Tobacco Use Worldwide: Legislative Efforts to Curb Consumption

Trends in tracheal, bronchial and lung cancer attributed to smoking in South America: Global Burden of Disease analysis 1990-2019

Objective

To investigate the burden of tracheal, bronchus, and lung (TBL) cancer due to tobacco exposure in the last 30 years in 12 South American countries.

Methods

We used the Global Burden of Disease (GBD) 2019 exposure-response function to analyze the total tobacco, smoking, and secondhand smoke exposure-related TBL cancer deaths and disability-adjusted life years (DALYs), for 12 South American countries, between 1990 and 2019. Metrics were described as absolute numbers or rates per 100 000 individuals. The relative change in burden was assessed by comparing the 1990-1994 to 2015-2019 periods.

Results

In 2019, the all-ages number of TBL cancer deaths and DALYs associated with tobacco exposure in South America was 29 348 and 658 204 in males and 14 106 and 318 277 in females, respectively. Age-adjusted death and DALYs rates for the region in 2019 were 182.8 and 4035 in males and 50.8 and 1162 in females, respectively. In males, 10/12 countries observed relative declines in TBL death rates attributed to tobacco exposure while only 4 countries reduced their mortality in females.

Conclusion

While significant efforts on tobacco control are under place in South America, substantial burden of TBL cancer persists in the region with significant sex-specific disparities. Increased country-specific primary data on TBL cancer and tobacco exposure is needed to optimize healthcare strategies and improve comprehension of regional trends.

Prevalence and Assessment of Knowledge, Attitudes, and Practices of Tobacco Use Among Medical and Dental Students in Bhubaneswar, Odisha

Background Tobacco use remains a significant global public health concern, causing millions of preventable and premature deaths annually and imposing substantial economic burdens. India, the second-largest producer and consumer of tobacco products worldwide, bears a significant burden of tobacco-related morbidity and mortality. Medical and dental students represent the future healthcare workforce and role models; hence, their tobacco consumption and attitude would play a vital role in tobacco control. This study aims to estimate the prevalence and assess the knowledge, attitudes, and behaviors regarding tobacco use among medical and dental students in Bhubaneswar, Odisha. Methods A descriptive cross-sectional study was conducted using the Global Health Professional Students Survey (GHPSS) questionnaire. The study included third-year Bachelor of Medicine and Bachelor of Surgery (MBBS) and Bachelor of Dental Surgery (BDS) students from two private medical and two dental colleges in Bhubaneswar, Odisha. Data were collected from February to April 2019 through anonymous self-administered questionnaires, and descriptive and bivariate analyses were performed. Results A total of 400 students were surveyed, with 16% reporting being current smokers (24.3% males, 8.7% females). Furthermore, 36.8% had tried cigarettes and other tobacco products. Nonsmokers demonstrated stronger support for comprehensive tobacco control policies, such as banning advertising and smoking in public places, compared to current smokers. Most students acknowledged the importance of recording tobacco use history and providing educational materials; however, only around 40% had received formal training on smoking cessation. Conclusion The findings highlight the need for targeted intervention among medical and dental students for tobacco cessation. It is vital to foster a positive attitude toward tobacco control among future healthcare professionals. Health professional institutions should take proactive steps to prevent tobacco use among students and develop initiatives to motivate successful cessation training. Investing in tobacco control education for healthcare professionals is crucial to empower them in tobacco cessation efforts and promote healthier societies.

Male Youth Tobacco Usage Pattern in Banned Smoking Area in Comparison With Non-banned Smoking Area: A Cross-Sectional Study

OBJECTIVES

This study aimed to assess the impact of smoking bans in schools on smoking prevalence and behavior among Saudi male youth aged 13-15 years.

METHODS

A cross-sectional comparative study was conducted involving students from two intermediate schools in Jeddah - one with a smoking ban and the other without. Data collection utilized the Global Youth Tobacco Survey questionnaire, and statistical analysis was performed using SPSS version 21.0.

