Tobacco smoking and mortality among Aboriginal and Torres Strait Islander adults in Australia

Counting the Ways That Aboriginal and Torres Strait Islander Older People Participate in Their Communities and Culture

OBJECTIVES

This study aimed to determine the proportion of older Aboriginal and Torres Strait Islander peoples participating in cultural events and activities and determine the demographic and sociocultural characteristics associated with participation.

METHODS

The Australian Bureau of Statistics National Aboriginal and Torres Strait Islander Social Survey (2014-2015) was used to measure the prevalence of participation in cultural events and activities. Multivariate logistic regression models were used to measure associations. Sociocultural factors were selected by matching survey items to the 12 sociocultural factors described in the Good Spirit Good Life Framework, a culturally validated quality-of-life tool for older people.

RESULTS

The majority (62.0%) of survey respondents 45 years and older participated in cultural events (e.g., ceremonies, funerals/sorry business, NAIDOC week activities, sports carnivals, festivals/carnivals) or were involved in organizations. Many (58.5%) also participated in activities (e.g., fishing, hunting, gathering wild plants/berries, arts/crafts, music/dance/theater, writing/telling of stories). In regression models including demographic and cultural variables, participation in cultural events was highest among people living remotely (odds ratio [OR] = 2.71), reporting recognition of homelands (OR = 2.39), identifying with a cultural group (OR = 3.56), and those reporting having a say in their communities (OR = 1.57), with similar odds seen for participation in activities. Participation was inversely proportional to increasing age, with a greater proportion of females participating in events and males in activities.

DISCUSSION

The social lives of older Aboriginal and Torres Strait Islander people were characterized by widespread participation in cultural events and activities. These findings provide important insights into services as they support older people to live a good life.

Investigation of smoking on the antiplatelet response to clopidogrel: Unravelling the smoker's paradox

The intricate relationship between smoking and the effects of the antiplatelet drug clopidogrel has been termed the "smoker's paradox". This paradox details the enhanced efficacy of clopidogrel in smokers compared to non-smokers. This review begins with an exploration of the proposed mechanisms of the smoker's paradox, particularly drawing attention to the induction of cytochrome P450 (CYP) isoenzymes via tobacco smoke, specifically the enzymes CYP1A2 and CYP2C19. Moreover, an investigation of the effects of genetic variability on the smoker's paradox was undertaken from both clinical and molecular perspectives, delving into the effects of ethnicity and genetic polymorphisms. The intriguing role of CYP1A2 genotypes and the response to clopidogrel in smoking and non-smoking populations was examined conferring insight into the individuality rather than universality of the smoker's paradox. CYP1A2 induction is hypothesised to elucidate the potency of smoking in exerting a counteracting effect in those taking clopidogrel who possess CYP2C19 loss of function polymorphisms. Furthermore, we assess the comparative efficacies of clopidogrel and other antiplatelet agents, namely prasugrel and ticagrelor. Studies indicated that prasugrel and ticagrelor provided a more consistent effect and further reduced platelet reactivity compared to clopidogrel within both smoking and non-smoking populations. Personalised dosing was another focus of the review considering patient comorbidities, genetic makeup, and smoking status with the objective of improving the antiplatelet response of those taking clopidogrel. In summation, this review provides insight into multiple areas of research concerning clopidogrel and the smoker's paradox taking into account proposed mechanisms, genetics, other antiplatelet agents, and personalised dosing.

The social determinants of Aboriginal and Torres Strait Islander adults who do not smoke in regional Australia

INTRODUCTION

Commercial tobacco use was systematically embedded as a valuable commodity through colonisation that continues to be exploited for profit by the Tobacco Industry. There have been significant declines in current smoking prevalence among Aboriginal and Torres Strait Islander peoples 18 years and over, from 55% in 1994 to 43% in 2018-2019. This paper seeks to better understand smoke-free behaviours, and to systematically quantify associations between a range of SDOH and non-smoking/never-smoking among Aboriginal and Torres Strait Islander adults (≥18) living in regional Australia.

