exposure to maternal nicotine use in utero can have a durable impact on the neural pathways that affect lifetime sensitivity to nicotine. This is an important research topic that continues to yield a consistent signal despite an array of inferential challenges.

Why do smokers start?

Most studies investigating the reasons for smoking initiation are based on adolescents or young individuals. We considered the issue in a large dataset on the general Italian population. Six population-based surveys on smoking were conducted annually from 2005 to 2010 on representative samples of Italian individuals aged 15 years or over, involving more than 3000 individuals each year. A specific question on the main reason to start smoking was asked to 7469 ever smokers. Overall, 59.9% of ever smokers started smoking before 18 years of age and 33.6% started smoking before 16 years of age. Among ever smokers, 61.1% reported having started smoking because of the influence of friends, 15.6% for enjoyment and satisfaction, 9.0% to feel mature and independent, 6.6% because of the influence of partner/family, 2.5% because of stress, 1.9% to feel more secure and 1.8% for curiosity. The finding that the majority of Italian men and women - particularly those who started smoking at a young age - started smoking because of the influence of friends suggests that antismoking campaigns should consider social influence, resistance and the dimension of self-esteem. An improvement in the legislation prohibiting the purchase of tobacco products by minors aged less than 18 years and a smoking ban in school courtyards are urgently required in Italy.

Correlates of chilean adolescents' negative attitudes toward cigarettes: the role of gender, peer, parental, and environmental factors

INTRODUCTION

We examined the association of peer, parental, and environmental factors with negative attitudes toward cigarettes among youth from Santiago, Chile.

METHODS

A total of 860 youth from Santiago, Chile, completed questions regarding their lifetime use of cigarettes, intentions to smoke, attitudes toward cigarettes, and questions that assessed peer, parental, and environmental factors.

RESULTS

For both boys and girls, peer disapproval of smoking was associated with more negative attitudes toward cigarettes and peer smoking was associated with less negative attitudes toward cigarettes. Peer pressure was significantly associated with more negative attitudes toward cigarettes for girls only. Parental smoking was associated with less negative attitudes and parental control with more negative attitudes, but these associations were significant in the overall sample only. School prevention efforts and exposure to cigarette ads were not associated with cigarette attitudes. Difficulty in accessing cigarettes was positively associated with negative attitudes for boys and girls.

CONCLUSION

Smoking prevention efforts focus on attitude change, but scant information is available about the experiences that influence Chilean youth's attitudes toward cigarettes. Results from the current study suggest that prevention efforts could benefit from gender-specific strategies. Girls' but not boys' attitudes were influenced by peer pressure. Moreover, negative attitudes toward cigarettes were associated with lower current smoking in girls only. Parental smoking was an important influence on youth's attitudes toward cigarettes. Efforts to reduce smoking among Chilean youth may benefit from concurrently reducing parental smoking.

Impact of tobacco advertising and promotion on increasing adolescent smoking behaviours

BACKGROUND

The tobacco industry denies that their marketing is targeted at young nonsmokers, but it seems more probable that tobacco advertising and promotion influences the attitudes of nonsmoking adolescents, and makes them more likely to try smoking.

OBJECTIVES

To assess the effects of tobacco advertising and promotion on nonsmoking adolescents' future smoking behaviour.

SEARCH STRATEGY

We searched the Cochrane Tobacco Group specialized register, the Cochrane Central Register of Controlled Trials, MEDLINE, the Cochrane Library, Sociological Abstracts, PsycLIT, ERIC, WorldCat, Dissertation Abstracts, ABI Inform and Current Contents to August 2011.

SELECTION CRITERIA

We selected longitudinal studies that assessed individuals' smoking behaviour and exposure to advertising, receptivity or attitudes to tobacco advertising, or brand awareness at baseline, and assessed smoking behaviour at follow ups. Participants were adolescents aged 18 or younger who were not regular smokers at baseline.

DATA COLLECTION AND ANALYSIS

Studies were prescreened for relevance by one reviewer. Two reviewers independently assessed relevant studies for inclusion. Data were extracted by one reviewer and checked by a second.

MAIN RESULTS

Nineteen longitudinal studies that followed up a total of over 29,000 baseline nonsmokers met inclusion criteria. The studies measured exposure or receptivity to advertising and promotion in a variety of ways, including having a favourite advertisement or an index of receptivity based on awareness of advertising and ownership of a promotional item. One study measured the number of tobacco advertisements in magazines read by participants. All studies assessed smoking behaviour change in participants who reported not smoking at baseline. In 18 of the 19 studies the nonsmoking adolescents who were more aware of tobacco advertising or receptive to it, were more likely to have experimented with cigarettes or become smokers at follow up. There was variation in the strength of association, and the degree to which potential confounders were controlled for.

AUTHORS' CONCLUSIONS

Longitudinal studies consistently suggest that exposure to tobacco advertising and promotion is associated with the likelihood that adolescents will start to smoke. Based on the strength and specificity of this association, evidence of a dose-response relationship, the consistency of findings across numerous observational studies, temporality of exposure and smoking behaviours observed, as well as the theoretical plausibility regarding the impact of advertising, we conclude that tobacco advertising and promotion increases the likelihood that adolescents will start to smoke.

Corporate externalities: a challenge to the further success of prevention science

The full benefit of prevention science will not be realized until we learn how to influence organizational practices. The marketing of tobacco, alcohol, and food and corporate advocacy for economic policies that maintain family poverty are examples of practices we must influence. This paper analyzes the evolution of such practices in terms of their selection by economic consequences. A strategy for addressing these critical risk factors should include: (a) systematic research on the impact of corporate practices on each of the most common and costly psychological and behavior problems; (b) empirical analyses of the consequences that select harmful corporate practices; (c) assessment of the impact of policies that could affect problematic corporate practices; and (d) research on advocacy organizations to understand the factors that influence their growth and to help them develop effective strategies for influencing corporate externalities.