RESULTS

The study had a 93.9% response rate, with 659 students participating. Notably, a lower percentage of ever-smoking was observed in the banned area compared to the non-banned area (39.6% vs. 50.9%; p=0.002). Current smoking rates were also lower in the banned area (14.2% vs. 23.8%; p=0.014). Family and peer influences on smoking were reduced in the banned area, and more students discussed the harmful effects of smoking with family (72.8% vs. 59.8%; p=0.003). Students in the non-banned area found it easier to access cigarettes. A significantly higher percentage of students in the banned area were resolute in not smoking if offered a cigarette by their best friend (65.0% vs. 59.2%; p=0.006). Students in the non-banned area reported higher exposure to cigarette smoke at home and in other places compared to those in the banned area (15.8% vs. 10.8%; p=0.008), respectively. A higher percentage of smokers in the banned area expressed a desire to quit smoking, though the difference was not statistically significant. More anti-smoking media messages were reported in the banned area (35.6% vs. 33.6%; p=0.004). Fewer respondents in the banned area had items with cigarette brand logos (13.6% vs. 19.9%; p=0.03).

CONCLUSION

The findings underscore the effectiveness of smoking bans in schools in reducing smoking prevalence among students. This suggests a broader societal shift in attitudes toward smoking, highlighting the need for comprehensive bans as part of public health strategies. However, there remains a need for targeted interventions to address the complexities of smoking behavior in both banned and non-banned areas.

Susceptibility to smoking and determinants among never-smoking high school students in Thailand

INTRODUCTION

To prevent youth from becoming smokers, it is essential to understand factors contributing to them becoming susceptible to smoking. The aim of this study was thus to estimate the prevalence of smoking susceptibility among neversmoking youth in Thailand and to identify determinants associated with such behavior.

METHODS

Cross-sectional data for 4572 eighth-grade students (aged 13-15 years) from 120 secondary schools were obtained from a classroom-based survey using a self-administered questionnaire. Using data from never-smoking students (n=3180), simple and multiple logistic regression analyses were performed to identify factors associated with smoking susceptibility. Frequencies and proportions for descriptive statistics are reported along with adjusted odds ratios and 95% confidence intervals for logistic regression models.

RESULTS

A total of 16.4% of Thai never-smoking youth were susceptible to smoking. Several variables of interest were identified in multivariable analysis as significantly associated with increased susceptibility to smoking: being male (AOR=3.16; 95% CI: 25.4-3.92), having a positive attitude toward smoking - agreeing that smoking displays maturity (AOR=1.49; 95% CI: 1.07-2.09), the perception that smoking helps relieve stress (AOR=1.57; 95% CI: 1.14-2.15), the presence of current smoking peers (AOR=2.04; 95% CI: 1.57-2.66), exposure to secondhand smoking in public (AOR=1.51; 95% CI: 1.17-1.94), exposure to online cigarette and smoking-related advertising occasionally (AOR=1.98; 95% CI: 1.49-2.65), attendance at schools where there are sometimes anti-smoking education activities (AOR=1.57; 95% CI: 1.18-2.07); as well as exposure to anti-tobacco messages rarely (AOR=1.40; 95% CI: 1.05-1.87), occasionally (AOR=1.48; 95% CI: 1.12-1.96) and infrequently (AOR=1.41; 95% CI : 1.07-1.87).

CONCLUSIONS

Approximately one in six Thai never-smoking youth was found to be susceptible to smoking. Findings suggest it should be useful to supplement relevant tobacco prevention and control efforts by considering such interpersonal and socio-environmental determinants, among vulnerable people to smoke.

Sex differences in cardiac remodeling post myocardial infarction with acute cigarette smoking

Background

Whether cigarette smoking affects the heart post-myocardial infarction (MI) in a sex-dependent way remains controversial. Using a mouse model, we investigated cardiac remodeling under the influence of acute cigarette smoke (CS) exposure following ischemic injury in both sexes.

