Secondhand smoke exposure in young people and parental rules against smoking at home and in the car

Perceptions of Cannabis Use and Its Benefits and Risks Among Breastfeeding Mothers

Background

Approximately 5% of breastfeeding women report using cannabis. Little is understood about perceived benefits and risks of cannabis use; thus, this study aimed to fill this gap.

Methods

An anonymous online survey was conducted from 2018 to 2019 among breastfeeding women (n = 1516) who used cannabis. Data collected included demographics, frequency and timing of cannabis use, perceived effects in infants, and repercussions experienced. Analyses included descriptive statistics; chi-square and t-tests were used to test differences between groups (SPSSv28). A subset (n = 413) left open-text responses about cannabis and its perceived risks and benefits. Content analysis and ATLAS.ti were used for open-ended responses.

Results

Two-thirds (67%) of participants were "not at all" concerned that cannabis use while breastfeeding affected their baby. Only 3% attributed symptoms in their infants to cannabis use; symptoms were perceived as positive or negative. Interestingly, 45% (n = 603) altered timing of cannabis use relative to breastfeeding to avoid exposing their infant to cannabis. Most mothers (85.8%) reported no changes in their breast milk supply. Few respondents were investigated by Child Protective Services (6.9%) or arrested (3.8%) for cannabis use. In open-ended responses, three themes emerged about the perceptions of cannabis use while breastfeeding: (1) cannabis preferred to address medical concerns, (2) positive impact of cannabis on quality of life for mothers and their children, and (3) concerns about negative consequences.

Conclusion

Breastfeeding mothers who used cannabis reported positive perceptions of cannabis as a safer alternative to medications, yet concerns existed about legal repercussions. Understanding maternal perceptions may be useful in developing successful approaches to counseling mothers about cannabis use.

Global trends in the prevalence of secondhand smoke exposure among adolescents aged 12-16 years from 1999 to 2018: an analysis of repeated cross-sectional surveys

BACKGROUND

Secondhand smoke exposure can cause morbidity and premature mortality. However, the global prevalence of, and trends in, secondhand smoke exposure among adolescents are poorly documented. We aimed to assess the prevalence of, and trends in, secondhand smoke exposure among adolescents from 1999 to 2018.

METHODS

We did an analysis of the most recent data from the Global Youth Tobacco Survey (GYTS), a nationally representative, self-administered, school-based cross-sectional survey of tobacco use and related factors among adolescents aged 12-16 years worldwide. Data from 142 countries and territories that had done a GYTS between 2010 and 2018, comprising 711 366 participants, were used to assess the prevalence of secondhand smoke exposure. Data from 131 countries and territories that had done two or more surveys between 1999 and 2018, comprising 1 405 458 participants, were used to assess trends in secondhand smoke exposure. The frequency of secondhand smoke exposure at home, in public places, or in any place was defined as follows, based on students' responses: 1 or more days, 3 or more days, 5 or more days, or daily during the past 7 days.

FINDINGS

Based on the most recent surveys done in 142 countries between Jan 1, 2010, and Dec 31, 2018, the global prevalence of secondhand smoke exposure in any place was 62·9% (95% CI 61·7-64·1) on 1 or more days, 51·0% (49·8-52·1) on 3 or more days, 40·1% (38·9-41·2) on 5 or more days, and 32·5% (31·5-33·6) daily during the past 7 days. The prevalence of secondhand smoke exposure at home was 33·1% (95% CI 32·1-34·1) on 1 or more days, 20·1% (19·3-20·9) on 3 or more days, 14·9% (14·2-15·7) on 5 or more days, and 12·3% (11·7-13·0) daily during the past 7 days; and in public places the prevalence of secondhand smoke exposure was 57·6% (56·4-58·8) on 1 or more days, 43·4% (42·2-44·6) on 3 or more days, 30·3% (29·2-31·5) on 5 or more days, and 23·5% (22·5-24·5) daily during the past 7 days. Between Jan 1, 1999, and Dec 31, 2018, the prevalence of secondhand smoke exposure (on ≥1 day during the past 7 days) in any place decreased in 57 (43·5%) of 131 countries, increased in 27 (20·6%), and remained unchanged in 47 (35·9%). Although the prevalence of secondhand smoke exposure at home decreased in 86 (65·6%) countries, the prevalence in public places did not change in 46 (35·1%) countries and increased in 40 (30·5%).

INTERPRETATION

Secondhand smoke exposure among adolescents remains a serious public health challenge worldwide. Although the prevalence of secondhand smoke exposure at home decreased in most countries, the prevalence in public places increased or remained unchanged in most countries between 1999 and 2018. These findings emphasise the need to strengthen smoke-free policies, especially in public places.

FUNDING

Youth Team of Humanistic and Social Science of Shandong University, Jinan, China.

TRANSLATION

For the Chinese translation of the abstract see Supplementary Materials section.