What is learned from longitudinal studies of advertising and youth drinking and smoking? A critical assessment

This paper assesses the methodology employed in longitudinal studies of advertising and youth drinking and smoking behaviors. These studies often are given a causal interpretation in the psychology and public health literatures. Four issues are examined from the perspective of econometrics. First, specification and validation of empirical models. Second, empirical issues associated with measures of advertising receptivity and exposure. Third, potential endogeneity of receptivity and exposure variables. Fourth, sample selection bias in baseline and follow-up surveys. Longitudinal studies reviewed include 20 studies of youth drinking and 26 studies of youth smoking. Substantial shortcomings are found in the studies, which preclude a causal interpretation.

Comparing the effects of entertainment media and tobacco marketing on youth smoking in Germany

AIMS

To examine differential effects of smoking in films and tobacco advertising on adolescent smoking. We hypothesize that movie smoking will have greater effects on smoking initiation, whereas tobacco advertising receptivity will primarily affect experimentation.

DESIGN

Longitudinal observational study of adolescents.

SETTING

School-based surveys conducted in Schleswig-Holstein, Germany.

PARTICIPANTS

A total of 4384 adolescents age 11-15 years at baseline and re-surveyed 1 year later; ever smoking prevalence was 38% at time 1.

MEASUREMENTS

The main outcome variable combined two items assessing life-time and current smoking (alpha = 0.87). Baseline never smokers were analyzed separately from those who had tried smoking (ever smokers). Exposure to smoking in 398 internationally distributed US movies was modeled as a continuous variable, with 0 corresponding to the 5th percentile and 1 to the 95th percentile of exposure. Tobacco marketing receptivity consisted of naming a brand for a favorite tobacco advertisement. Ordinal logistic regressions controlled for socio-demographics, other social influences, personality characteristics of the adolescent and parenting style.

FINDINGS

Whereas 34% of ever smokers were receptive to tobacco marketing at time 1, only 6% of never smokers were. Among time 1 never smokers, exposure to movie smoking was a significantly stronger predictor of higher time 2 smoking level [adjusted proportional odds ratio = 2.76, 95% confidence interval (1.84, 4.15)] than was tobacco marketing receptivity (1.53 [1.07, 2.20]). Among time 1 ever smokers, both tobacco marketing receptivity and exposure to movie smoking predicted higher levels of time 2 smoking [2.17 (1.78, 2.63) and 1.62 (1.18, 2.23), respectively], and the two estimates were not significantly different.

CONCLUSIONS

In this longitudinal study, exposure to movie smoking was a stronger predictor of smoking initiation than tobacco marketing receptivity, which was more common among ever smokers. The results suggest that entertainment media smoking should be emphasized in programs aimed at preventing onset, and both exposures should be emphasized in programs aimed at experimental smokers.

Comparing the effects of entertainment media and tobacco marketing on youth smoking

OBJECTIVES

To examine the concurrent effects of exposure to movie smoking and tobacco marketing receptivity on adolescent smoking onset and progression.

METHODS

Cross-sectional study of 4524 northern New England adolescents aged 10-14 in 1999 with longitudinal follow-up of 2603 baseline never-smokers. Cross-sectional outcomes included ever tried smoking and higher level of lifetime smoking among 784 experimenters. The longitudinal outcome was onset of smoking among baseline never-smokers two years later. Movie smoking exposure was modelled as four population quartiles, tobacco marketing receptivity included two levels-having a favourite tobacco advert and wanting/owning tobacco promotional items. All analyses controlled for sociodemographics, other social influences, personality characteristics of the adolescent and parenting style.

RESULTS

In the full cross-sectional sample, 17.5% had tried smoking; both exposure to movie smoking and receptivity to tobacco marketing were associated with having tried smoking. Among experimental smokers, the majority (64%) were receptive to tobacco marketing, which had a multivariate association with higher level of lifetime smoking (movie smoking did not). In the longitudinal study 9.5% of baseline never-smokers tried smoking at follow-up. Fewer never-smokers (18.5%) were receptive to tobacco marketing. Movie smoking had a multivariate association with trying smoking (receptivity to tobacco marketing did not).

CONCLUSIONS

The results suggest separate roles for entertainment media and tobacco marketing on adolescent smoking. Both exposures deserve equal emphasis from a policy standpoint.

Perceived peer influence and peer selection on adolescent smoking

Despite advances in tobacco control, adolescent smoking remains a problem. The smoking status of friends is one of the highest correlates with adolescent smoking. This homophily (commonality of friends based on a given attribute) may be due to either peer pressure, where adolescents adopt the smoking behaviors of their friends, or peer selection, where adolescents choose friends based on their smoking status. This study used structural equation modeling to test a model of peer influence and peer selection on ever smoking by adolescents. The primary analysis of the model did not reach significance, but post hoc analyses did result in a model with good fit. Results indicated that both peer influence and peer selection were occurring, and that peer influence was more salient in the population than was peer selection. Implications of these results for tobacco prevention programs are discussed.

Predictors of smoking stage transitions for adolescent boys and girls

BACKGROUND

Aim of this study was to identify predictors of transition from never smoking to smoking monthly or more often in a European sample of adolescents. To show whether predictors differed between genders, analyses were run for boys and girls separately.

