Factors associated with the onset of smoking and alcohol consumption: A cross-sectional study among Lebanese adolescents in schools

OBJECTIVES

This study aimed to evaluate factors and profiles associated with the earlier onset of cigarette/waterpipe smoking and alcohol consumption among Lebanese adolescents in schools.

METHODS

A total of 4000 adolescents (mean age = 15.31 ± 2.01 years) participated in this cross-sectional study. The standardized questionnaire was taken from the Health Behavior in School Children (HBSC) study in different countries (France, Belgium, and the USA) and adjusted to the Lebanese population. K-means clustering analysis was conducted to classify participants into three clusters according to their patterns (surrounded by smokers, surrounded by drinkers, and ease of talking to family members and friends) and Cox regression analyzes were conducted.

RESULTS

Participants were divided into three clusters. Cluster 1 (16.75% of participants) included adolescents with the lowest ease of talking to a family member or friend, with the latter smoking and drinking a lot (worst cluster). Cluster 2 (54.95%) included adolescents with moderate ease of talking to a family member and more to friends, surrounded by low-to-moderate smoking and alcohol consumption, particularly for a best friend (positive influence cluster). Finally, cluster 3 (28.30%) included adolescents with low ease of talking to friends, moderate ease of talking to a family member, and low-to-moderate smoking and alcohol consumption (low influence cluster). The results of the Cox regressions (taking the age at onset of smoking cigarettes and waterpipes as the dependent variables) showed that older age at onset of cigarette and waterpipe smoking was significantly associated with female participants and those belonging to clusters 2 and 3 compared to cluster 1. Moreover, a younger age at first alcohol use and getting drunk was significantly associated with living outside Beirut, whereas female gender and belonging to clusters 2 or 3 compared to cluster 1 were significantly associated with older age at first alcohol use and getting drunk.

CONCLUSION

This study identified risk factors (ease of talking as well as smoking and alcohol-drinking status of parents, siblings, and friends) and profiles related to early alcohol and cigarette/waterpipe use. These risk factors and profiles could help implement prevention campaigns to reduce substance use and improve adolescent health.

Factors Affecting Waterpipe Tobacco Smoking among University Students in Qatar

Background: Recent data show an increase in the prevalence of waterpipe tobacco smoking (WTS) among university students in the Arab Gulf region alongside an attitude of social acceptability and a perception that WTS is less harmful than traditional cigarette smoking. Objective: This study measures the prevalence of WTS among university students and examines the individual, sociocultural, and environmental factors influencing this practice. Methods: Participants were selected through stratified random sampling of students in the largest national university in Qatar. Data were collected anonymously using an online questionnaire. Descriptive univariate and bivariate analyses were conducted to examine the association of WTS with participants' sociodemographic characteristics, knowledge, and attitudes. Results: 199 students completed the questionnaire. Among students who reported using tobacco products, waterpipe (shisha) was the most common product (70.6%). WTS was significantly associated with having a mother (p = 0.015) or a close friend (p < 0.001) who smoked. Compared to non-users, waterpipe tobacco users were significantly more likely to believe that waterpipe tobacco is less addictive than cigarettes (p = 0.009) and significantly less likely to believe that waterpipe tobacco can lead to cardiovascular diseases (p = 0.003) or dental problems (p = 0.02). More waterpipe tobacco users than non-users disagreed that parents (p = 0.005) or advertisements (p = 0.002) could influence use. More waterpipe tobacco users (70%) than non-users (37%) believed that females were more comfortable using waterpipes than cigarettes. Conclusions and implications: The findings shed light on factors shaping WTS and provide evidence for designing multilevel behavioral interventions to decrease the prevalence of WTS among youth.

Levels of Chemical Toxicants in Waterpipe Tobacco and Waterpipe Charcoal Solid Waste

This work provides insights on waterpipe tobacco and waterpipe charcoal as potential sources of environmental toxicants. Selected harmful and potentially harmful constituents (HPHCs) from ten U.S. commercial waterpipe tobacco filler products (before and after electric heating) and five waterpipe charcoal products (before and after burning) were investigated. The differences in quantities of HPHCs between the evaluated products appear to be affected by raw material properties and/or the manufacturing processes involved in product production. Trace metal quantities in waterpipe tobacco and charcoal products were observed after heating or burning conditions compared to unheated or unburned conditions, which could impact the environment through the generation of toxic tobacco product waste. This study demonstrates that waterpipe tobacco and waterpipe charcoal contain substantial quantities of benzo[a]pyrene (B[a]P) and trace metals (i.e., selenium, arsenic, cadmium, chromium, cobalt, lead, nickel) before use and that extensive and varied changes in trace metal quantities take place as a result of heating, and more studies are needed to estimate the magnitude of the environmental impact of waterpipe tobacco use.

Withdrawal Symptoms among Cigarette and Waterpipe Smokers: A Study in Natural Setting

Background:

The rates of tobacco use, including cigarette and waterpipe smoking, are surging in the Eastern Mediterranean region. The use of these products causes nicotine dependence that makes even short-term tobacco abstinence difficult due to aversive symptoms. During the daytime fasting of the month of “Ramadan”, people accept significant disruption in regular activities, including tobacco smoking. Thus, daytime during Ramadan (before sunset) is likely associated with abstinence symptoms emerging among tobacco smokers. We assessed this hypothesis by measuring tobacco/nicotine abstinence symptoms and craving among smokers of cigarettes or waterpipes during Ramadan.