OBJECTIVE

To explore the social determinants of health (SDOH) related to non- and never-smoking among Aboriginal and Torres Strait Islander peoples in regional Australia.

DESIGN

Cross-sectional analysis of the NATSIHS, weighted to the Aboriginal and Torres Strait Islander adult population living in regional Australia, was conducted. Participants were characterised as people who were current smokers, never-smokers and non-smokers (ex- and never-smokers). The social determinants of health exposures related to socioeconomic position, well-being and access to healthcare.

SETTING

Regional Australia is distinct from urban and remote areas, based on the ASGS Remoteness Structure (ABS) 2018-2019.

PARTICIPANTS

Aboriginal and Torres Strait Islander adults (≥18 years) who were selected, consented and asked questions about smoking in the National Aboriginal and Torres Strait Islander Health Survey (NATSIHS 2018/19).

RESULTS

High income was associated with non-smoking (Prevalence Ratio [PR] = 2.07; 95% CI: 1.66-2.57) and never-smoking (PR = 2.02; 1.46-2.79), as was completing year 10 (non-smoking PR = 1.34; 1.12-1.61 and never-smoking PR = 1.56; 1.20-2.03). Better food security was associated with a higher prevalence of never-smoking (PR = 2.42; 1.48-3.98). Lower psychological distress scores were associated with non-smoking (PR = 1.30; 1.10-1.53) and never-smoking (PR = 1.56; 1.21-2.01). Never-smoking was more frequent in participants reporting no experiences of unfair treatment (PR = 1.59; 1.22-2.06). Having a usual healthcare provider was associated with non-smoking (PR = 1.38; 1.02-1.86). Positive exposure to the SDOH were associated with non- and never-smoking among Aboriginal and Torres Strait Islander adults in regional Australia. Structural and systemic changes to address the SDOH, including discrimination and racism, are expected to accelerate non-smoking behaviours and improve health outcomes for Aboriginal and Torres Strait Islander peoples.

Delivery of tobacco control programs by Aboriginal Community Controlled Health Organisations in New South Wales, Australia: A cross-sectional survey

ISSUE ADDRESSED

To describe the characteristics of tobacco control programs (TCPs) delivered by Aboriginal Community Controlled Health Services (ACCHSs) in New South Wales (NSW), Australia.

METHODS

A key informant from each ACCHS in NSW completed a 30-item online survey. For each TCP, ACCHSs were asked to provide: the target population group, program aims and activities, funding source, and whether the program had been monitored or evaluated and reflected principles of community control and engagement.

RESULTS

Twenty-five of 38 eligible ACCHSs completed the survey (66% response rate). Overall, 64% of services reported currently delivering at least one TCP, almost all of which aimed to promote quitting (95%). Programs involved brief intervention for tobacco cessation (71%), referral to quit services (67%), or use of printed resources (67%). Funding sources included Local Health Districts (52% of programs), the Commonwealth Government (48%) and NSW Ministry of Health (43%). Most programs were aimed at all Aboriginal people who smoke (76%); 19% targeted women or families during pregnancy/birth. Many TCPs used culturally tailored resources (86%) and employed Aboriginal staff (86%), and 48% had been evaluated.

CONCLUSIONS

A third of participating ACCHS did not have a specific TCP to address smoking among Aboriginal people, and delivery of programs was characterised by an uncoordinated approach across the state. Aboriginal staff and culturally tailored messages were a focus of existing TCP programs. SO WHAT?: Findings highlight the need for more investment in TCPs for Aboriginal people to ensure all ACCHSs can deliver evidence-based programs.

Accelerated aging mediates the associations of unhealthy lifestyles with cardiovascular disease, cancer, and mortality

BACKGROUND

With two well-validated aging measures capturing mortality and morbidity risk, this study examined whether and to what extent aging mediates the associations of unhealthy lifestyles with adverse health outcomes.