METHODS

From six European countries, 4055 never smokers participated at baseline (1998). One year later, respondents were asked to indicate their smoking status. Respondents were categorized as smoker (smoking monthly or more) or non-smoker (smoking less than monthly). The predictive qualities of predisposing, motivational and intentional concepts were assessed using logistic regression analyses.

RESULTS

Girls were more likely to be a smoker at follow-up. More spending money, modeling from parents and a higher intention to start smoking were predictive of smoking uptake in both genders. Boys were more likely to start smoking when perceiving less cons of smoking, drinking more alcohol and perceiving a social norm towards not smoking from parents. Girls experiencing higher social pressure to smoke from friends were more likely to start smoking.

CONCLUSIONS

Separate uptake prevention interventions for boys and girls do not seem warranted. Boys may benefit from a program also addressing other deviant behaviors. Girls should continue to be supplied with specific skills to resist social pressure.

Which sociodemographic factors are important on smoking behaviour of high school students? The contribution of classification and regression tree methodology in a broad epidemiological survey

BACKGROUND

The purpose of this study is to evaluate the most important sociodemographic factors on smoking status of high school students using a broad randomised epidemiological survey.

METHODS

Using in-class, self administered questionnaire about their sociodemographic variables and smoking behaviour, a representative sample of total 3304 students of preparatory, 9th, 10th, and 11th grades, from 22 randomly selected schools of Mersin, were evaluated and discriminative factors have been determined using appropriate statistics. In addition to binary logistic regression analysis, the study evaluated combined effects of these factors using classification and regression tree methodology, as a new statistical method.

RESULTS

The data showed that 38% of the students reported lifetime smoking and 16.9% of them reported current smoking with a male predominancy and increasing prevalence by age. Second hand smoking was reported at a 74.3% frequency with father predominance (56.6%). The significantly important factors that affect current smoking in these age groups were increased by household size, late birth rank, certain school types, low academic performance, increased second hand smoking, and stress (especially reported as separation from a close friend or because of violence at home). Classification and regression tree methodology showed the importance of some neglected sociodemographic factors with a good classification capacity.

CONCLUSIONS

It was concluded that, as closely related with sociocultural factors, smoking was a common problem in this young population, generating important academic and social burden in youth life and with increasing data about this behaviour and using new statistical methods, effective coping strategies could be composed.

Tobacco promotion and the initiation of tobacco use: assessing the evidence for causality

OBJECTIVE

We sought to determine whether there is evidence of a causal link between exposure to tobacco promotion and the initiation of tobacco use by children.

METHODS

We conducted a structured search in Medline, PsycINFO, and ABI/INFORM Global to identify relevant empirical research. The literature was examined against the Hill epidemiologic criteria for determining causality.

RESULTS

(1) Children are exposed to tobacco promotion before the initiation of tobacco use; (2) exposure increases the risk for initiation; (3) there is a dose-response relationship, with greater exposure resulting in higher risk; (4) the increased risk is robust; it is observed with various study methods, in multiple populations, and with various forms of promotion and persists after controlling for other factors; (5) scientifically plausible mechanisms whereby promotion could influence initiation exist; and (6) no explanation other than causality can account for the evidence.

CONCLUSIONS

Promotions foster positive attitudes, beliefs, and expectations regarding tobacco use. This fosters intentions to use and increases the likelihood of initiation. Greater exposure to promotion leads to higher risk. This is seen in diverse cultures and persists when other risk factors, such as socioeconomic status or parental and peer smoking, are controlled. Causality is the only plausible scientific explanation for the observed data. The evidence satisfies the Hill criteria, indicating that exposure to tobacco promotion causes children to initiate tobacco use.

The incidence of smoking and risk factors for smoking initiation in medical faculty students: cohort study

BACKGROUND

Medical education requires detailed investigation because it is a period during which the attitudes and behaviors of physicians develop. The purpose of this study was to calculate the yearly smoking prevalence and incidence rates of medical faculty students and to identify the risk factors for adopting smoking behaviour.

METHODS

This is a cohort study in which every student was asked about their smoking habits at the time of first registration to the medical faculty, and was monitored every year. Smoking prevalence, yearly incidence of initiation of smoking and average years of smoking were calculated in analysis.

RESULTS

At the time of registration, 21.8% of the students smoked. At the end of six years, males had smoked for an average of 2.6 +/- 3.0 years and females for 1.0 +/- 1.8 years (p < 0.05). Of the 93 medical students who were not smokers at the time of registration, 30 (32.3%) were smokers at the end of the 6 years of the course.

CONCLUSION

The first 3 years of medical education are the most risky period for initiation of smoking. We found that factors such as being male, having a smoking friend in the same environment and having a high trait anxiety score were related to the initiation of smoking. Targeted smoking training should be mandatory for students in the Medical Faculty.

Perceived smoking environment and smoking initiation among multi-ethnic urban girls

PURPOSE

To examine associations between the perceived smoking environment and smoking initiation among urban multi-ethnic adolescent girls in New York City.

METHODS

Self-report surveys completed in grades 7, 8, and 9 assessed girls' (n = 858) smoking initiation, and perceived smoking environment (family smoking, friends' smoking, smoking norms, and cigarette availability). Carbon monoxide breath samples were collected from girls using a variation of the bogus pipeline procedure.

RESULTS

Differences were found in smoking prevalence with white girls reporting the highest prevalence of smoking at baseline and greatest increase in smoking prevalence from seventh to eighth grade. Black girls reported an initial increase in smoking prevalence from seventh to eighth grade followed by a decrease from eighth to ninth grade. Family smoking, friends' smoking, smoking norms, and cigarette availability were all associated with smoking initiation at eighth grade but only friends' smoking was associated with smoking initiation at ninth grade. Few ethnic differences were found in risk factors at baseline and racial/ethnic group did not modify associations between risk and smoking initiation.