Methods:

A cross-sectional survey-based study was conducted on a convenience sample of adults. Participants were assessed for general information about tobacco smoking, dependence, and nicotine desire or craving, and withdrawal symptoms using the Minnesota Nicotine Withdrawal Scale (MNWS) and the Tiffany-Drobes Questionnaire on Smoking Urges.

Results:

The study sample included 632 exclusive cigarette smokers and 161 exclusive waterpipe tobacco smokers. After fasting and abstaining from tobacco during the day, approximately 75% of cigarette smokers and 20% of waterpipe smokers reported smoking within the first 30 minutes. In addition, 10% of cigarette smokers and 30% of waterpipe smokers reported smoking within the first 60 minutes. Regarding smoking urge, no significant difference was found between cigarette and waterpipe smokers. For nicotine craving and withdrawal, significant differences between cigarette and waterpipe smokers were found when comparing mean scores for each of the following items: (i) urge to smoke, (ii) craving nicotine, (iii) hunger, (iv) desire for sweets, and (v) depression/feeling blue (P-values < 0.05).

Conclusion:

This study provided evidence from the month of Ramadan that waterpipe smoking is associated with abstinence-induced smoking urge and withdrawal symptoms that are comparable to cigarette smoking. More interdisciplinary research must be focused on developing interventions to reduce tobacco smoking, including waterpipe.

Characteristics of flavored and non-flavored waterpipe tobacco users: a real-world setting study

We aimed to compare sociodemographic characteristics, smoking patterns, beliefs and perceptions, nicotine dependence, and psychological indicators between flavored waterpipe (WP) tobacco (FWT) and non-flavored WP tobacco (non-FWT) smokers in Iran. A cross-sectional study was conducted in 94 WP-serving venues surrounding Tehran and Ardabil metropolitans in Iran. Convenience sampling was applied to select 900 current WP smokers [508 (56%) FWT-only and 392 (44%) non-FWT-only smokers] aged 18 years and older. Multivariable logistic regression was used to examine the independent characteristics of FWT and non-FWT smokers. Compared to non-FWT smokers, FWT smokers were younger (adjusted odds ratio [AOR]=0.88, 95% confidence interval [CI]: 0.87-0.90) and more likely to have ≥ 1 sibling who smoked WP (AOR=1.54, 95% CI: 1.06-2.24), share WP with others (AOR=2.52, 95% CI: 1.68-3.77), report current cigarette smoking (AOR=2.05, 95% CI: 1.23-3.42), and report confidence in quitting at any time (AOR=3.64, 95% CI: 2.45-5.39). FWT smokers were less likely to have seen (AOR=0.40, 95% CI: 0.27-0.60) or read (AOR=0.44, 95% CI: 0.24-0.80) warning messages on WP tobacco packages relative to non-FTW smokers. The most common self-reported reason for smoking WP was entertainment for both groups, followed by stress relief for non-FWT smokers and the escape from loneliness for FWT smokers. FWT-only smokers differ from non-FWT-only smokers in several aspects including being younger, having more positive beliefs and perceptions regarding WP use, and having higher cigarette smoking prevalence. These findings will help in developing more effective and targeted policies and cessation interventions for WP smokers according to flavor type they use, especially in the Middle East.

Lebanese Waterpipe Dependence Scale (LWDS-11) validation in a sample of Lebanese adolescents

Background

Salameh et al. developed the Lebanese Waterpipe Dependence Scale (LWDS-11) that assesses nicotine dependence among adult waterpipe smokers. In view of the high waterpipe use among Lebanese youth and other neighboring countries, it was deemed necessary to check the psychometric properties of the LWDS-11, originally adapted to the Lebanese population, to measure nicotine dependence among adolescents.

Methods

Two cross-sectional investigations were conducted; Study 1 (January and May 2019) enrolled a total of 449 students who were exclusive waterpipe smokers; this sample was used to conduct the exploratory factor analysis. Study 2 enrolled another sample composed of 243 waterpipe smoking adolescents. This sample was independent from the first one and was used to conduct the confirmatory analysis.

Results

The results also showed that 312 (69.5%) [95% CI 0.652–0.738] had high waterpipe dependence (scores of ≥10). Results of the factor analysis in sample 1 showed that all LWDS-11 items were extracted following the factor analysis. Items converged over a solution of one factor; total variance explained = 70.45%, α_Cronbach = 0.96). The results of the confirmatory factor analysis were as follows: the Maximum Likelihood Chi-Square = 129.58 and Degrees of Freedom = 45, which gave a χ²/df = 2.88. For non-centrality fit indices, the Steiger-Lind Root Mean Square Error of Approximation (RMSEA) was 0.08 [0.071–0.106]. Moreover, the Comparative Fit Index (CFI) value was 0.77.

Conclusion

The preliminary results suggest that the LWDS-11 has good psychometric properties to measure waterpipe dependence among adolescents. We hope this tool would serve the benefit of research and epidemiology.