Smoke-Free Home Rules and Association with Child Secondhand Smoke Exposure among Mother-Child Dyad Relationships

Smoke-free home rules restrict smoking in the home, but biomarkers of secondhand smoke exposure are needed to help understand the association between smoke-free homes and child secondhand smoke exposure. Participants (n = 346) were majority Black/African American mother-child dyads from a longitudinal study in North Carolina. Mothers completed questionnaires on household smoking behaviors and rules, and child saliva samples were assayed for secondhand smoke exposure. Regression models used smoke-free home rules to predict child risk for secondhand smoke exposure. Children in households with smoke-free home rules had less salivary cotinine and risk for secondhand smoke exposure. After controlling for smokers in the household, home smoking rules were not a significant predictor of secondhand smoke exposure. Compared to children in households with no smokers, children in households with at least one smoker but a non-smoking mother (OR 5.35, 95% CI: 2.22, 13.17) and households with at least one smoker including a smoking mother (OR 13.73, 95% CI: 6.06, 33.28) had greater risk for secondhand smoke exposure. Results suggest smoke-free home rules are not sufficient to fully protect children from secondhand smoke exposure, especially in homes with smokers. Future research should focus on how household members who smoke can facilitate the prevention of child secondhand smoke exposure.

An examination of social and environmental determinants of secondhand smoke exposure among non-smoking adolescents

INTRODUCTION

Adolescents are at increased risk of secondhand smoke exposure (SHS) due to the limited control that they have over social and physical environments. Yet, knowledge regarding determinants of SHS among non-smoking adolescents is limited. This study identifies social and environmental factors associated with SHS among non-smoking adolescents.

METHODS

To be included, parents and adolescents (aged 11–17 years) of the Adolescents, Place, and Behavior Study had to have completed surveys between March 2019 and May 2020. Adolescents had to have not reported smoking within the past 30 days and provided a saliva sample assayed for cotinine (≤3 ng/mL). A series of stepwise linear regression models were fit to the data to identify social and environmental determinants of SHS, using log-transformed salivary cotinine.

RESULTS

Of the 105 adolescent and parent dyads included, 90.3% were African American, 26.9% of parents reported smoking, 33.3% resided in multi-unit housing, and 67.7% lived in homes where smoking was not permitted. Significant associations were found between parent tobacco use (β=2.56, SE=0.98, p=0.0082) and residing in multi-unit housing (β=1.72, SE=0.86, p=0.0460) with increased log-transformed cotinine levels among non-smoking adolescents. Adolescent age, gender, and race/ ethnicity, parental education, peer tobacco use, the number of adults and children in the home, average number of days of self-reported SHS within public spaces outside of the home, and home smoking policies were not significantly associated with cotinine.

CONCLUSIONS

Results emphasize the importance of reducing secondhand smoke exposure by reducing parental smoking and altering exposures within social and home environments. Parental tobacco use and residential setting should be considered when developing interventions to reduce secondhand smoke exposure among non-smoking adolescents.

Subnational exposure to secondhand smoke in Iran from 1990 to 2013: a systematic review

Every year, almost eight million people die from tobacco-related diseases, among which around 1.2 million die from secondhand smoke (SHS) exposure. Generally, it is estimated that SHS constituents generated in the interval between puffs are approximately 3 times more toxic than those produced at the moment of puffing. There is no risk-free level of SHS exposure, and even brief exposure can be harmful to health. The aim of this study was to assess SHS exposure and its trend in the different provinces of Iran from 1990 to 2013. To collect available data on SHS exposure, a systematic review was performed. We searched international and national databases using a combination of Medical Subject Headings (MeSH) and relevant text words in the titles, abstracts, and/or keywords. Also, the data in national surveys were gathered. The frequency of exposure in different provinces as well as age, sex, and rural/urban areas were extracted. Afterwards, modeling was done to estimate SHS exposure from the smoking data. According to our findings, SHS exposure was more prevalent among young people. Moreover, this exposure was greater in rural areas as compared to urban areas. A national study on 13-15-year-old individuals showed the highest exposure occurred outdoors. In addition, a declining trend was observed on SHS exposure over time. It seems that attention to the importance of SHS exposure in researches in Iran dates back to 2001, and gradually, especially in recent years, further studies have been conducted on SHS exposure.

Malaysian adolescents' exposure to secondhand smoke in the car of their parents/guardians: A nationwide cross-sectional school-based study

INTRODUCTION

We investigated the prevalence of children's exposure to secondhand smoke (SHS) in the car of their parents/guardians and the associated factors.

METHODS

A self-administered validated questionnaire was used to obtain data from the nationally representative samples of school-going adolescents aged 11-19 years in Malaysia. Prevalence rates were computed and chi-squared tests and multiple logistic regression were conducted.

RESULTS

Of the participants, 23.3% reported exposure to SHS at least once in the car of their parents/guardians during the last 7 days before the survey. The prevalence and likelihood of SHS exposure were significantly higher in Malays, descendants of natives of Sabah and Sarawak, schools in rural areas, females, and current smokers. However, age group and knowledge on the harmful effects of SHS were not significant after adjusting for confounding effects.