CONCLUSIONS

Urban adolescent girls of different racial/ethnic backgrounds had similar perceptions of the smoking environment. Despite the similarity of risk factors across racial/ethnic groups, urban white girls are at increased risk to initiate smoking. Preventive interventions that target girls' perceived smoking environment during early adolescence should be effective across ethnic groups.

School connectedness and daily smoking among boys and girls: the influence of parental smoking norms

BACKGROUND

The objective was to test whether an association between school connectedness and smoking exists among Danish school children, and if so, to examine whether parental smoking attitude and parental smoking behaviour influenced this association.

METHODS

Data were collected by the Danish contribution to the cross-national study Health Behaviour in School-Aged Children (HBSC) 1998. Analyses were performed on questionnaire-based data from 1537 students at grade nine from a random sample of schools in Denmark.

RESULTS

An independent inverse association was found between school connectedness and smoking among both boys and girls. Parents' attitude to their children's smoking significantly modified this association among boys. Among girls the modifying effect was less marked. Neither among boys nor girls did parental smoking behaviour significantly modify the association between school connectedness and smoking, although a modifying tendency was observed among girls.

CONCLUSIONS

The smoking behaviour of Danish adolescents may be influenced by complicated interactions of varying sets of experienced smoking norms, and any research project or preventive programme focusing on the influence of school life on adolescent smoking behaviour needs to consider the family smoking norms. Additionally, the results stress the important role of gender by indicating that the smoking behaviour of girls may be more sensitive to restricting social influences than the smoking behaviour of boys.

Smoking as a symbol of friendship: Qualitative study of smoking behavior and initiation of a group of male nurse students in Iran

The study of smoking initiation and behavior of nurses and nurse students is important when considering their professional health promotion roles. In the present qualitative study, 26 nursing students of all grades from two nursing schools in the capital city of Iran were surveyed to explore their reasons for smoking. Through in-depth and semistructured interviews, participants were encouraged to talk about their smoking behavior and explain initiating reasons freely. Majority of the participants began smoking before commencing nursing, while only a few initiated smoking after entering into nursing school. Reasons for smoking included belonging to a group and as a symbol of friendship and mutual trust. Indeed, peer group behaviors influenced most participates to commence smoking and social influences also emerged as a theme in this study.

Why do primary school children smoke? A longitudinal analysis of predictors of smoking uptake during pre-adolescence

The objectives of this longitudinal study were to determine the prevalence of smoking among primary school children in Liverpool, and to identify the predictors of experimentation with cigarettes during pre-adolescence. A cohort of children (n = 270) completed questionnaires that elicited patterns of child smoking behaviour and children's experiences of smoking in their families and communities each year between the ages of 9 and 11 years. Parents also completed questionnaires. Children's first trials with cigarettes and repeated smoking were reported. The independent variables measured were socio-economic status, familial and peer smoking, and intentions to smoke. By age 11, 27% of children had tried smoking, 12% had smoked repeatedly and 3% were smoking regularly. Variables measured at age 9 predicting experimentation with cigarettes by age 11 were male gender 9P = 0.041) paternal smoking (P = 0.001) fraternal smoking (P = 0.017) a best friend who smoked (P = 0.026) and knowing someone with a smoking-related disease (P = 0.006) Intentions to smoke at age 9 did not predict smoking at age 11 (P < 0.001). In univariate analyses, child smoking was also associated with maternal smoking (P = 0.002 at age 11), living in a low-income household (P < 0.001 at age 10) and living in a deprived area ( P = 0.025 at age 11). Early smoking presents a considerable challenge to health promoters, not least because it is socially patterned. The interventions required must tackle the structural and social pressures that shape smoking behaviour during childhood.

Epidemiology of substance use disorders in women

Significant gender differences exist in the prevalence of substance use disorders in the United States. There is a trend among boys and girls aged 12 to 17 years toward comparable rates of use and initiation for alcohol, cocaine, heroin, and tobacco. If this trend continues, over time there may be a narrowing of the male-to-female prevalence ratios of substance abuse in the older age groups. This possibility is particularly disturbing because women have a heightened vulnerability to medical, physical, mental, and social consequences of substance use. Women also carry additional unique risks during pregnancy because of the effect on neonates. In addition, they have certain gender-specific cancer risks. Given this and the declining age of initiation of substance use in women, prevention and treatment efforts especially geared toward women (eg, education of all medical and paramedical staff, screening in primary care clinics, detection of drug use early in pregnancy or before conception, brief interventions and treatment programs that integrate women's needs) are exceedingly important to stop and ultimately reverse this growing trend.

Perceptions of the at-risk nonsmoker: are potential intervention topics being overlooked?

This study assesses how adolescent nonsmokers, at-risk smokers, and smokers differ in perceptions of smoking harms, benefits, and safety. While small differences exist when comparing attitudes and knowledge concerning short- and long-term benefits of smoking, large differences arise when attitudes and knowledge concerning the short-term benefits and the safety of casual smoking are compared.