METHODS

Data were from 405,944 adults (40-69 years) from UK Biobank (UKB) and 9972 adults (20-84 years) from the US National Health and Nutrition Examination Survey (NHANES). An unhealthy lifestyles score (range: 0-5) was constructed based on five factors (smoking, drinking, physical inactivity, unhealthy body mass index, and unhealthy diet). Two aging measures, Phenotypic Age Acceleration (PhenoAgeAccel) and Biological Age Acceleration (BioAgeAccel) were calculated using nine and seven blood biomarkers, respectively, with a higher value indicating the acceleration of aging. The outcomes included incident cardiovascular disease (CVD), incident cancer, and all-cause mortality in UKB; CVD mortality, cancer mortality, and all-cause mortality in NHANES. A general linear regression model, Cox proportional hazards model, and formal mediation analysis were performed.

RESULTS

The unhealthy lifestyles score was positively associated with PhenoAgeAccel (UKB: β = 0.741; NHANES: β = 0.874, all p < 0.001). We further confirmed the respective associations of PhenoAgeAccel and unhealthy lifestyles with the outcomes in UKB and NHANES. The mediation proportion of PhenoAgeAccel in associations of unhealthy lifestyles with incident CVD, incident cancer, and all-cause mortality were 20.0%, 17.8%, and 26.6% (all p < 0.001) in UKB, respectively. Similar results were found in NHANES. The findings were robust when using another aging measure-BioAgeAccel.

CONCLUSIONS

Accelerated aging partially mediated the associations of lifestyles with CVD, cancer, and mortality in UK and US populations. The findings reveal a novel pathway and the potential of geroprotective programs in mitigating health inequality in late life beyond lifestyle interventions.

Don't Follow the Smoke-Listening to the Tobacco Experiences and Attitudes of Urban Aboriginal Adolescents in the Study of Environment on Aboriginal Resilience and Child Health (SEARCH)

Preventing smoking among young Aboriginal people is important for reducing health inequities. Multiple factors were associated with adolescent smoking in the SEARCH baseline survey (2009-12) and discussed in a follow-up qualitative study that aimed to inform prevention programs. Twelve yarning circles were facilitated by Aboriginal research staff at two NSW sites in 2019 with 32 existing SEARCH participants aged 12-28 (17 female, 15 male). Open discussion around tobacco was followed by a card sorting activity, prioritising risk and protective factors and program ideas. The age of initiation varied by generation. Older participants had established smoking in their early adolescence, whereas the current younger teens had little exposure. Some smoking commenced around high school (from Year 7), and social smoking increased at age 18. Mental and physical health, smoke-free spaces and strong connections to family, community and culture promoted non-smoking. The key themes were (1) drawing strength from culture and community; (2) how the smoking environment shapes attitudes and intentions; (3) non-smoking as a sign of good physical, social and emotional wellbeing; and (4) the importance of individual empowerment and engagement for being smoke-free. Programs promoting good mental health and strengthening cultural and community connections were identified as a priority for prevention.

Estimating population coverage of Tackling Indigenous Smoking teams, a placed-based health intervention in Australia

OBJECTIVE

As part of the Tackling Indigenous Smoking (TIS) program, TIS teams provide Aboriginal and Torres Strait Islander-led tobacco control in their geographic area. We aimed to estimate the percentage and number of Aboriginal and Torres Strait Islander peoples living in an area serviced by a TIS team in 2018-19.

METHODS

We analysed weighted, representative data from 8,048 Aboriginal and Torres Strait Islander people aged ≥10 years from the 2018-19 National Aboriginal and Torres Strait Islander Health Survey. TIS services mapping data were used to define areas served by TIS teams. Coverage was explored in relation to remoteness, program priority groups and sociodemographic characteristics.

RESULTS

Around three-quarters (76.4%,95%CI:72.9-79.9) of the 2018-19 population aged ≥10 years lived in an area served by TIS teams (n=479,000). Coverage by TIS teams was generally similar across groups, with few exceptions.

CONCLUSIONS

The recently announced expansion to national coverage would provide access to locally tailored tobacco control to a further 148,000 Aboriginal and Torres Strait Islander peoples aged ≥10 years, including 46,000 adults who currently smoke.