CONCLUSIONS

A substantial proportion of school-going adolescents were exposed to secondhand smoke in the car of their parents/guardians. This highlights the need for effective tobacco control measures to include health promotion and smoke-free car regulations to be introduced to prevent severe health hazards and to reduce smoking initiation among non-smoking adolescents.

Prevalence and characteristics of secondhand smoke and secondhand vapour exposure among youth

BACKGROUND

It is well established that secondhand smoke (SHS) is harmful, and concern about the potential dangers associated with secondhand vapour (SHV) (ie, vapour from electronic vapour products, EVP) is growing. The present study examines the prevalence and characteristics associated with SHS and SHV exposure.

METHODS

Data from youth aged 11-17 who completed the 2016 Florida Youth Tobacco Survey (n=58 616) were analysed. Demographics, past 30 day SHS and SHV exposure, environmental factors, cigarette and EVP use status, SHS and SHV harm perceptions, and tobacco susceptibility were assessed. Weighted multivariable logistic regressions were performed to examine characteristics associated with SHS and SHV exposure, and SHS and SHV exposure with tobacco susceptibility.

RESULTS

Overall, 42% of Florida youth reported SHS exposure and 29% reported SHV exposure during the past 30 days. Living in a home where tobacco use was permitted (vs not permitted) was positively associated with SHS (adjusted OR (AOR) 2.57) and SHV exposure (AOR 1.56). Perceived SHS as harmful (vs not harmful) was positively associated with SHS (AOR 1.73) and SHV exposure (AOR 1.97), while perceived SHV as harmful was negatively associated with SHS (AOR 0.86) and SHV exposure (AOR 0.56). SHS and SHV exposure was significantly associated with susceptibility to cigarette and EVP use (AOR 1.40 and 2.08, respectively).

CONCLUSIONS

Almost one-third of Florida youth reported SHV exposure. Factors associated with SHS and SHV exposure are somewhat similar, and exposure to SHS and SHV is associated with tobacco susceptibility in youth. Promoting tobacco-free homes is needed to protect youth from SHS and SHV exposure.

Household Implementation of Smoke-Free Rules in Homes and Cars: A Focus on Adolescent Smoking Behavior and Secondhand Smoke Exposure

PURPOSE

This study addresses the dearth of population-based research on how comprehensive household smoke-free rules (ie, in the home and car) relate to tobacco use and secondhand smoke (SHS) exposure among adolescents.

DESIGN

Analysis of 2014 Minnesota Youth Tobacco Survey.

SETTING

Representative sample of Minnesota youth.

PARTICIPANTS

A total of 1287 youth who lived with a smoker.

MEASURES

Measures included household smoke-free rules (no rules, partial rules-home or car, but not both-and comprehensive rules), lifetime and 30-day cigarette use, 30-day cigarette and other product use, and SHS exposure in past 7 days in home and car.

ANALYSIS

Weighted multivariate logistic, zero-inflated Poisson, and zero-inflated negative binomial regressions were used.

RESULTS

Compared to comprehensive rules, partial and no smoke-free rules were significantly and positively related to lifetime cigarette use (respectively, adjusted odds ratio [AOR] = 1.80, 95% confidence interval [CI] = 1.24-2.61; AOR = 2.87, 95% CI = 1.93-4.25), and a similar significant pattern was found for 30-day cigarette use (respectively, AOR = 2.20, 95% CI = 1.21-4.02; AOR = 2.45, 95% CI = 1.34-4.50). No smoke-free rules significantly predicted using cigarettes and other tobacco products compared to comprehensive rules. In both descriptive and regression analyses, we found SHS exposure rates in both the home and car were significantly lower among youth whose household implemented comprehensive smoke-free rules.

CONCLUSIONS

Comprehensive smoke-free rules protect youth from the harms of caregiver tobacco use. Relative to both partial and no smoke-free rules, comprehensive smoke-free rules have a marked impact on tobacco use and SHS exposure among youth who live with a smoker. Health promotion efforts should promote comprehensive smoke-free rules among all households and particularly households with children and adolescents.

Survey Mode and Rates of Smoke-free Homes and Support for Smoking Bans Among Single Parents in the United States in 2010-2011 and 2014-2015

National surveys are commonly used to monitor the rates of smoke-free homes and public attitudes toward smoking bans. The study explored the difference in the estimates corresponding to two survey modes-personal interviews and phone interviews-among single-parent households. Data from the Tobacco Use Supplement to the Current Population Survey administered in 2010-11 and 2014-15 were used in a stratified fashion. The rate of smoke-free homes was lower for personal interviews (79% in 2010-11 and 82% in 2014-15) than for phone interviews (85% in 2010-11 and 90% in 2014-15). Even after controlling for several factors, personal interviews corresponded to lower odds of having a smoke-free home relative to phone interviews (OR=0.7, CI=0.6:0.9 in 2010-11; OR=0.5, CI = 0.4:0.6 in 2014-15). The survey mode should be included in the analyses when estimating the rates of smoke-free homes and other smoking-related attitudes, because different survey modes could be associated with different response bias.