Association between cumulative cigarette and Waterpipe smoking and symptoms of dependence in Lebanese adults

BACKGROUND

Waterpipe and cigarette smoking dependence are becoming increasingly prevalent forms of addiction globally. This study examined whether cumulative cigarette smoking and cumulative waterpipe smoking are associated with higher dependence on both cigarettes and waterpipe.

METHODS

This cross-sectional study conducted between February and April 2020, enrolled 363 participants drawn from all Lebanese districts. The mean age was 29.51 years, 64.8% were females, and 124 (34.2%) exclusive cigarette smokers, 189 (52.1%) exclusive waterpipe smokers, and 50 (13.8%) dual smokers (waterpipe and cigarette). We used the Hooked on Nicotine Checklist (HONC) as an indicator of decreased autonomy towards nicotine, in addition to the Lebanon Waterpipe Dependence Scale-11 (LWDS11) and the Lebanese Cigarette Dependence scale (LCD). A stepwise linear regression was performed taking the HONC scores due to cigarette and waterpipe smoking, LCD and LWDS-11 scores as dependent variables.

RESULTS

The results showed that in the total sample, higher cumulative cigarette smoking (B = 0.005 with a confidence interval of 0.004, 0.006) was significantly associated with higher HONC cigarette scores, whereas higher cumulative waterpipe smoking (B = -0.006 with a confidence interval of - 0.009, - 0.002) was significantly associated with lower HONC cigarette scores. Moreover, higher cumulative waterpipe smoking (B = 0.012 with a confidence interval of 0.009,0.015) was significantly associated with higher HONC waterpipe scores. The results showed that, in both sexes, higher cumulative cigarette smoking was associated with higher HONC cigarette scores and lower HONC waterpipe scores. Furthermore, higher cumulative waterpipe smoking was significantly associated with higher HONC waterpipe scores in both sexes.

CONCLUSION

Our study supports the fact that heavy nicotine consumption, related to both the increased frequency and smoking duration, can increase the risk of dependence. It raises the need for strategic plans to minimize and discourage the use of nicotine products in Lebanese community settings.

COVID-19 and beliefs about tobacco use: an online cross-sectional study in Iran

There is mixed evidence surrounding the relationship between tobacco use and COVID-19 infection/progression. The current study investigates beliefs and tobacco use behaviors and COVID-19 infection among a sample of smokers and never-smokers. Data were collected using an online survey distributed through Telegram, a cloud-based social media networking application in Iran from April 1 to May 31, 2020. The study participants included never-smokers (n = 511), current (past-month) waterpipe smokers (n = 89), current cigarette smokers (n = 158), and ex-smokers (n = 172). Multinomial logistic regression was used to compare tobacco use groups with never- smokers on beliefs, controlling for potential confounders. The study participants (n = 944) was mostly male (64%), had > high school education (76%), and lived in an urban area (91%), with mean ± SD age of 35.3 ± 10.8. Key findings of this study are that compared with never-smokers: (1) cigarette smokers were less likely to believe that smoking cigarette can lead to spreading COVID-19; (2) waterpipe smokers were more likely to believe that smoking waterpipe at home was a safe practice, that waterpipe protects against COVID-19, and smoking waterpipe may lead to a more rapid recovery from COVID-19; (3) both waterpipe and cigarette smokers believed that using e-cigarettes in public places was a safe practice during the COVID-19 pandemic; and (4) more than half of the ex-smokers stopped smoking due to COVID-19 and most of them planned to continue abstaining from smoking after the pandemic. Our findings underscore the need to raise awareness about the unsupported claims of a lower hazard of using tobacco products or possible protective effects against COVID-19 and to promote cessation programs.

Tobacco Research in the Eastern Mediterranean Region: A Scoping Review of Published Studies from Seven Countries

While surveillance on a global scale has been showing a decline in tobacco smoking in the past decade, rates in the Eastern Mediterranean Region (EMR) remained stable with some countries showing rising trends. This study aimed to analyze the landscape of tobacco research in the EMR, present data on publication trends, and identify research gaps and opportunities to guide future tobacco research in the region. We conducted a scoping review of tobacco research in seven countries from January 2000 to December 2013. Three hundred and forty eight studies were identified, the majority of which were published in international journals and in English language. There was an increase in publications over time, with a significant positive linear trend (p = 0.03). Descriptive cross-sectional and case-control studies were the most common study designs (67.0%), and only 8% were longitudinal studies. Papers that reported, in part or solely, on waterpipe tobacco smoking (WTS) constituted 25.6% of the total publication pool. Tobacco consumption was treated as an exposure variable in half of the papers and mostly in relation to cancer and cardiovascular diseases, as an outcome measure in 37.7%, and as a confounding variable in 14.7% of the papers. Studies that examined associations of tobacco with other behaviors (5.3%) were lacking. The scarcity of high-evidence tobacco research in the EMR, together with the relatively deficient data on WTS and associations with other factors warrant the need for discussions on research priority setting and guidance on funding allocations in the region.