Familial influences on adolescent smoking

The family unit is the primary source of transmission of basic social, cultural, genetic, and biological factors that may underlie individual differences in smoking. Existing information on the role of familial factors in tobacco use is characterized by two separate, but somewhat overlapping, lines of research: genetic epidemiological studies and risk-factor research. The present paper summarizes and evaluates studies assessing the association between adolescent smoking and parent and sibling smoking behaviors. A review of 87 studies reveals that methods are limited by a lack of standardized instruments, failure to measure important confounding and mediating factors, reliance on cross-sectional designs and the use of inconsistent definitions of tobacco-related behavior and assessment procedures. Moreover, there are no systematic family studies of the acquisition and continuation of smoking that have employed contemporary methodological standards for examining familial aggregation of tobacco behaviors among adolescents. Findings across studies show weak and inconsistent associations between parent and adolescent smoking; inconsistent findings may be attributed to methodological issues or associated factors that may complicate the relation between parent and adolescent smoking. Sibling and peer smoking show greater associations with adolescent smoking. Suggestions for future research include contemporary family studies that delineate meaningful phenotypes of tobacco use and prospective work on the later stages of tobacco use and the timing of the influence and valence of parent and family factors. Integration of the risk factor approach within the family study design may enrich both approaches to elucidate familial influences on smoking.

Trends in tobacco smoking among adolescents in Lyon, France

To provide information that may promote more effective cancer prevention, we identified factors associated with regular smoking among adolescents in Lyon, France. School grades where these factors began to influence regular smoking were also identified. Seven consecutive cross-sectional anonymous surveys were conducted in three public schools, beginning in grade 6ème (average age 11.5 years) in 1993 and ending in grade Terminale (average age 17.4 years) in 1999. All classes in each respective grade were surveyed, with 3650 completed questionnaires for all years combined. Prevalence of current regular smoking is presented according to school grade for 17 variables identified as significantly related to regular smoking in a multivariate logistic regression analysis. Important factors associated with regular smoking were identified as early as grade 6ème and included not viewing the taking care of one's health as important, not eating breakfast regularly, associating with groups where smoking occurs, having a best friend who smokes, and having a brother and/or sister who smokes. Not regularly reading was first associated with an increased risk of regular smoking in grade 5ème. Not living with both parents, alcohol drinking, episodes of drunkenness, illicit drug use, and sexual relationships were positively associated with regular smoking in the middle and later grades, when these questions were first asked. Not playing sports and not playing with computers were initially associated with an increased risk of regular smoking in grade 3ème.

Impact of tobacco advertising and promotion on increasing adolescent smoking behaviours

BACKGROUND

The tobacco industry denies that their marketing is targeted at young nonsmokers, but it seems more probable that tobacco advertising and promotion influences the attitudes of nonsmoking adolescents, and makes them more likely to try smoking.

OBJECTIVES

To assess the effects of tobacco advertising and promotion on nonsmoking adolescents' future smoking behaviour.

SEARCH STRATEGY

We searched the Cochrane Tobacco Group specialized register, the Cochrane Central Register of Controlled Trials, MEDLINE, the Cochrane Library, Sociological Abstracts, PsycLIT, ERIC, WorldCat, Dissertation Abstracts, ABI Inform and Current Contents to August 2002.

SELECTION CRITERIA

We selected longitudinal studies that assessed individuals' smoking behaviour and exposure to advertising, receptivity or attitudes to tobacco advertising, or brand awareness at baseline, and assessed smoking behaviour at follow-ups. Participants were adolescents aged 18 or younger who were not regular smokers at baseline.

DATA COLLECTION AND ANALYSIS

Studies were prescreened for relevance by one reviewer. Two reviewers independently assessed relevant studies for inclusion. Data were extracted by one reviewer and checked by a second.

MAIN RESULTS

Nine longitudinal studies that followed up a total of over 12,000 baseline nonsmokers met inclusion criteria. The studies measured exposure or receptivity to advertising and promotion in a variety of ways, including having a favourite advertisement or an index of receptivity based on awareness of advertising and ownership of a promotional item. One study measured the number of tobacco advertisements in magazines read by participants. All studies assessed smoking behaviour change in participants who reported not smoking at baseline. In all studies the nonsmoking adolescents who were more aware of tobacco advertising or receptive to it, were more likely to have experimented with cigarettes or become smokers at follow-up. There was variation in the strength of association, and the degree to which potential confounders were controlled for.

REVIEWER'S CONCLUSIONS

Longitudinal studies consistently suggest that exposure to tobacco advertising and promotion is associated with the likelihood that adolescents will start to smoke. Based on the strength of this association, the consistency of findings across numerous observational studies, temporality of exposure and smoking behaviours observed, as well as the theoretical plausibility regarding the impact of advertising, we conclude that tobacco advertising and promotion increases the likelihood that adolescents will start to smoke.

Ethnicity, gender and risk factors for smoking initiation: an overview

Although the prevalence of cigarette smoking has increased dramatically among youth over the past several years, there are significant ethnic and gender differences in prevalence rates. This paper presents highlights of the research literature on ethnic and gender differences in risk factors for smoking. The effects of peer and family influences may vary by both ethnicity and gender. White youth, especially females, may be more susceptible to the negative influence of friends' smoking than are African-American youth. Although the evidence about the relative importance of parent smoking among ethnic groups is contradictory, recent data suggest that African-American parents provide stronger anti-smoking messages than do white parents. The subgroups also vary in their perceptions of the negative consequences of smoking, with Asian-American and African-American females perceiving stronger negative consequences. Cultural expectations may place white females at increased risk for smoking. The link between depressed mood and smoking also varies by subgroup. Finally, popular media figures may influence the appeal of smoking and be differentially relevant to youth subgroups. We need: (1) specific examinations of ethnic and gender effects with attention paid to identifying protective factors among certain ethnic/gender subgroups; (2) to know more about how family influences may vary by the ethnic/gender subgroups and over the developmental course of smoking; (3) to know more about how youth cope with negative moods and the role of smoking in coping; and (4) to investigate whether the factors that protect youth in some subgroups can be diffused to others.