Prevalence and factors associated with exposure to secondhand smoke (SHS) among young people: a cross-sectional study from the Gambia

BACKGROUND

Annually, 600 000 deaths are attributed to exposure of non-smokers to secondhand smoke (SHS). These include 165 000 among children, about 60% of which occur in Africa and Southeast Asia. As of 2017, only seven countries in the African region had comprehensive smoke-free legislation covering all public places. Given the increasing prevalence of smoking in many low-income countries, preventing exposure to SHS is an urgent public health priority, particularly in Sub-Saharan Africa.

OBJECTIVES

The objective of this study is to obtain a reliable and nationally representative estimate of the prevalence of exposure to SHS and to identify the major risk factors among young people in The Gambia.

SETTINGS AND METHODS

We used a two-stage cluster random sampling to select students in secondary schools throughout The Gambia and a self-administered questionnaire to collect data on demographic characteristics and detailed indicators of exposure to SHS.

RESULTS

Of the 10 392 eligible students, 10 289 (99%; 55% girls and 44% boys, age 12-20 years) participated. The proportion of students reporting any exposure to SHS was 97.0% (enclosed public places 59.2%, outdoor public places 61.4%, school 21.3% and home 38.2%), with 96.4% reporting some exposure outside the home. Exposure to SHS in the home was more common in girls and among older students. Parental education, living with parents and being sent to purchase cigarettes were associated with exposure to SHS both within and outside the home. More than 50% of students supported public smoking ban in both enclosed and outdoor public places. About 35% of students were unaware of the harmful effects of exposure to SHS.

CONCLUSIONS

Exposure to SHS is highly prevalent among students in The Gambia and occurs mostly outside of the home. Interventions to reduce SHS exposure in students are urgently needed.

Correlates of Allowing Alternative Tobacco Product or Marijuana Use in the Homes of Young Adults

BACKGROUND

Given the increases in alternative tobacco product (ATP) and marijuana use, we examined self-reported likelihood of allowing ATP and marijuana use in the home among young adults.

METHODS

We analyzed data from a study of students aged 18 to 25 years (n = 2865) at 7 Georgia colleges and universities. Variables included: personal, household members', and friends' tobacco (cigarettes, little cigars and cigarillos [LCCs], e-cigarettes, hookah) and marijuana use and the perceived harm to health, harm of byproducts, addictiveness, and social acceptability of each. Regression models were specified to examine correlates of the likelihood of allowing use of each product in the home.

RESULTS

Personal use prevalence ranged from 5.5% for e-cigarettes to 12.5% for marijuana. E-cigarettes were most likely to be allowed in the home; cigarettes were least. Regression indicated that others' use and the perceived social acceptability of using each product was correlated with greater likelihood of allowing the use of a product. A greater likelihood of allowing cigarette and LCC use in the home was only associated with cigarette or LCC use, respectively; a greater likelihood of allowing e-cigarette use was associated with current e-cigarette use; greater likelihood of allowing hookah use was associated with using any product except e-cigarettes; and greater likelihood of allowing marijuana use was associated with LCC and marijuana use. Perceived harm to health, byproduct harms, and addictiveness were differentially related to the likelihood of allowing use of different products.

CONCLUSIONS

ATPs and marijuana may undermine efforts to protect against environmental toxins in the home, thus warranting interventions targeting young adults.

Cardiovascular Consequences of Childhood Secondhand Tobacco Smoke Exposure: Prevailing Evidence, Burden, and Racial and Socioeconomic Disparities: A Scientific Statement From the American Heart Association

BACKGROUND

Although public health programs have led to a substantial decrease in the prevalence of tobacco smoking, the adverse health effects of tobacco smoke exposure are by no means a thing of the past. In the United States, 4 of 10 school-aged children and 1 of 3 adolescents are involuntarily exposed to secondhand tobacco smoke (SHS), with children of minority ethnic backgrounds and those living in low-socioeconomic-status households being disproportionately affected (68% and 43%, respectively). Children are particularly vulnerable, with little control over home and social environment, and lack the understanding, agency, and ability to avoid SHS exposure on their own volition; they also have physiological or behavioral characteristics that render them especially susceptible to effects of SHS. Side-stream smoke (the smoke emanating from the burning end of the cigarette), a major component of SHS, contains a higher concentration of some toxins than mainstream smoke (inhaled by the smoker directly), making SHS potentially as dangerous as or even more dangerous than direct smoking. Compelling animal and human evidence shows that SHS exposure during childhood is detrimental to arterial function and structure, resulting in premature atherosclerosis and its cardiovascular consequences. Childhood SHS exposure is also related to impaired cardiac autonomic function and changes in heart rate variability. In addition, childhood SHS exposure is associated with clustering of cardiometabolic risk factors such as obesity, dyslipidemia, and insulin resistance. Individualized interventions to reduce childhood exposure to SHS are shown to be at least modestly effective, as are broader-based policy initiatives such as community smoking bans and increased taxation.