The impact of filtered water-pipe smoke on healthy versus cancer cells and their neurodegenerative role on AMPA receptor

Water pipe smoking is highly prevalent in developing countries, especially in Eastern Mediterranean regions. Research finds that more than 100 million people smoke a water pipe. Furthermore, tobacco smoking is one of the leading behavioral factors related to an increased risk of cancer, a leading cause of death globally. We aim to introduce a novel filtration system for water-pipe smoking and evaluate cytotoxic effects of common water pipe condensed smoke in comparison with our novel filtration system on normal (HEK293t) and cancer cell lines (Hep3B and MCF7) by MTS assay, alpha-fetoprotein (aFP), and apoptosis/necrosis effects. More so, the smoke substituents' neurotoxicity effect was evaluated by analyzing the depressive property on AMPA receptors (AMPARs). Our results showed that the silica filtration system was more effective than the water filtration system. The number of toxic compounds was reduced from 145 mg in distilled water extract (DWE) to 57.5 mg in silica solution extract (SSE). The SSE method also showed lower toxicity impacts on normal and cancerous cell lines (HEK293t, Hep3B, and MCF7) with CC₅₀ values 149.9, 10.14, and 8.9 µg/ml, relative to the DWE method (CC₅₀ values 77.1, 3.1, and 5.24 µg/ml, respectively). SSE extraction also reduced the α-FP (tumor marker test) to 2273.3 ng/ml which was closer in value to untreated cells (4066.7 ng/ml) in comparison with DWE which reduced it greatly to 1658.7 ng/ml, and the biophysical properties of AMPAR subunits demonstrate a reduced effect on desensitization rates of GluA2 homomer and GluA1/2 heteromer, using SSE relative to DWE. In conclusion, the condensed smoke of ordinary water pipe (DWE) has cytotoxic and neurotoxic impacts on various cell lines, while our newly developed system (SSE) was less toxic.

Examining the effect of waterpipe specific pictorial health warning labels among young adults in Lebanon and Tunisia: Protocol of a factorial experiment study design

Waterpipe tobacco smoking (WTS) has increased substantially in the Eastern Mediterranean Region (EMR), affecting young adults who perceive waterpipe as safer than cigarette smoking. Applying pictorial health warning labels (HWLs) on tobacco products has been effective in communicating health risks associated with tobacco smoking. However, there are few experimental studies that examined pictorial HWLs specific to WTS. Methods/design: This report describes the design and protocol of the first factorial experimental study that aims to test the effectiveness of pictorial HWLs based on their placement on waterpipe device, tobacco, and charcoal packages among young adult smokers and non-smokers residing in Lebanon and Tunisia. After completing a baseline assessment, participants will be randomly assigned to 3 experimental conditions in a 3 (HWL: pictorial HWL on tobacco package vs. pictorial HWL on 3 placements [device, tobacco, and charcoal packages] vs. text-only HWL on tobacco package) x 4 (pictorial HWLs) x 2 (waterpipe smokers vs. non-smokers) factorial design. We will use a within/between-subject design, where pictorial HWLs and time (pre vs. post-exposure) are the within-subject factors and waterpipe smoking status as the between-subjects factor. Participants will complete post-exposure measures that include attention, perceived harm, intention to quit (smokers) or initiate smoking (non-smokers). Discussion: This is the first international study examining the placements of pictorial HWLs using efficient within/between subject design. Findings will provide additional evidence to convince policymakers to consider three placements of HWLs specific to WTS as a promising regulatory target to curb WTS.

Markers of oxidative stress and toxicant exposure among young waterpipe smokers in the USA

Waterpipe (aka hookah) tobacco smokers are exposed to toxicants that can lead to oxidative DNA and RNA damage, a precursor to chronic disease formation. This study assessed toxicant exposure and biomarkers of DNA [8-oxo-7, 8-dihydro-2'-deoxyguanosine (8-oxodG)] and RNA [8-oxo-7,8-dihydroguanosine (8-oxoGuo)] oxidative damage during smoking of flavored and non-flavored waterpipe tobacco. Thirty waterpipe smokers completed two counterbalanced 2-h lab waterpipe smoking sessions (flavored vs. non-flavored waterpipe tobacco). Urinary concentrations of 8-oxodG and 8-oxoGuo and expired carbon monoxide (eCO) were measured before and after the smoking sessions. A significant increase in the urinary concentrations of 8-oxodG (from 2.12 ± 0.83 to 2.35 ± 0.91 ng/mg creatinine, p = 0.024) and 8-oxoGuo (from 2.96 ± 0.84 to 3.45 ± 0.76 ng/mg creatinine, p = 0.003) were observed after smoking the non-flavored and flavored waterpipe tobacco, respectively. Our results also showed that the mean ± SD of eCO increased significantly after smoking the flavored (from 1.3 ± 1.1 to 20.3 ± 23.6 ppm, p < 0.001) and non-flavored waterpipe tobacco (from 1.8 ± 1.2 to 24.5 ± 26.1 ppm, p < 0.001). There were no significant differences in the means of 8-oxodG (p = 0.576), 8-oxoGuo (p = 0.108), and eCO (p = 0.170) between the flavored and non-flavored tobacco sessions. Smoking non-flavored and flavored waterpipe tobacco leads to oxidative stress and toxicant exposure. Our findings add to the existing evidence about the adverse effects of waterpipe tobacco smoking (WTS) and the need for strong policies to inform and protect young people from the risks of WTS.