IMPLICATIONS FOR PUBLIC HEALTH

Expansion to national TIS team coverage is a welcomed first step on the path to ensuring equitable access to tobacco control.

"It Needs a Full-Time Dedicated Person to Do This Job in Our Local Communities with Our Aboriginal Health Services"-Aboriginal and Torres Strait Islander Health Workers and Practitioners Perspectives on Supporting Smoking Cessation during Pregnancy

BACKGROUND

Aboriginal and Torres Strait Islander women deserve improved smoking cessation support. Aboriginal health workers (AHW) and practitioners (AHP) can be central to the provision of culturally safe smoking cessation care (SCC). The objective of this study is to explore attitudes and the perceived role of AHWs/AHPs toward providing SCC to Aboriginal and Torres Strait Islander pregnant women.

METHOD

A mixed-method study using quantitative and qualitative data was conducted among AHW/AHPs in 2021 across Australia. Descriptive and analytical statistics were used to characterise AHWs'/AHPs' attitudes towards SCC and to evaluate the factors associated with perceptions of who is best placed to provide SCC.

RESULTS

From the total AHW/AHP workforce, 21.2% (223) completed the survey. Less than half (48.4%) believed that AHW/AHP were best placed to provide SCC for pregnant women. The majority believed that group-based supports (82.5%) and cultural support programs (63.7%) were the best strategies to support Aboriginal and Torres Strait Islander pregnant women to quit smoking.

CONCLUSION

This study highlights the need to enhance SCC offered to Aboriginal and Torres Strait Islander pregnant women. A targeted workforce dedicated to smoking cessation should be resourced, including funding, standardised training, and ongoing SCC support tailored to Aboriginal and Torres Strait Islander pregnant women.

The Effect of Public Healthcare Expenditure on the Reduction in Mortality Rates Caused by Unhealthy Habits among the Population

The health systems of developed countries aim to reduce the mortality rates of their populations. To this end, they must fight against the unhealthy habits of citizens, such as smoking, excessive alcohol consumption, and sedentarism, since these result in a large number of deaths each year. Our research aims to analyze whether an increase in health resources influences the number of deaths caused by the unhealthy habits of the population. To achieve this objective, a sample containing key indicators of the Spanish health system was analyzed using the partial least squares structural equation modeling (PLS-SEM) method. The results show how increasing public health spending and, thus, the resources allocated to healthcare can curb the adverse effects of the population’s unhealthy habits. These results have important implications for theory and practice, demonstrating the need for adequate investment in the healthcare system to reduce mortality among the population.

Impact of the '10,000 lives' program on Quitline referrals, use and outcomes by demography and Indigenous status

INTRODUCTION

In November 2017, Central Queensland Public Health Unit launched the '10,000 Lives' initiative to reduce smoking prevalence in Central Queensland. The program partnered with local champions and other programs (e.g. 'Deadly Choices') to promote the use of smoking cessation services (e.g. Quitline) in Central Queensland. This study assesses the program's impact on Quitline use by participant demographics and Indigenous status.

METHODS

We compared the number of referred individuals who participated in and completed the Quitline program, and quit smoking during 26-months before (July 2015 to August 2017) and after (November 2017 to December 2019) the '10,000 Lives' launch. We conducted an interrupted time series analysis of monthly referrals to and use of Quitline for Aboriginal and Torres Strait Islander peoples.

RESULTS

Overall, 3207 individuals were referred to Quitline during the 26-months-post-launch compared to 1594 during 26-months-pre-launch period of '10,000 Lives'. The number of referred individuals who completed Quitline program increased by 330.7% and quit smoking by 308.3% in post-launch period. The increase was substantially higher among aged 45+ years, females and Aboriginal and Torres Strait Islander peoples. The result for referrals and use of Quitline was validated by interrupted time series analysis for Aboriginal and Torres Strait Islander peoples.

DISCUSSION AND CONCLUSIONS

The '10,000 Lives' collaborative approach to partner with local champions and targeted smoking cessation programs was effective in increasing the use of Quitline and smoking cessation among all demographic groups, including Aboriginal and Torres Strait Islander peoples. This approach can be used in other regions to address higher smoking prevalence.