PURPOSE

The purpose of this statement is to summarize the available evidence on the cardiovascular health consequences of childhood SHS exposure; this will support ongoing efforts to further reduce and eliminate SHS exposure in this vulnerable population. This statement reviews relevant data from epidemiological studies, laboratory-based experiments, and controlled behavioral trials concerning SHS and cardiovascular disease risk in children. Information on the effects of SHS exposure on the cardiovascular system in animal and pediatric studies, including vascular disruption and platelet activation, oxidation and inflammation, endothelial dysfunction, increased vascular stiffness, changes in vascular structure, and autonomic dysfunction, is examined.

CONCLUSIONS

The epidemiological, observational, and experimental evidence accumulated to date demonstrates the detrimental cardiovascular consequences of SHS exposure in children.

IMPLICATIONS

Increased awareness of the adverse, lifetime cardiovascular consequences of childhood SHS may facilitate the development of innovative individual, family-centered, and community health interventions to reduce and ideally eliminate SHS exposure in the vulnerable pediatric population. This evidence calls for a robust public health policy that embraces zero tolerance of childhood SHS exposure.

Hospital doctors' smoking behavior and attitude towards smoking cessation interventions for patients: a survey in an Italian Comprehensive Cancer Centre

PURPOSE

Tobacco control guidelines recommend all healthcare professionals to ask patients about their smoking status and to offer them at least minimal cessation advice. However, few data are available about the daily practice of hospital clinicians who work with smoking cancer patients. This study assesses, in a comprehensive cancer center, the physicians' smoking habit, their clinical practice in offering a smoking cessation intervention to patients who smoke, and the training they received in this field.

METHODS

A Web-based survey was sent to 285 physicians.

RESULTS

The survey response rate was 75%. Sixty-two percent, 24%, and 14% of responders were never, former, and current smokers, respectively. Six percent of all responding physicians have already participated in smoking cessation training and 43% of them declared their willingness to be trained. Eighty-six percent of all responding physicians asked about the patients' smoking status, 50% routinely advised patients to quit smoking, and 32% assessed their motivation to do so. Smoking cessation guidelines were not followed mostly for lack of time, fear to increase patients' stress, and lack of smoking cessation training. Ninety-four percent of responding physicians knew the smoking cessation service for outpatients and 65% referred at least one patient, 66% of responding physicians knew the service for inpatients, and 36% of them asked for at least one intervention in the ward.

CONCLUSIONS

This study pointed out partial adherence of the physicians working in a leading cancer center to the smoking cessation guidelines. The clinicians' smoking habits did not influence the training and the clinical practice in offering patients smoking cessation interventions.

Reactions to smoke-free public policies and smoke-free home policies in the Republic of Georgia: results from a 2014 national survey

OBJECTIVES

We examined receptivity to public smoke-free policies and smoke-free home status among adults in the Republic of Georgia.

METHODS

In Spring 2014, we conducted a national household survey of 1163 adults.

RESULTS

Our sample was on average 42.4 years old, 51.1 % male, and 43.2 % urban. Current smoking prevalence was 54.2 % in men and 6.5 % in women. Notably, 42.2 % reported daily secondhand smoke exposure (SHSe). Past week SHSe was 29.9 % in indoor public places and 33.0 % in outdoor public places. The majority reported no opposition to public smoke-free policies. Correlates of greater receptivity to public policies included being older, female, and a nonsmoker. Past week SHSe in homes was 54.2 %; 38.8 % reported daily SHSe at home. Only 14.3 % reported complete smoke-free home policies; 39.0 % had partial policies. The only correlate of allowing smoking in the home was being a smoker. Among smokers, correlates of allowing smoking in the home were being male and lower confidence in quitting.

CONCLUSIONS

SHSe is prevalent in various settings in Georgia, requiring efforts to promote support for public smoke-free policies and implementation of personal policies.

Smoke-Free Public Policies and Voluntary Policies in Personal Settings in Tbilisi, Georgia: A Qualitative Study

Georgia has limited tobacco control policies, particularly in the area of smoke-free public policies, which may influence the adoption of smoke-free home rules. We qualitatively examined knowledge about and reactions to public and personal smoke-free policies among Tbilisi residents. In Spring 2014, we conducted six focus groups among 47 total participants—two among male smokers, one among male nonsmokers, two among female smokers, and one among female nonsmokers. Our sample was 48.9% male and 70.2% past 30-day smokers. Most believed that SHS was dangerous, with particular concern regarding the impact of SHS on children and pregnant women. Many had misconceptions about how to protect others from SHS and the effectiveness of some approaches. Many indicated that they had some type of home rules, but few reported a complete ban on smoking in the home. Even when some restrictions were in place, they rarely were effective or enforced. Common concerns about the partial smoke-free public policy in Georgia included its economic impact, perceived discrimination among smokers, and the policy being against the Georgian culture. These concerns were heightened when participants were asked about the possible implementation of a complete smoke-free policy. Educational programs are needed to promote smoke-free policies in Georgia.