Use of toenail-bounded heavy metals to characterize occupational exposure and oxidative stress in workers of waterpipe/cigarette cafés

Tobacco smoke is known for releasing metals in indoor air of waterpipe/cigarette cafés. However, the worker exposure to metals, and its association with oxidative stress in these cafés are still unclear. To this end, 54 workers and 38 customers from waterpipe/cigarette cafés (the exposed group), 30 workers from non-smoking cafés (the control group 1 (CG_1)) and 32 individuals from the general population (the control group 2 (CG_2)) were selected and toenails samples were then taken from them. Our findings revealed a significant difference in terms of toenail-bounded metal levels between the exposure and control groups (CG_1 and CG_2) (Mann-Whitney U test, Pvalue < 0.05). This study has also indicated that "type of tobacco" could be considered as a predictor for toenail-bounded heavy metals. Furthermore, our research's results suggest that toenail-bounded heavy metals are positively and significantly correlated with urinary levels of 8- hydroxy-2'-deoxyguanosine (8-OHdG, as a biomarker for the degradation of deoxyribonucleic acid (DNA) oxidative stress). Therefore, it can be concluded that workers of waterpipe/cigarette cafés are at high risks of adverse health of DNA oxidative degradation.

Transitions in hookah (Waterpipe) smoking by U.S. sexual minority adults between 2013 and 2015: the population assessment of tobacco and health study wave 1 and wave 2

BACKGROUND

Tobacco smoking using a hookah (i.e., waterpipe) is a global epidemic. While evidence suggests that sexual minorities (SM) have higher odds of hookah use compared to heterosexuals, little is known about their hookah use patterns and transitions. We sought to examine transitions between hookah smoking and use of other tobacco and electronic (e-) products among SM adults aged 18 years of age and older versus their heterosexual counterparts.

METHODS

We analyzed nationally representative data of ever and current hookah smokers from Wave 1 (2013-2014; ever use n = 1014 SM and n = 9462 heterosexuals; current use n = 144 SM and n = 910 heterosexuals) and Wave 2 (2014-2015; ever use n = 901 SM and n = 8049 heterosexuals; current use n = 117 SM and n = 602 heterosexuals) of the Population Assessment of Tobacco and Health Study. Comparisons between groups and gender subgroups within SM identity groups were determined with Rao-Scott chi-square tests and multivariable survey-weighted multinomial logistic regression models were estimated for transition patterns and initiation of electronic product use in Wave 2.

RESULTS

Ever and current hookah smoking among SM adults (ever use Wave 1: 29% and Wave 2: 31%; current use Wave 1: 4% and Wave 2: 3%) was higher than heterosexuals (ever use Wave 1: 16% and Wave 2: 16%; current use Wave 1: 1% and Wave 2: 1%; both p < 0.0001). Among SM adults who reported hookah use at Wave 1, 46% quit hookah use at Wave 2; 39% continued hookah use and did not transition to other products while 36% of heterosexual adults quit hookah use at Wave 2 and 36% continued hookah use and did not transition to other products. Compared with heterosexuals, SM adults reported higher use of hookah plus e-products (Wave 2 usage increased by 65 and 83%, respectively).

CONCLUSIONS

Compared to heterosexuals, in addition to higher rates of hookah smoking, higher percentages of SM adults transitioned to hookah plus e-product use between 2013 and 2015. Results have implications for stronger efforts to increase awareness of the harmful effects of hookah as well as vaping, specifically tailored among SM communities.

Association of characters and temperaments with cigarette and waterpipe dependence among a sample of Lebanese adults

It was discovered that the relation between certain personality traits and nicotine dependence differs among ethnicities and cultures; therefore, this study was conducted to determine which temperaments and personality traits are associated with smoking dependence in order to contribute to the development of effective and targeted interventions for smoking dependence within the Lebanese population. A cross-sectional study was carried out between March and April 2020 among a sample of Lebanese adults from all Lebanese governorates. The sample included (N = 501) divided as follows: 62 (12.4%) nonsmokers, 37 (7.4%) cigarette smokers, 266 (53.1%) waterpipe smokers, and 136 (27.1%) mixed smokers. Higher cooperativeness (B = - 0.03) was significantly associated with lower waterpipe dependence. High vs. low education level (B = - 0.97), female gender compared to males (B = - 1.07), higher cooperativeness (B = - 0.01), and higher self-transcendence (B = - 0.01) were significantly associated with lower cigarette dependence, whereas higher age (B = 0.03) was significantly associated with higher cigarette dependence. A multinomial regression analysis, taking the smoking group as the dependent variable, showed that higher harm avoidance (aOR = 0.97) and novelty seeking (aOR = 0.97) were significantly associated with lower cigarette smoking. A high level of education vs. a low one (aOR = 8.85) was significantly associated with higher cigarette smoking. Higher self-transcendence was significantly associated with lower mixed smoking. Being married vs. single (aOR = 2.46) was significantly associated with higher odds of being a mixed smoker, whereas female gender compared to males (aOR = 0.41) was significantly associated with lower odds of being a mixed smoker. These results are pivotal in understanding the relationship between personality and smoking dependence.