E-cigarette use and the relationship to smoking among Aboriginal and Torres Strait Islander and non-Indigenous Australian Secondary Students, 2017

OBJECTIVE

Estimate the prevalence of e-cigarette use (vaping) among Aboriginal and Torres Strait Islander adolescents and explore the relationship between vaping and tobacco use.

METHODS

N=18,199 students aged 12-17 years (n=1,097 Aboriginal and Torres Strait Islander) participating in the 2017 Australian Secondary Students' Alcohol and Drug (ASSAD) Survey self-reported their e-cigarette and lifetime, past month and past week smoking behaviours.

RESULTS

Twenty-two per cent of Aboriginal and Torres Strait Islander students (14% all) reported having ever used e-cigarettes. Significantly greater odds of e-cigarette use among Aboriginal and Torres Strait Islander students was observed overall, but not among regular (past month/week) smokers. There were significant associations between e-cigarette use and any level of smoking for all students (p<0.001), with no variation by Indigenous status. While e-cigarette use was more common among smokers, 28% of Aboriginal and Torres Strait Islander ever-vapers (35% all ever-vapers) were never smokers.

CONCLUSIONS

There is substantial prevalence of e-cigarette ever-use among Australian secondary students, including Aboriginal and Torres Strait Islander students, and a strong relationship with tobacco use.

IMPLICATIONS FOR PUBLIC HEALTH

Policies facilitating e-cigarette access must not undercut tobacco control efforts for adolescents, particularly Aboriginal and Torres Strait Islander people who continue to experience higher smoking rates.

Smoking and quitting characteristics of Aboriginal and Torres Strait Islander women of reproductive age: findings from the Which Way? study

OBJECTIVE

To describe smoking characteristics, quitting behaviour and other factors associated with longest quit attempt and the use of nicotine replacement therapy (NRT) and stop-smoking medication (SSM) in a population of Indigenous Australian women of reproductive age.

DESIGN, SETTING AND PARTICIPANTS

A national cross-sectional survey of Aboriginal and Torres Strait Islander women aged 16-49 years who were smokers or ex-smokers was conducted online during the period July to October 2020.

MAIN OUTCOME MEASURES

Quitting experience: attempt to cut down, time since last quit attempt, longest period without smoking, attempt to cut down during last quit attempt, any use of NRT and/or SSM.

RESULTS

Most of the 428 participating women (302 [70.6%]) reported using an Aboriginal health service. Younger women (16-20-year-olds) smoked fewer cigarettes daily (24/42 [57.1%], 0-5 cigarettes per day), waited longer to smoke after waking (20/42 [47.6%], > 60 minutes after waking), and were categorised as low smoking dependency compared with those aged 35 years and over. One-third of women (153 [35.7%]) had ever used NRT and/or SSM. A greater proportion of older women (35-49-year-olds) had sustained a quit attempt for years (62/149 [45.6%]) and reported trying NRT and/or SSM (78/149 [52.4%]) than women in younger age groups. Quitting suddenly rather than gradually was significantly associated with sustained abstinence (prevalence ratio, 1.27 [95% CI, 1.10-1.48]). Among women who had never used NRT or SSM, most (219/275 [79.6%]) reported reasons for this in the category of attitudes and beliefs. NRT and SSM use was also more likely among women who were confident talking to their doctor about quitting (odds ratio, 2.50 [95% CI, 1.23-5.10]) and those who received most of their information from a health professional (odds ratio, 1.71 [95% CI, 1.11-2.63]).

CONCLUSION

Aboriginal and Torres Strait Islander women want to quit smoking and are making attempts to quit. Quitting suddenly, rather than reducing cigarette consumption, is associated with increased sustained abstinence. Health providers can enable access and uptake of NRT and/or SSM and should recognise that NRT and/or SSM use may change over time. Consistent messaging, frequent offers of smoking cessation support, and access to a range of smoking cessation supports should be provided to Aboriginal and Torres Strait Islander women to enable them to be smoke-free.