National and state prevalence of smoke-free rules in homes with and without children and smokers: Two decades of progress

OBJECTIVE

The home is the primary source of secondhand smoke (SHS) exposure for children. We assessed national and state progress in smoke-free home (SFH) rule adoption in homes with and without children and adult smokers.

METHODS

Data came from the 1992-1993 and 2010-2011 Tobacco Use Supplements to the Current Population Survey, a U.S. national probability household survey. Households were defined as having a SFH rule if all household respondents aged ≥18 indicated no one was allowed to smoke inside the home at any time. Households with children were those with occupants aged <18. Smokers were those who smoked ≥100 lifetime cigarettes and now smoked "everyday" or "some days".

RESULTS

From 1992-1993 to 2010-2011, SFH rule prevalence increased from 43.0% to 83.0% (p<.05). Among households with children, SFH rules increased overall (44.9% to 88.6%), in households without smokers (59.7% to 95.0%), and households with ≥1 smokers (9.7% to 61.0%) (p<.05). Among households without children, SFH rules increased overall (40.8% to 81.1%), in households without smokers (53.4% to 90.1%), and households with ≥1 smokers (6.3% to 40.9%) (p<.05). Prevalence increased in all states, irrespective of smoker or child occupancy (p<.05). In 2010-2011, among homes with smokers and children, SFH rule prevalence ranged from 36.5% (West Virginia) to 86.8% (California).

CONCLUSIONS

Considerable progress has been made adopting SFH rules, but many U.S. children continue to be exposed to SHS because their homes are not smoke-free. Further efforts to promote adoption of SFH rules are essential to protect all children from this health risk.

Reduction of Secondhand Smoke Exposure in the Cars of Children With Cancer

This study examined whether an intervention designed to reduce secondhand smoke exposure (SHSe) among children being treated for cancer had effects in the specific setting of a motor vehicle. The parents or guardians (n = 71) of children being treated for cancer were randomized to either a behavioral secondhand smoke (SHS) reduction program or a standard care control group. Parental reports of SHSe were collected over the course of 12 months. Younger children were exposed at baseline more than their older counterparts. The greatest initial declines in car exposure were observed among children ≤5 years old in the intervention group compared with same-aged peers in the control group. After the 3-month time point, the control group showed greater reductions in car exposure in comparison with the intervention group. Interventions that teach parents strategies to manage their smoking while driving in their personal vehicles may produce even greater reductions in child exposure and should be developed. Based on the age-specific results reported here, future studies should account for effects of child age and use setting-specific measures of SHS.

The relationship between secondhand smoke exposure, pro-tobacco social influences, and smoking susceptibility among nonsmoking Zambian adolescents

BACKGROUND

We tested the hypothesis that the extent of secondhand smoke (SHS) exposure among nonsmoking adolescents would be associated with their overall exposure to pro-tobacco social influences.

METHODS

Data were analyzed using descriptive and multivariate methods from the 2011 Zambia Global Youth Tobacco Survey.

RESULTS

The odds of SHS exposure increased with increasing exposure to pro-tobacco advertisements. About 39.5% of the gap in SHS exposure between nonsmokers with low versus high smoking susceptibility was attributable to differences in parental or peer smoking.

CONCLUSIONS

Sustained efforts are needed to denormalize tobacco use in order to reduce youth susceptibility to tobacco use.

Allowing cigarette or marijuana smoking in the home and car: prevalence and correlates in a young adult sample

Given the increased marijuana use, negative health consequences of marijuana secondhand smoke exposure (SHSe) and dearth of research regarding marijuana SHSe in personal settings, we examined the prevalence and correlates of allowing marijuana versus cigarette smoking in personal settings among 2002 online survey respondents at two southeastern US universities in 2013. Findings indicated that 14.5% allowed cigarettes in the home, 17.0% marijuana in the home, 35.9% cigarettes in cars and 27.3% marijuana in cars. Allowing cigarettes in the home was associated with younger age, racial/ethnic minority status, living off campus, personal marijuana use, parental tobacco use and positive perceptions of cigarettes (P < 0.05). Correlates of allowing marijuana in the home included older age, not having children, living off campus, positive perceptions of marijuana and personal, parental and friend marijuana use (P < 0.05). Correlates of allowing cigarettes in cars included personal cigarette and marijuana use, parental tobacco and marijuana use, more cigarette-smoking friends and positive perceptions of cigarettes (P < 0.05). Correlates of allowing marijuana in cars included being non-Hispanic black; positive perceptions of marijuana; and personal, parental and friend marijuana use (P < 0.05). Interventions must target distinct factors influencing policies regarding cigarette versus marijuana use in personal settings to address the consequences of marijuana and cigarette SHSe.