Methods

Ten cigarettes were smoked twice daily for 2 weeks followed by MI and then 1 additional week post permanent LAD ligation. Cardiac function, histology, and infarct size were assessed, and inflammatory markers quantified by RT–PCR. Statistical comparisons were performed using an unpaired t test or ANOVA followed by Tukey post hoc test.

Results

We observed that cigarette smoking exacerbated both left and right ventricular remodeling only in males at an early stage of post-MI. Females did not display a significant structural and/or functional alteration within 7 days of cardiac remodeling post-MI upon CS exposure. Worsened right ventricular remodeling in males was independent of pulmonary congestion. CS-exposed males exhibited enhanced increases in left ventricular end systolic and diastolic volumes, as well as reductions in ejection fraction and fractional area changes of left ventricular base. At day 7, infarct size was increased by cigarette smoking in males only, which was accompanied by enhanced collagen deposition in both the infarcted and peri-infarcted areas. Both IL-6 and TNF-α mRNA expression significantly increased in CS-exposed MI male group only at day 7 post-MI suggestive of prolonged inflammation.

Conclusions

These findings indicate that CS exposure worsens the progression of cardiac remodeling post-MI in male sex in a significant manner compared to female sex at least at early stages.

Alleviation of nicotine-induced reproductive disorder, clastogenicity, and histopathological alterations by fenugreek saponin bulk and nanoparticles in male rats

Nicotine is the most abundant ingredient in cigarette smoking and has serious side effects on the lung, heart, reproductive system, and many other human organs. Saponins extracted from many plants exhibit multiple biological actions such as anti-cancer effects. Therefore, the possible protective effect of fenugreek saponin (FS) and nanofenugreek saponin (NFS) against nicotine-induced toxicity in male rats was investigated in this study. Animals were divided into a control group and the nicotine (1.5 mg/kg/day), FS (25, 50, and 100 mg/kg/day), or/and NFS (20, 40, and 80 mg/kg/day) administered groups. Micronucleus assay, histopathological, and sperm abnormality examinations as well as measurement of the acetylcholinesterase (AChE) gene expression were conducted. Our findings revealed that nicotine treatment induced significant increases in the incidence of micronucleus, sperm abnormalities, and expression levels of AChE in addition to inducing histopathological changes in rat testis. On the other hand, administration of FS or NFS with nicotine significantly decreased the incidence of micronuclei and the percentage of sperm abnormalities as well as the expression levels of AChE gene. Moreover, nicotine-induced histological alterations were reduced by given FS or NFS with nicotine. In conclusion, nicotine-induced sperm abnormalities, chromosomal damage, and histological injuries were mitigated by administration of FS or NFS with nicotine, and thus, FS and NFS could be used as ameliorating agents against nicotine toxicity.

Menthol and flavored tobacco products in LMICs: A growing menace

INTRODUCTION

High income jurisdictions are banning menthol/flavored cigarettes and other tobacco products because they attract young people and create dependence. This study explores the importance of menthol and other flavored tobacco products for tobacco markets in low- and middle-income countries (LMICs), identifies countries where the menthol/flavor share is particularly high or rapidly growing, and identifies strategies tobacco companies are using to develop menthol/flavor markets.

METHODS

Research involved analysis of menthol/flavor market data from 2005 to 2019, a systematic review of academic literature, and a scoping exercise with our advocate contacts in LMICs.

RESULTS

The median menthol/capsule market share of the cigarette market grew significantly (p<0.05) between 2005 and 2019, both in lower and upper middle-income countries [lower: 2.5% (IQR: 0.5-4.0) to 6.5% (IQR: 3.6-15.9); and upper: 4.0% (IQR: 0.8-9.8) to 12.3% (IQR: 3.5-24.3)]. Countries with both high market share and high market share growth were Russia, Guatemala, Peru and Nigeria. No market data were available on low-income countries, but the academic literature suggested high prevalence of menthol use in Zambia. Tobacco industry strategies underpinning growth of menthol/flavored tobacco use in LMICs included in-store marketing and display, colorful packs and non-conventional flavor names.