Smoking cessation support strategies for Aboriginal and Torres Strait Islander women of reproductive age: findings from the Which Way? study

OBJECTIVE

To identify smoking cessation support strategies that resonate with Aboriginal and Torres Strait Islander women.

DESIGN, SETTING AND PARTICIPANTS

A national cross-sectional survey of Aboriginal and Torres Strait Islander women aged 16-49 years who were smokers or ex-smokers was conducted online during the period July to October 2020.

MAIN OUTCOME MEASURES

Preferred strategies, providers and locations for smoking cessation support.

RESULTS

Among a total of 428 women who participated in the survey, group-based support and holistic support were the most preferred strategies (preferred by 31.8% and 22.2% of women, respectively). Use of an Aboriginal health service was positively associated with choosing holistic support programs (prevalence ratio, 1.14 [95% CI, ≥ 1.00-1.28]). Women with high or moderate nicotine dependency were more likely to consider group-based support to be helpful (prevalence ratio, 1.13 [95% CI, ≥ 1.00-1.27]) than those with low nicotine dependency. The most preferred providers for smoking cessation support were Aboriginal health workers (64.3%). Most women (73.4%) preferred face-to-face support at an Aboriginal health service, 38.8% preferred online support and 34.8% preferred phone support. A higher percentage of older women (≥ 35 years) preferred online or phone support (prevalence ratio, 1.70 [95% CI, 1.03-2.80]) compared with younger women (16-20 years). Use of an Aboriginal health service was positively associated with preference for an Aboriginal health worker (prevalence ratio, 1.35 [95% CI, 1.12-1.62]), and receiving face-to-face support at an Aboriginal health service (prevalence ratio, 1.28 [95% CI, 1.10-1.49]).

CONCLUSION

Aboriginal and Torres Strait Islander women prefer a range of cessation supports, with most women preferring group support and holistic approaches. Cessation supports that resonated with women varied by age, remoteness, nicotine dependence, and whether participants used an Aboriginal health service. Women want support to quit smoking from the Aboriginal health workers at their Aboriginal health service, at their health care providers and in their community. Comprehensive, multifaceted supports are required. Online support and phone-based support are also preferred by some women, which helps to increase accessibility. Appropriate models of care - including sufficient funding for Aboriginal health services and Aboriginal health workers - are required and should be developed in partnership with communities to implement meaningful and culturally safe cessation care. This research demonstrates the need for and importance of multifaceted, comprehensive cessation support strategies.

Getting there together: highlights, challenges and opportunities for tobacco control in the Oceania region

BACKGROUND

The paper focuses on the geographical region of Oceania. We highlight the tobacco control leadership demonstrated in this region and describe the challenges and opportunities to achieving country-specific smoke-free goals.

RESULTS

Significant achievements include smoke-free nation goals, world-leading initiatives such as plain packaging, and a bold plan by New Zealand to reduce the retail availability of smoked tobacco products and remove virtually all the nicotine from cigarettes and rolling tobacco. There are significant challenges and opportunities before reaching smoke-free status including implementation pathways requiring strong governance and leadership and compliance monitoring and enforcement.

CONCLUSIONS

We conclude that achieving a smoke-free Oceania is possible through already existing bold country and regional smoke-free goals, excellent tobacco control leadership, experience and resources, and an understanding of how to work collectively. However, a commitment to focus tobacco control efforts regionally is required to achieve a smoke-free Oceania together.