Assessment of secondhand smoke exposure at school among U.S. Middle and high school students

To obtain nationally representative estimates of the prevalence of secondhand smoke (SHS) exposure at U.S. schools, we assessed the prevalence and correlates of SHS exposure at school among U.S. middle and high school students using data from the 2011 National Youth Tobacco Survey comprising of 18,866 students spread across all the U.S. states. Overall prevalence of SHS exposure at school was 25.7% (95% CI: [23.6%, 27.8%]). Multivariate logistic regression indicated that having ≥1 smoker friends (adjusted Odds Ratio [aOR] = 2.92; p < .001); being a smoker (aOR = 2.75; p < .001); and being aged 13-16 years, or ≥17 years (vs. 9-12 years) significantly increased the likelihood of SHS exposure. Understanding the health risks of SHS exposure alone did not seem to play a significant role in reducing exposure (aOR = .89; p = .342). These findings show there are significant levels of SHS exposure among students at U.S. middle and high schools, and sustained multipronged efforts are needed to reduce youth SHS exposure.

Factors influencing adoption of and adherence to indoor smoking bans among health disparity communities

OBJECTIVES

We assessed current home smoking behaviors and secondhand smoke (SHS) levels among parents of children in low-income, racial/ethnic minority communities in Massachusetts.

METHODS

We used a cross-sectional design to assess home smoking rules, smoking status, cigarettes smoked in the home, and barriers and benefits to attaining a smoke-free home among 138 caregivers (mean age=30.0 years; 92% women) of children aged 0 to 6 years, between April 2010 and September 2012. Indoor SHS was assessed using a nicotine dosimeter.

RESULTS

Households with no ban reported a higher weekly mean number of cigarettes smoked in the home (114 cigarettes/week) than homes with partial (71 cigarettes/week) or complete (30 cigarettes/week) bans (P<.01). Smoking occurred outside more than inside homes with partial or complete bans. Air nicotine levels were positively associated with no household smoking ban, current smoking by the caregiver, and smoking indoors.

CONCLUSIONS

Strategies to reduce home SHS should focus on a "complete" home smoking ban and smoking cessation. SHS mitigation strategies such as smoking outside were associated with lower SHS among participants unable to maintain a complete ban, and might enhance the likelihood of longer term success while immediately reducing home SHS.

Disparities and trends in indoor exposure to secondhand smoke among U.S. adolescents: 2000-2009

INTRODUCTION

Secondhand smoke (SHS) exposure causes disease and death among nonsmokers. With a plethora of smoke-free legislation implemented and a steady decrease in cigarette consumption noted over the past decade in the U.S., this study assessed trends in indoor SHS exposure among U.S. adolescents in grades 6-12 during 2000-2009.

METHODS

Data were obtained from the 2000-2009 National Youth Tobacco Survey - a national survey of U.S. middle and high school students. SHS exposure within an indoor area within the past seven days was self-reported. Trends in indoor SHS exposure during 2000-2009 were assessed overall and by socio-demographic characteristics, using the Wald's test in a binary logistic regression. Within-group comparisons were performed using chi-squared statistics (p<0.05).

RESULTS

The proportion of U.S. middle and high school students who were exposed to indoor SHS declined from 65.5% in 2000 to 40.5% in 2009 (p<0.05 for linear trend). Significant declines were also observed across all population subgroups. Between 2000 and 2009, prevalence of indoor SHS exposure declined significantly among both middle (58.5% to 34.3%) and high school (71.5% to 45.4%) students. Prevalence of indoor SHS exposure was significantly higher among girls (44.0% in 2009) compared to boys (37.2% in 2009) during each survey year. Similarly, prevalence of indoor SHS exposure during 2000-2009 was highest among non-Hispanic whites (44.2% in 2009) and lowest among non-Hispanic Asians (30.2% in 2009). During each survey year, prevalence was highest among the oldest age group (≥18 years) and lowest among the youngest (9-11 years). Also, prevalence was significantly higher among current cigarette smokers (83.8% in 2009) compared to nonsmokers (34.0% in 2009).

CONCLUSION

Significant declines in indoor SHS exposure among U.S. middle and high school students occurred during 2000-2009. While the results are encouraging, additional efforts are needed to further reduce youth indoor SHS exposure.

Impact of a multi-level intervention to prevent secondhand smoke exposure in schoolchildren: a randomized cluster community trial

OBJECTIVE

To assess the effectiveness of a multi-level (individual, family, and school) school-based intervention to prevent the exposure to secondhand smoke (SHS) in a population of schoolchildren (12-14 years old).