Smoking in young adolescents: an approach with multilevel discrete choice models

STUDY OBJECTIVE

To understand the context for tobacco smoking in young adolescents, estimating the effects of individual, family, social, and school related factors.

DESIGN

Cross sectional analysis performed by multilevel logistic regression with pupils at the first level and schools at the second level. The data came from a stratified sample of students surveyed on their own, their families' and their friends' smoking habits, their schools, and their awareness of cigarette prices and advertising.

SETTING

The study was performed in the Island of Gran Canaria, Spain.

PARTICIPANTS

1877 students from 30 secondary schools in spring of 2000 (model's effective sample sizes 1697 and 1738).

MAIN RESULTS

14.2% of the young teenagers surveyed use tobacco, almost half of them (6.3% of the total surveyed) on a daily basis. According to the ordered logistic regression model, to have a smoker as the best friend increases significantly the probability of smoking (odds ratio: 6.96, 95% confidence intervals (CI) (4.93 to 9.84), and the same stands for one smoker living at home compared with a smoking free home (odds ratio: 2.03, 95% CI 1.22 to 3.36). Girls smoke more (odds ratio: 1.85, 95% CI 1.33 to 2.59). Experience with alcohol, and lack of interest in studies are also significant factors affecting smoking. Multilevel models of logistic regression showed that factors related to the school affect the smoking behaviour of young teenagers. More specifically, whether a school complies with antismoking rules or not is the main factor to predict smoking prevalence in schools. The remainder of the differences can be attributed to individual and family characteristics, tobacco consumption by parents or other close relatives, and peer group.

CONCLUSIONS

A great deal of the individual differences in smoking are explained by factors at the school level, therefore the context is very relevant in this case. The most relevant predictors for smoking in young adolescents include some factors related to the schools they attend. One variable stood out in accounting for the school to school differences: how well they enforced the no smoking rule. Therefore we can prevent or delay tobacco smoking in adolescents not only by publicising health risks, but also by better enforcing no smoking rules in schools.

Risky parental behavior and adolescent sexual activity at first coitus

Data from the National Longitudinal Study of Adolescent Health (Add Health) were used to examine the impact of parents' behavior on adolescents' sexual experience and contraceptive use. All else being equal, adolescents whose parents engage in risky behaviors are especially likely to be sexually active and to have had sex before age 15. These findings are only partly attributable to the link between parents' risky behaviors (smoking, drinking, driving without seatbelts) and adolescents' risky behaviors (smoking, drinking, delinquent activity, association with substance-using peers). Although parental behaviors are effective predictors of adolescents' sexual activity, they are not effective predictors of contraceptive use or of method choice at first coitus. Overall, parents with low levels of self-efficacy seem to be especially likely to have children at risk of engaging in problem behaviors.

Choosing to remain smoke-free: the experiences of adolescent girls

PURPOSE

To develop an understanding of the experiences of nonsmoking girls and determine how these girls avoid smoking.

METHODS

A grounded theory approach was used to direct the discovery of process(es) that nonsmoking females undertake to remain nonsmokers. Seventeen nonsmoking females between the ages of 13 and 17 years were interviewed using open-ended questions designed by the authors. The interviews were tape-recorded and then analyzed using the techniques described by Strauss and Corbin.

RESULTS

The data revealed that the process of remaining a nonsmoker is composed of three phases: making sense of smoking, rejecting smoking, and declaring oneself to be a nonsmoker. The process of remaining a nonsmoker appears to be rooted in developing self-confidence. As girls rejected smoking, self-confidence was boosted because they learned that their choice would be accepted and their strategies were effective in rejecting smoking.

CONCLUSIONS

The findings of this study offer new insights into the experiences of adolescent nonsmokers. Our assumption that there is a process that underlies remaining a nonsmoker was supported. The findings suggest that adolescents use several strategies in this process. These strategies are noteworthy because they offer those who work in the field of health promotion new insights into ways in which they might contribute to increasing the ranks of nonsmokers.

Smoking in adolescence do attitudes matter?

A number of factors have emerged as being associated with adolescent smoking. While theoretical evidence suggests that attitude can be an important factor influencing smoking, empirical findings are somewhat contradictory. The main goal of the present study has been to identify the characteristics/dimensions of attitudes toward smoking in adolescence. Data were collected among primary (Grades 7-8), and secondary (Grades 9-12) school students using randomly selected classes in Szolnok, Hungary (N= 261). The self-administered questionnaire consisted of questions on sociodemographics, smoking behavior, beliefs, and attitudes related to smoking (items adapted from The Students' Health and Lifestyle Study developed by the research team of The University of Western Ontario, Canada). Factor analysis of the statements concerning smoking gave five factors: antismoking attitude, liking attitude, worrying attitude, disliking attitude, and unrealistic attitude. Antismoking attitude proved to be the most important influencing factor of tobacco use, which was greatly independent from the number of smoking friends in boys and older adolescents. However, peer smoking could definitely moderate this attitude and thus the linkage between attitude and smoking activity in girls and younger adolescents. Our findings support the idea that antismoking interventions can be adapted to the target groups as programs may have different impact on boys and girls and on different age groups.

Smoking habits in a cohort of U.K. adolescents

Active smoking is an increasing problem amongst U.K. teenagers. The smoking habits of a cohort of 14-16-year-olds were determined and the association between regular active smoking and domestic and social factors investigated. Current smoking habits of a cohort of 2289 14-16-year-olds were assessed using a simple postal questionnaire. Data concerning potential factors associated with active smoking were collected from questionnaire completed by parents. Nine hundred and sixty-nine (44.8%) children admitted to having smoked at some time, with 562 (30.0%) having smoked in the previous 12 months. Three hundred and six (14.1%) children were regular smokers and 158 (51.6% of regular smokers, 7.3% of total cohort) smoked daily. Age, number of other children in the household, parental smoking, smoking sibling(s) and living in a single parent household were all independently associated with regular smoking. Regular smoking was a significant problem amongst this cohort of teenagers. Living with other smokers, age, household size and living with one parent all predicted a regular smoking habit.