Tobacco Related Attitudes and Behaviours in Relation to Exposure to the Tackling Indigenous Smoking Program: Evidence from the Mayi Kuwayu Study

Smoking is the leading contributor to the burden of disease and mortality for Aboriginal and Torres Strait Islander peoples, with an estimated 37% of all Aboriginal and Torres Strait Islander deaths attributed to smoking. The Tackling Indigenous Smoking (TIS) program was implemented to support people to quit smoking, prevent initiation, and reduce exposure to second-hand smoke. Analysis of baseline (2018-2020) data from a large-scale cohort study was conducted to quantify smoking-related attitudes and behaviours among Aboriginal and Torres Strait Islander adults, overall and in relation to exposure to the TIS program. Most results were similar for TIS and non-TIS, but there was a significantly lower prevalence of smoking inside households (PR0.85; 95% CI: 0.74, 0.97), smoking ≥21 cigarettes per day (PR0.79; 95% CI: 0.62, <1.00), and smoking a first cigarette within 5 min of waking (PR0.87; 95% CI: 0.76, <1.00) in TIS-funded compared to non-TIS-funded areas. Findings from the analysis highlight encouraging anti-smoking attitudes and behaviours across TIS-funded and non-TIS-funded areas, and serve as a basis for future analysis of change in outcomes over time associated with exposure to a large multi-mode population health program (TIS).

Dose-Response Reduction in Risk of Nasopharyngeal Carcinoma From Smoking Cessation: A Multicenter Case-Control Study in Hong Kong, China

BACKGROUND

Cigarette smoking is associated with nasopharyngeal cancer (NPC) risk. Whether quitting reduces the risk is unclear. We investigated the associations of NPC with duration of and age at quitting in an endemic region.

METHODS

We investigated the associations between NPC and quitting in a multicenter case-control study in Hong Kong with 676 newly diagnosed NPC cases and 1,285 hospital controls between 2014 and 2017, using a computer-assisted self-administered questionnaire. Multivariable unconditional logistic regression yielded adjusted odds ratios (AORs) of NPC by quitting status, duration and age of quitting, combinations of duration and age of quitting, and quitting to smoking duration ratio, compared with current smoking.

RESULTS

Quitting (AOR: 0.72; 95% CI: 0.53-0.98) and never smoking (0.73, 0.56-0.95) were associated with lower NPC risk. NPC risk decreased with (i) longer quitting duration (p < 0.01), reaching significance after 11-20 (0.62, 0.39-0.99) and 21+ years (0.54, 0.31-0.92) of quitting; (ii) younger quitting age (p = 0.01), reaching significance for quitting at <25 years (0.49, 0.24-0.97); and (iii) higher quitting to smoking duration ratio (p < 0.01), reaching significance when the ratio reached 1 (0.60, 0.39-0.93). Quitting younger (age <25) appeared to confer larger reductions (49% for ≤10 years of quitting, 50% for 11+ years) in NPC risk than quitting at older ages (25+) regardless of quitting duration (16% for ≤10 years, 39% for 11+ years).

CONCLUSIONS

We have shown longer duration and younger age of quitting were associated with lower NPC risk, with dose-response relations. Our findings support including smoking as a cause of NPC. Stronger tobacco control measures and quitting services are needed to prevent NPC.

Perspectives about smoking cessation during pregnancy and beyond of Aboriginal women in Australia: A qualitative analysis using the COM-B model

OBJECTIVE

Aboriginal and Torres Strait Islander women (hereafter Aboriginal) and their babies experience poor health outcomes for which smoking is a major risk factor. This paper explores Aboriginal women's perspectives on and experiences of smoking cessation, within and outside pregnancy, and their use of smoking cessation services using the COM-B (Capability, Opportunity, Motivation as determinants of Behaviour) model to understand Aboriginal women's capabilities, opportunities, and motivation for smoking cessation.

METHODS

Data came from 11 focus groups conducted in regional New South Wales, Australia, with 80 women aged between 16 and 68 years. Thematic analysis was performed following the COM-B model.

RESULTS

Seven themes related to capability, opportunity, motivation, and smoking cessation behaviors were identified. The themes highlighted that agency, knowledge, and self-efficacy (as capability), a supportive social environment, and access to culturally appropriate services and resources (as opportunities), together with automatic and reflective motivations for quitting, may enable short- or long-term smoking cessation.

CONCLUSION

Smoking cessation interventions may be more effective if the dynamics of the COM-B factors are considered. Policy and practice changes for further enhancing regional Aboriginal women's psychological capability and supportive social environments, and making smoking cessation services culturally appropriate are warranted.