METHOD

This was a community trial with cluster randomization of schools to an intervention and comparison group (ClinicalTrials.Gov identifier NCT01881607). The intervention targeted schoolchildren in Terrassa (Catalonia, Spain). We assessed SHS exposure in different settings and tobacco consumption by means of a questionnaire before and one year after the intervention.

RESULTS

We analyzed data from 1734 students with both baseline and follow-up data. The crude analysis showed that SHS exposure among students in the intervention group significantly decreased at school (-14.0%), at home (-19.9%), and on transportation (-21.8%). In the comparison group, SHS exposure significantly decreased only at home (-16.9%). After adjustment for potential confounders, the good accomplishment of the activities showed a possible trend towards a non-significant reduction in exposure at home, transportation, and leisure time.

CONCLUSION

While this school-based multi-level intervention had no overall effect in SHS exposure, the improvement of the activities focused on preventing SHS would be needed in order to achieve a significant decrease in the proportion of children exposed to SHS.

Smoke-free rules and secondhand smoke exposure in homes and vehicles among US adults, 2009-2010

INTRODUCTION

An increasing number of US states and localities have implemented comprehensive policies prohibiting tobacco smoking in all indoor areas of public places and worksites. However, private settings such as homes and vehicles remain a major source of exposure to secondhand smoke (SHS) for many people. This study assessed the prevalence and correlates of voluntary smoke-free rules and SHS exposure in homes and vehicles among US adults.

METHODS

We obtained data from the 2009-2010 National Adult Tobacco Survey, a landline and cellular-telephone survey of adults aged 18 years or older residing in the 50 US states or the District of Columbia. We calculated national and state estimates of smoke-free rules and past-7-day SHS exposure in homes and vehicles and examined national estimates by sex, age, race/ethnicity, and education.

RESULTS

The national prevalence of voluntary smoke-free home rules was 81.1% (state range, 67.9%-92.9%), and the prevalence of household smoke-free vehicle rules was 73.6% (state range, 58.6%-85.8%). Among nonsmokers, the prevalence of SHS exposure was 6.0% in homes (state range, 2.4%-13.0%) and 9.2% in vehicles (state range, 4.8%-13.7%). SHS exposure among nonsmokers was greatest among men, younger adults, non-Hispanic blacks, and those with a lower level of education.

CONCLUSION

Most US adults report having voluntary smoke-free home and vehicle rules; however, millions of people remain exposed to SHS in these environments. Disparities in exposure also exist among certain states and subpopulations. Efforts are needed to warn about the dangers of SHS and to promote voluntary smoke-free home and vehicle rules.

The role of home smoking bans in limiting exposure to secondhand tobacco smoke in Hungary

Our objective was to assess how exposure to secondhand tobacco smoke occurs in Hungarian homes, particularly among non-smokers, and to examine the effectiveness of home smoking bans in eliminating exposure to secondhand smoke at home. In 2009, 2286 non-smokers and smokers aged 16-70 years, who were selected randomly from a nationally representative sample of 48 Hungarian settlements, completed paper-and-pencil self-administered questionnaires addressing tobacco-related attitudes, opinions and behaviors. Chi-square tests, one-way analysis of variance and multivariate logistic regression models were used to assess the effect of demographics, socio-economic characteristics and home smoking policies on the risk of exposure to secondhand tobacco smoke at home. Significantly higher risk of exposure was found among younger, lower educated and poorer people and among those having no or partial home smoking restrictions. There was a significant interaction between education level and home smoking policies: the effect of a smoking ban on exposure to secondhand tobacco smoke was stronger for the lower educated group than the higher educated group. The results suggest that Hungarians are making good progress in implementing home smoking bans, and that in the majority of population these bans are working. More can be done to promote the uptake of home smoking bans among poorer and less educated subpopulations.

Secondhand smoke exposure in cars among middle and high school students--United States, 2000-2009

OBJECTIVES

Exposure to secondhand smoke (SHS) from cigarettes poses a significant health risk to nonsmokers. Among youth, the home is the primary source of SHS. However, little is known about youth exposure to SHS in other nonpublic areas, particularly motor vehicles.

METHODS

Data were obtained from the 2000, 2002, 2004, 2006, and 2009 waves of the National Youth Tobacco Survey, a nationally representative survey of US students in grades 6 to 12. Trends in SHS exposure in a car were assessed across survey years by school level, gender, and race/ethnicity by using binary logistic regression.

RESULTS

From 2000 to 2009, the prevalence of SHS exposure in cars declined significantly among both nonsmokers (39.0%-22.8%; trend P < .001) and smokers (82.3%-75.3%; trend P < .001). Among nonsmokers, this decline occurred across all school level, gender, and race/ethnicity subgroups.

CONCLUSIONS

SHS exposure in cars decreased significantly among US middle and high school students from 2000 to 2009. Nevertheless, in 2009, over one-fifth of nonsmoking students were exposed to SHS in cars. Jurisdictions should expand comprehensive smoke-free policies that prohibit smoking in worksites and public places to also prohibit smoking in motor vehicles occupied by youth.