Why can't we convince the young not to smoke?

Tobacco is the largest cause of preventable death and morbidity in the world. Significant progress has been made in national tobacco control programmes, followed by a significant reduction in smoking-associated diseases. However, other populations have taken up the habit and the worldwide surge in cigarette smoking by young people is particularly worrisome. Based on our own experience as well as reported data, we examined determinants of tobacco use, at the familial, peer and societal levels as well as various prevention strategies based on legislation, health promotion and society awareness. Reasons for failures include under-enforcement of legislation, uniform approach to diverse populations and too limited means. Recommendations for future actions should include integrated policies and health programmes. Most importantly, the society outlook on tobacco should be changed, making non-smoking the norm and the objective.

Positive and negative outcome expectations of smoking: implications for prevention

BACKGROUND

To inform the development of messages for tobacco prevention programs, we examined seven positive and five negative outcome expectations of smoking as risk factors for smoking uptake.

METHODS

A cross-sectional, self-administered survey of 471 students in grades 6-12 who were never or experimental smokers was performed. Logistic regression was used to examine the relationship between outcome expectations and susceptibility to becoming a smoker in the future, a measure of intent and resistance to peer smoking.

RESULTS

A total of 36.1% of the sample was susceptible to smoking. All positive outcome expectations showed a strong and significant association with susceptibility. Students were most likely to be susceptible if they believed they would enjoy smoking (OR = 29.4). Three of the five negative outcome expectations were significantly associated with susceptibility, but the strength of these associations was much lower than that observed for the positive expectations (OR = 0.5 to 0.6). A strong belief in the negative outcomes of smoking did not alter the association between susceptibility and positive outcome expectations.

CONCLUSIONS

These findings suggest that teaching adolescents and teens about the negative consequences of smoking is unlikely to change their intent to smoke. Preventive efforts should identify ways to address the positive expectations adolescents have about smoking, possibly by offering alternative means for achieving these outcomes.

Weight concerns, weight control behaviors, and smoking initiation

OBJECTIVE

To examine the cross-sectional relationships between weight concerns, weight control behaviors, and initiation of tobacco use among youths.

STUDY DESIGN

Smoking status, weight concerns, and weight control behaviors were assessed in a cross-sectional sample of 16 862 children, 9 to 14 years of age, in 1996. Logistic regression was used to examine the relationship between weight concerns, weight control behaviors, and early stages of smoking initiation (precontemplation, contemplation, and experimentation). All analyses were adjusted for age, body mass index, and known predictors of initiation.

RESULTS

Approximately 9% of participants had experimented with cigarettes, and 6% were contemplating cigarette smoking. Contemplation of tobacco use was associated with misperception of being overweight (boys: odds ratio [OR], 1.65; 95% confidence interval [CI], 1.10-2.48), unhappiness with appearance (girls: OR, 2.05; 95% CI, 1.48-2.84; boys: OR, 1.60; 95% CI, 1.05-2. 42), and a tendency to change eating patterns around peers (girls: OR, 2.87; 95% CI, 2.28-3.62; boys: OR, 1.83; 95% CI, 1.25-2.66). Experimentation with cigarettes was associated with daily exercise to control weight among boys (OR, 1.92; 95% CI, 1.07-3.43) and with monthly purging (OR, 2.54; 95% CI, 1.27-5.07) and daily dieting among girls (OR, 1.79; 95% CI, 1.09-2.96).

CONCLUSIONS

Our findings suggest that, among both girls and boys, contemplation of smoking is positively related to weight concerns. Experimentation seems to be positively related to weight control behaviors. It is important for both pediatricians and comprehensive school health programs to address healthy methods of weight maintenance and to dispel the notion of tobacco use as a method of weight control.

Psychosocial factors related to adolescent smoking: a critical review of the literature

OBJECTIVE

To extend the analysis of psychosocial risk factors for smoking presented in the United States surgeon general's 1994 report on smoking and health, and to propose a theoretical frame of reference for understanding the development of smoking.

DATA SOURCES

General Science Index, Medline, PsycLIT, Sociofile, Sociological Abstracts, and Smoking and Health. Holdings of the Addiction Research Foundation of Ontario Library as well as the authors' personal files.

STUDY SELECTION

Reviewed literature focused on studies that examined the association of sociodemographic, environmental, behavioural, and personal variables with smoking.

DATA SYNTHESIS

Adolescent smoking was associated with age, ethnicity, family structure, parental socioeconomic status, personal income, parental smoking, parental attitudes, sibling smoking, peer smoking, peer attitudes and norms, family environment, attachment to family and friends, school factors, risk behaviours, lifestyle, stress, depression/distress, self-esteem, attitudes, and health concerns. It is unclear whether adolescent smoking is related to other psychosocial variables.

CONCLUSIONS

Attempts should be made to use common definitions of outcome and predictor variables. Analyses should include multivariate and bivariate models, with some attempt in the multivariate models to test specific hypotheses. Future research should be theory driven and consider the range of possible factors, such as social, personal, economic, environmental, biological, and physiological influences, that may influence smoking behaviour. The apparent inconsistencies in relationships between parental socioeconomic status and adolescent disposable income need to be resolved as does the underlying constructs for which socioeconomic status is a proxy.