CONCLUSIONS

Menthol/flavor tobacco products are a growing problem in LMICs. In addition to menthol/flavor bans, we recommend marketing bans, point of sale display bans and standardized packaging.

Tobacco Smoking and Liver Cancer Risk: Potential Avenues for Carcinogenesis

Smoking a cigarette generates over 4000 chemicals that have a deleterious impact on each part of the human body. It produces three main severe effects on the liver organ: oncogenic, immunological, and indirect or direct toxic effects. It results in the production of cytotoxic substances, which raises fibrosis and necro-inflammation. Additionally, it also directs the production of pro-inflammatory cytokines tumour necrosis factor alfa (TNF-α) and interleukins (IL-1β, IL-6) that will be responsible for the chronic liver injury. Furthermore, it gives rise to secondary polycythemia and successively raises the turnover and mass of red cells, which might be a common factor responsible for the development of oxidative stress in the liver due to iron overload. It also produces chemicals that are having oncogenic properties and raises the risk of liver cancer especially in sufferers of chronic hepatitis C. Smoking modulates both humoral and cell-mediated responses by restricting the proliferation of lymphocytes and inducing their apoptosis and ultimately decreasing the surveillance of cancer cells. Moreover, it has been determined that heavy smoking impacts the response of hepatitis C patients to interferon (IFN) therapy through different mechanisms, which can be improved by phlebotomy. Efforts are being made in different nations in decreasing the prevalence of smoking to improve premature death and ill effects of their nation's individuals.

Knowledge, attitude, and beliefs toward group behavior therapy programs among male adults attending smoking cessation clinics, cross-sectional analysis

Background

Group therapy assists individuals in learning many behavioral techniques for smoking cessation and providing each other with mutual support. Group behavior therapy is not routinely provided as a modality of tobacco cessation assistance in tobacco cessation clinics in Saudi Arabia despite it is effectiveness. Therefore, this study aimed to assess the knowledge, attitude, and beliefs toward group behavior therapy programs among male adults who attend smoking cessation clinics and to identify the associated factors.

Methods

A cross-sectional study was conducted with a targeted sample of 229 males aged 18 and above who were attending smoking cessation clinics. The participants were randomly selected. Data were collected using a paper-based questionnaire. One-way ANOVA and chi-square test were used for statistical analysis.

Results

Results showed a high percentage of the study participants were in the age group of 21–40 years. Most of them were consuming 10–20 cigarettes per day. Around 79% of the participants had previous attempted to quit smoking. This study demonstrated a deficit in knowledge about group behavior therapy. The mean score for attitude and beliefs was 5.3 out of 11. Multiple factors influenced their attitudes and beliefs, such as previous attempts to quit smoking (p-value < 0.05) and the number of cigarettes used per day (p-value = 0.03). The knowledge was found to be affected by the level of education (p-value = 0.04).

Conclusion

The study demonstrates a deficit in knowledge about group behavior therapy and it shows that the level of education was associated with the knowledge. Additionally, previous attempts to quit smoking and the number of cigarettes used per day, influenced the participants’ attitude and beliefs toward group behavioral therapy. Increase awareness about the role of group behavior therapy in smoking cessation is required before this method is implemented in the routine practice.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12889-021-10924-4.