The CHRNA5 Polymorphism (rs16969968) and its Association with Waterpipe Smoking Addiction among Jordanians

Waterpipe smoking is a form of tobacco use that causes nicotine/tobacco dependence and has become a global health problem. In the current study, the association of rs16969968 SNP in the CHRNA5 gene with waterpipe dependence was investigated. A total of 386 men and women who used a waterpipe to smoke tobacco were recruited and divided into less dependent and more dependent smokers based on their score on the Lebanon Waterpipe Dependence Scale (LWDS). Results showed a significant difference in the distribution of GG, GA, and AA genotypes by waterpipe dependence status (P<0.001). The more dependent group showed a higher frequency of the AA genotype than the less dependent smokers' group (38% versus 23% respectively). In addition, the more dependent smokers exhibited more A allele than less dependent smokers (53% versus 37% respectively, P<0.001). In conclusion, there is an association between the rs16969968 SNP and waterpipe dependence as assessed by the LWDS.

Smoking practices in relation to exhaled carbon monoxide in an occupational cohort

BACKGROUND

Exposure to carbon monoxide (CO) remains a leading occupational hazard in firefighters, but cigarette and waterpipe smoking likely contributes to the other sources of CO in such workers. The aim of this study was to estimate the contribution of self-reported active cigarette smoking, waterpipe use, and potential job-related sources of CO to the level of exhaled CO in firefighters.

METHODS

We surveyed the personnel of 18 fire stations (N = 842), median age 28 years, who participated at an annual screening not timed to coincide with recent firefighting. We surveyed smoking and waterpipe history, exposure to secondhand smoke (SHS), use of coal for health and biomass for cooking and time since last exposure to firefighting in the workplace. We measured exhaled CO with an instantaneous reading device (piCO Smokerlyzer). We used multivariable regression models to test the association of time since last smoked cigarette (≤12 h) and waterpipe (≤12 h) and time since last fire (≤6 h) with exhaled CO.

RESULTS

In analysis limited to men (93.5% of all surveyed), 42% were daily cigarette; 1% were waterpipe smokers; 94% were exposed to SHS, 29% used coal for heating and 4% used biomass for cooking. The median CO was 4 (interquartile range 3;8) ppm. Age (beta 0.74 per 10 years, p < 0.001), use of biomass fuel for cooking (beta 1.38, p = 0.05), cigarette smoked in the last 12 h (beta 8.22, p < 0.001), waterpipe smoked in the last 12 h (beta 23.10, p < 0.001) were statistically associated with CO, but not time since last fire (≤6 h) (beta 4.12, p = 0.12). There was a significant interaction between older age and firefighting for exhaled CO (p = 0.03).

CONCLUSIONS

Cigarette and recent waterpipe smoking are associated with increased exhaled CO in firefighters. Firefighting itself was a less potent contributor to exhaled CO when measured at an annual screening, but an age interaction was manifested.

Waterpipe use and associated consumer characteristics in the German population: Data from a national representative survey (DEBRA study)

BACKGROUND

Waterpipes (WP) have a long tradition in certain regions of the world, and their use has been increasing worldwide. Current data on the use of WP in different subgroups of the German population are missing.

OBJECTIVE

To estimate the current prevalence of WP use and associated socio-demographic characteristics, tobacco smoking status and e-cigarette usage behaviour in the German population aged ≥14 years; to describe the frequency of use and starting age in current WP users.

METHODS

We analysed data from waves 13-18 (June/July 2018-April/May 2019; N = 12,220) of the German Study on Tobacco Use (DEBRA) - a representative, computer-assisted national household survey. Associations of socio-demographic characteristics, tobacco smoking status and e-cigarette usage behaviour were assessed with multivariable logistic regression models.

RESULTS

A total of 1.8% (n = 217) (95% confidence interval (CI) = 1.5%-2.0%) of the population were current WP users, 13% (n = 1618) (95% CI = 12.3%-13.5%) were ever users. Adjusted multivariable logistic models showed that people with migration background, male sex, younger age, and those who were smokers or used e-cigarettes, were more likely to use a WP. Among current WP users, 15.2% (n = 33) (95% CI = 10.7%-20.7%) had started to use WP at the age of 26 or older, and 23.0% (n = 50) (95%CI = 17.6%-29.2%) had used WP at least once a week or almost daily in the last month.

CONCLUSIONS

In Germany, the use of WP is popular and most strongly associated with migration background and use of tobacco and e-cigarettes. These aspects should be considered when designing future target group-specific prevention strategies.

Analysis of waterpipe aerosol constituents in accordance with the ISO standard 22486

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ISO 22486 to be complemented with real conditions for the evaluation of waterpipe.

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Charcoal is the main contributor to CO and BaP in waterpipe aerosols.

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Correlation between sugars content in tobaccos and formaldehyde yields in aerosols.