Psychosocial, school, and parent factors associated with recent smoking among early-adolescent boys and girls

BACKGROUND

Experimentation with smoking often begins during adolescence, but an adequate understanding of the factors associated with early initiation remains elusive.

METHODS

Sixth- to eighth-grade students (n = 4,263, 67.1% white, 23.5% black, 7.2% other) from seven middle schools were surveyed.

RESULTS

The overall prevalence of recent smoking (past 30 days) of 10.4% was similar for boys and girls and by race, but increased from 3.7% in sixth to 17.8% in eighth grade. In multiple logistic regression analyses positive outcome expectations, high perceived prevalence, deviance acceptance, and trouble at school were independently associated with smoking for both boys and girls. Among boys, problem-behaving friends, peer pressure, authoritative parenting, and mother's education and among girls, self-control problems, knowledgeable parents, and grade were independently associated with smoking.

CONCLUSIONS

This is one of the few studies to report an independent association between smoking and outcome expectations, the first study to report an independent effect for peer influences among boys only, and one of several to find a negative association between smoking and positive parenting behavior. These findings suggest that the effectiveness of preventive interventions might be improved by targeting parent, school, and student outcomes, including outcome expectations, deviance acceptance, and social norms for both boys and girls, peer influences among boys, and self-control among girls.

The effect of attitude on the development of adolescent cigarette use

The purpose of this study is to examine the relation of attitude toward smoking among never smokers to the growth or development of cigarette use during the adolescent years. Using Latent Growth Modeling, attitude toward smoking of 250 adolescents (48% male, 94% Caucasian), 11 to 15 years of age, who had not previously tried a cigarette, was related to the frequency of use at the next assessment, one year later, and growth in cigarette use across four subsequent years. The results indicated that attitude toward cigarettes significantly predicted both frequency of subsequent cigarette use and growth in use. These results suggest a need to focus prevention efforts on attitude change at an early age, prior to experimentation with cigarette use.

The degree and type of relationship between psychosocial variables and smoking status for students in grade 8: is there a dose-response relationship?

BACKGROUND

While most research focuses on simply analyzing the differences between smokers and non-smokers, dose-response analyses may be used to find evidence of the nature of the association between psychosocial variables and involvement with smoking in adolescence.

METHODS

For the study, 1,614 grade 8 students from Scarborough, Ontario, Canada, completed a self-administered questionnaire that included items on sociodemographic characteristics, experience with smoking, lifestyle, health and weight, work status, and social involvement as well as parental education, occupation, and family and peer smoking. A series of scales measuring self-esteem, stress, coping, social support, mastery, social conformity, and rebelliousness was incorporated.

RESULTS

Dose-response relationships were evidenced for all categories of variables and were demonstrated for the total group and, in most cases, for males and females when analyzed separately.

CONCLUSIONS

Relationships between variables are not "all or none," but may vary depending on amount or level of other factors. These relationships provide insight into the mechanisms underlying initiation to, maintenance of, and cessation of smoking and should be taken into account in programs to reduce or prevent adolescent tobacco use.

Smoking among male teenagers in Dhaka, Bangladesh

BACKGROUND

Smoking is now recognized as a major public health problem in the developing world. Despite this, there is a dearth of relevant data on smoking prevalence and on the characteristics and attitudes of smokers: in particular, studies are lacking among teenagers and young adults, the group in which the habit frequently begins. The present study addresses this issue by examining the smoking patterns of a sample of teenagers in Dhaka, Bangladesh, during 1991.

METHODS

The study investigated smoking behavior and attitudes among two groups of male teenagers: the first consisted of 555 students, age 12-20 years, selected from two metropolitan high schools; the second, chosen to provide a broad comparison group from a different socioeconomic stratum, contained 112 males of similar age residing in an urban slum. Data were collected largely by interview supplemented by some direct observation and relevant secondary data.

RESULTS

The results showed that 29% of the students and 68% of the slum dwellers said they were regular smokers. In addition, the slum youths smoked substantially more and had smoked for longer than the students. While the study suggests both groups of smokers had been influenced to take up smoking by the smoking behavior of peers and parents, peers were more important for the students. Advertising may also have been a important influence on students since smokers in this group could better identify tobacco advertisements compared with their nonsmoking peers. No significant association was found between respondents' knowledge of the health risks of smoking and their actual smoking behavior.

CONCLUSIONS

This study demonstrates that in Bangladesh, smoking is very common among middle-class male teenagers and even more prevalent among youths from nearby slums. Clearly, local and national programs that draw on relevant knowledge from other countries, but are appropriate to Bangladesh, need to be developed to tackle a major epidemic.

Girls, pecking order and smoking

Against a background of growing concern about the failure to reduce cigarette smoking amongst young people, particularly girls, this paper attempts to unravel the complex interrelationships between smoking, peer group structure and gender. We were particularly intrigued to explore a recent hypothesis in the literature that suggests that girls who smoke, far from lacking self-esteem, are more self-confident and socially skilled than their non-smoking peers. Sociometric and qualitative analyses revealed that smoking behaviour was indeed shaped by gender, and that the psychosocial processes involved in smoking uptake may be different for boys and than for girls. Peer group structure, consistently described by young people as hierarchical, was closely related to smoking behaviour. Girls at the top of the social pecking order who projected an image of high self-esteem were identified as most likely to smoke, while only a small minority of girls fitted the stereotype of the young female smoker who has poor social skills and low self-esteem. Boys of high social status were less vulnerable, since sport and a desire to be fit to some extent protected them. Our findings raise fundamental questions about the meaning of self-esteem in relation to smoking uptake, arguing instead for an exploration of the term "self-worth". They suggest the need for health education programmes which are sensitive both to gender and to peer group structures.