Association between Cigarette Smoking and Physical Fitness Level of Korean Adults and the Elderly

Although previous studies have examined the relationship between smoking and physical fitness, they only considered current smoking status and the same fitness measurements regardless of age. This study investigated differences in physical fitness based on tobacco smoking habits. A total of 2830 non-elderly adults (NEA; 19–64 years) and 629 elderly (65–89 years) participated in the study, using data extracted from a Korean national database. One-way ANCOVA and ANOVA were conducted to analyze the results. The subjects were classified into three groups (smokers, those who had quit, and never-smokers). In NEA men, a significant difference was observed in 50-m dash (p = 0.003) and 20-m shuttle-run (p < 0.001), while in elderly men differences were only seen in sit-ups (p = 0.015). In the case of NEA and elderly women, no significant differences were observed in physical fitness levels (p > 0.05). The decreased fitness level due to smoking was more noticeable in men than in women, and in NEA more than in elderly persons. A non-smoking policy and customized training based on age or gender are necessary to increase fitness and improve health conditions.

Dysbiosis of lower respiratory tract microbiome are associated with inflammation and microbial function variety

BACKGROUND

Lower respiratory tract (LRT) microbiome has been reported to associate with pulmonary diseases. Unregulated inflammation is an underlying cause of variable lung diseases. The lung microbiome may play an important role in the smoking-induced inflammatory lung diseases. What's more, the function of microbiome may be more important for understanding how microbes interact with host. Our study aims to explore the effects of smoking on the lower respiratory tract microbiome, the association between variation of lower respiratory tract microbiome and inflammation and whether smoking exposure changes the function of lower respiratory tract microbime.

METHODS

Forty male mice were randomly divided into smoking group and non-smoking group, and the smoking group was exposed to cigarette smoke for 2 h per day for 90 days. After experiment, the blood samples were collected to measure the concentration of interleukin-6 (IL-6) and C reactive protein (CRP) by ELISA. Lung tissue samples were used to detect the community and diversity of lower respiratory tract microbiome through 16S rRNA gene quantification and sequencing technology. ANOSIM and STAMP were performed to analyze the differences of the microbial community structure between smoking group and non-smoking group. SPSS 24.0 software was used to analyze the correlations between microbiome and inflammation mediators through scatter plots and Spearman correlation coefficient. Microbial metabolic function was predicted by PICRUSt based on the 16 s rRNA gene quantification and sequencing results. PATRIC database was searched for the potential pathogenic bacteria in lower respiratory tract.

RESULTS

Our results suggested that smoking had markedly effects on the microbiota structure of lower respiratory tract based on Bray-Curtis distance (R2 = 0.084, p = 0.005) and on unweighted uniFrac distance (R2 = 0.131, p = 0.002). Smoking mainly affected the abundance of microbiome which belong to Proteobacteria phyla and Firmicutes phyla. Moreover, our results also found that smoking increased the abundance of Acinetobacter, Bacillus and Staphylococcus, which were defined as pathogenic bacteria. Inflammatory mediators were observed to associate with certain microbiome at every level. Most of microbiome which were associated with inflammation belonged to Proteobacteria phyla or Firmicutes phyla. Moreover, we found that the decreased microbiome in smoking group, including Oceanospirillales, Desulfuromonadales, Nesterenkonia, and Lactobacillaceae, all were negatively correlated with IL-6 or CRP. Based on the level of inflammation, the abundance of microbiome differs. At genus level, Lactobacillus, Pelagibacterium, Geobacter and Zoogloea were significantly higher in smoking group with lower IL-6 concentration. The abundance of microbiome was not observed any statistical difference in subgroups with different weight. Three dominant genus, defined as pathogen, were found higher in the smoking group. The microbial functional prediction analysis revealed that ABC-type transport systems, transcription factors, amino acide transport and metabolism, arginine and proline metabolism et al. were distinctively decreased in smoking group, while the proportions of replication, recombination and repair, ribosome, DNA repair and recombination proteins were increased in smoking group (q < 0.05).

CONCLUSIONS

Members of Proteobacteria phyla and Firmicutes phyla played an important role in the microbial community composition and keeping a relatively balanced homeostasis. Microbiome dysbiosis might break the balance of immune system to drive lung inflammation. There might exist potential probiotics in lower respiratory tract, such as Lactobacillaceae. The altered function of Lower respiratory tract microbiome under smoking exposure may affect the physiological homeostasis of host.