This study analyzed commercial waterpipe tobacco products in accordance with the newly developed ISO 22486 as well as with commercial waterpipes and charcoals using the ISO 22486 puffing regime for comparison. The aerosols from these products were analyzed for their nicotine, humectant, tobacco specific nitrosamine, carbonyl, benzo[a]pyrene, and metal yields. Significant differences were observed among the waterpipe tobacco products when analyzed in accordance with the ISO standard 22486 and with different commercial waterpipes and charcoals. The concentrations of CO and benzo[a]pyrene observed in the consumers’ configuration using the ISO 22486 puffing regime (with lit charcoal) were higher than those obtained with the ISO standard using electrical heating, with the yields for carbonyl compounds being lower or higher. The use of the recently published ISO standard for generating water pipe tobacco aerosols should be complemented with analysis by using the consumers’ configuration. The necessity for this was demonstrated by the differences in CO and benzo[a]pyrene yields in the present work. It appears that the temperature (280°C) selected for electrical heating of waterpipe tobacco products in ISO 22486 is somewhat lower than that obtained with commercial charcoals, resulting in a generally lower yield of nicotine and total collected matter. In addition, there is a need to evaluate the contribution of commercial charcoals to the concentration of constituents in waterpipe aerosols. This is particularly true for compounds resulting from charcoal combustion, such as CO and benzo[a]pyrene.

The Syrian Center for Tobacco Studies-13 (SCTS-13): Psychometric evaluation of a waterpipe-specific nicotine dependence instrument

BACKGROUND

Waterpipe tobacco smoking (WTS) has surged globally among young people and causes nicotine dependence (ND). No existing ND instruments are sensitive to waterpipe-specific features of ND and early stages of use.

METHODS

We conducted a psychometric scale evaluation among 192 current waterpipe smokers, initially averaging 15 years of age, recruited from schools in Beirut, Lebanon, and assessed 4 times, 6 months apart. Twenty eight self-report items tapping multiple features of ND were submitted to exploratory and confirmatory factor analyses (EFA and CFA) to reduce items and verify factor structure. Convergent validity was assessed with the Lebanese Waterpipe Dependence Scale and the Hooked on Nicotine Checklist, and discriminant validity with the Depressive Symptom Scale and Adolescent Life Events Stress Scale. Concurrent and predictive validity measures included smoking status and intensity (amount, frequency, session duration, and change in frequency), quitting interest and success, perceived addiction, and smoking alone.

RESULTS

The EFA yielded a single factor, 13 item solution (named the Syrian Center for Tobacco Studies [SCTS]-13) that explained 91% of variance in responses, was internally consistent (Cronbach's alpha and McDonald's omega = 0.87), and captured several positive reinforcement, negative reinforcement, and social/sensory-related features of ND. The CFA indicated good model fit. The SCTS-13 showed acceptable convergent and discriminant validity. Higher SCTS-13 scores predicted current waterpipe and dual (waterpipe and cigarette) smoking, greater intensity of use, less interest in quitting, shorter duration of abstinence, greater perceived addiction, and smoking alone (vs. socially).

CONCLUSION

The SCTS-13 is a promising brief, waterpipe-specific ND instrument.

Effect of sub-chronic exposure to cigarette smoke, electronic cigarette and waterpipe on human lung epithelial barrier function

BACKGROUND

Taking into consideration a recent surge of a lung injury condition associated with electronic cigarette use, we devised an in vitro model of sub-chronic exposure of human bronchial epithelial cells (HBECs) in air-liquid interface, to determine deterioration of epithelial cell barrier from sub-chronic exposure to cigarette smoke (CS), e-cigarette aerosol (EC), and tobacco waterpipe exposures (TW).

METHODS

Products analyzed include commercially available e-liquid, with 0% or 1.2% concentration of nicotine, tobacco blend (shisha), and reference-grade cigarette (3R4F). In one set of experiments, HBECs were exposed to EC (0 and 1.2%), CS or control air for 10 days using 1 cigarette/day. In the second set of experiments, exposure of pseudostratified primary epithelial tissue to TW or control air exposure was performed 1-h/day, every other day, until 3 exposures were performed. After 16-18 h of last exposure, we investigated barrier function/structural integrity of the epithelial monolayer with fluorescein isothiocyanate-dextran flux assay (FITC-Dextran), measurements of trans-electrical epithelial resistance (TEER), assessment of the percentage of moving cilia, cilia beat frequency (CBF), cell motion, and quantification of E-cadherin gene expression by reverse-transcription quantitative polymerase chain reaction (RT-qPCR).

RESULTS

When compared to air control, CS increased fluorescence (FITC-Dextran assay) by 5.6 times, whereby CS and EC (1.2%) reduced TEER to 49 and 60% respectively. CS and EC (1.2%) exposure reduced CBF to 62 and 59%, and cilia moving to 47 and 52%, respectively, when compared to control air. CS and EC (1.2%) increased cell velocity compared to air control by 2.5 and 2.6 times, respectively. The expression of E-cadherin reduced to 39% of control air levels by CS exposure shows an insight into a plausible molecular mechanism. Altogether, EC (0%) and TW exposures resulted in more moderate decreases in epithelial integrity, while EC (1.2%) substantially decreased airway epithelial barrier function comparable with CS exposure.

CONCLUSIONS

The results support a toxic effect of sub-chronic exposure to EC (1.2%) as evident by disruption of the bronchial epithelial cell barrier integrity, whereas further research is needed to address the molecular mechanism of this observation as well as TW and EC (0%) toxicity in chronic exposures.

National Estimates of hospital emergency department visits due to acute injuries associated with hookah smoking, United States, 2011-2019

INTRODUCTION

Hookah (also known as waterpipe) smoking is associated with acute adverse health effects such as vomiting and fainting, symptoms related to carbon monoxide poisoning, and decreased pulmonary function, however, national estimates of hookah-related acute injuries are not currently available in the scientific literature. This study provides national estimates of United States hospital emergency department visits due to hookah-related acute injuries.

METHODS

We analyzed 2011-2019 data from the National Electronic Injury Surveillance System to calculate national estimates of emergency department visits due to hookah-related acute injuries. National Electronic Injury Surveillance System data were gathered from approximately 100 United States hospitals selected as a probability sample of approximately 5000 hospitals with emergency departments. Each case contains information abstracted from all emergency department records involving injuries associated with consumer products. All individuals admitted to emergency departments who sustained hookah-related acute injuries were included in the study.

RESULTS

During 2011-2019, an estimated 1371 (95% confidence interval: 505-2283) United States hospital emergency department visits were related to hookah-related acute injuries. The most common injuries were sustained from dizziness/light-headedness and syncopal episodes (54.8%), followed by burns (41.5%). Young adults aged 18-24 years accounted for 66.8% of hookah-related acute injuries admitted to United States emergency departments.

CONCLUSIONS

This study provides national estimates of hospital emergency department visits due to hookah-related acute injuries. We found that hookah smoking related AIs mostly occurred among young adults. Study findings may inform public health policy and educational intervention efforts to prevent these events and complement other acute injury surveillance systems, such as the National Poison Data System.

Evaluation of waterpipe smoke toxicity in C57BL/6 mice model

Waterpipe smoking is a popular pastime worldwide with statistics pointing to an alarming increase in consumption. In the current paper, the evaluation of sub-chronic waterpipe smoke exposure was undertaken using C57BL/6 female mice using a dynamic exposure setting to emulate smoke exposure. Mice were daily subjected to either one (single exposure, SE) or two sessions (double exposure, DE) of waterpipe-generated smoke (two-apple flavor) for a period of two months. Although lungs histopathological examination pointed to a minor inflammation in smoke-exposed mice compared to control air-exposed (CON) group, the lung weights of the waterpipe-exposed mice were significantly higher (+72% in SE and +39% in DE) (p < 0.01) when compared to CON group. Moreover, changes in the protein expression of several proteins such as iNOS and JNK were noted in the lungs of smoke-exposed mice. However, no changes in p38 and EGFR protein levels were noted between the three groups of mice. Our results mainly showed a significant increase in urea serum levels (+28%) in SE mice along with renal pathological damage in both SE and DE mice compared to CON. Additionally, severe significant DNA damages (p < 0.05) were reported in the lungs, kidneys, bone marrow and liver of waterpipe-exposed animals, using MTS and COMET assays. These findings highlighted the significant risks posed by sub-chronic waterpipe smoke exposure in the selected animal model and the pressing need for future better management of waterpipe indoor consumption.

Puffing topography and physiological responses in men and women with low versus high waterpipe dependence during smoking: The WiHi Irbid project

BACKGROUND

Waterpipe smoking is spreading worldwide, and it is associated with many adverse effects. The aim of this study was to investigate the interaction of waterpipe smoking puffing topography, and related physiological measures, with both gender and level of dependence on waterpipe.

METHOD

Exclusive waterpipe smokers were asked to smoke a single waterpipe session in a specialized laboratory while their smoking topography, and in-breath CO level were recorded pre- and post- smoking. Waterpipe dependence was measured using the LWDS-11 scale.

RESULTS

In the high dependence group, the total number of puffs, was greater in men than women. In addition, the average flow rate was greater in men with high compared to low dependence. For inter-puffing intervals, greater values were recorded in men and women with low versus high dependence. No other differences were found between the subgroups in total session time, average puff duration, average puff volume, and maximum flow rate. Pre-smoking CO content and CO boost were greater in men versus women in both dependence groups. Post-smoking CO content was greater in women with high versus low dependence, whereas it was lower in women versus men with low dependence.

CONCLUSIONS

The current results indicate several effects for waterpipe smoking dependence on smoking topography. Many of these differences were gender dependent with men having higher exposure than women in most aspects.

Determination of metals and BTEX in different components of waterpipe: charcoal, tobacco, smoke and water

BACKGROUND

The main objective of this study was to evaluate the concentrations of heavy metals and BTEX (benzene, toluene, ethylbenzene and xylene) in smoke and water bowl of 5-most commonly used tobacco brand in waterpipe in Tehran, the capital of Iran.

METHODS

Five types of conventional tobacco in Tehran were investigated. Heavy metals and BTEX were analyzed in waterpipe smoke, tobacco, charcoal and water bowl prior to and after smoking by using ICP-OES and GC-MS, respectively.

RESULTS

Our results indicated that Khansar and Al Fakher brands had the maximum and minimum concentrations of metals among tobacco consumed, respectively. The results showed that there was a significant difference between content of heavy metals in burned and unburned tobacco. The highest and lowest concentrations of metals were related to Fe and Hg, respectively.

CONCLUSION

Results showed that tobacco, charcoal and smoke of waterpipe contained significant contents of toxic metals and BTEX, and exposure to these components could be the main reason for the concerns about waterpipe smoking.