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Evidence from qualitative studies of youth about the impacts of
tobacco control policy on young people in Europe: a systematic
review.
Authors:
Natalie Papanastasiou, PhD
UK Centre for Tobacco and Alcohol Studies
Usher Institute for Population Health Sciences and Informatics
University of Edinburgh
Edinburgh
UK
Sarah Hill, PhD
Global Public Health Unit
University of Edinburgh
Edinburgh
UK
Amanda Amos, PhD
UK Centre for Tobacco and Alcohol Studies
Usher Institute for Population Health Sciences and Informatics
University of Edinburgh
Edinburgh
UK
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Correspondence to:
Professor Amanda Amos
UK Centre for Tobacco and Alcohol Studies
Usher Institute for Population Health Sciences and Informatics
Teviot Place
EH8 9AG
Edinburgh
UK
Tel: +44(0)131650 3236
Email: [email protected]
Word count: 4219
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ABSTRACT Introduction: A range of tobacco control policies endeavour to prevent
smoking uptake in young people, yet relatively little is known about how
such interventions impact young people’s engagement with smoking. We
reviewed existing qualitative evidence on young people and smoking in
Europe in order to assess whether, in what ways and why young people
comply with, adapt to, resist or circumvent tobacco control policies in
their respective countries..
Methods: We undertook a systematic review of academic literature
presenting qualitative research from Europe on smoking and young
people (11-18 years), published from 2000 - 2015. Bibliographic searches
(PubMed, PsycInfo, SSCI) produced 1357 records, from which 43
relevant papers were assessed for quality and 39 included in the review.
Results: Most studies were from the UK (27), with a small number (one
or two each) from other European countries (Denmark, Sweden,
Switzerland, Belgium, Cyprus, Greece, Hungary, Ireland and Spain). Only
16 articles (11 from UK) provided any evidence about the impacts of
tobacco control policies on young people’s smoking. These focussed on
smoke-free legislation (four), age of sale laws (four), plain packaging
(three), and black market tobacco (one).
Conclusions: There is very little qualitative evidence exploring the
impacts of tobacco control on youth smoking in Europe. To develop more
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effective smoking prevention policies that take account of local political,
social and cultural contexts, more qualitative research from a wider
range of European countries is needed in order to understand how
tobacco control impacts on young people’s social worlds and smoking
behaviours.
IMPLICATIONS
Smoking is the leading cause of premature mortality in Europe. However,
there is little qualitative evidence exploring the impact of tobacco control
policies on young people in Europe. Most comes from the UK and focuses
on a narrow range of policies. Thus we have a limited understanding of
how and in what ways tobacco control policies reach young people, their
engagement with these, and how local context affects their impact. More
qualitative research is needed, from a wider range of countries and on a
broader range of tobacco control policies, in order to strengthen the
evidence-base for reducing youth smoking.
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INTRODUCTION
Smoking is the most important preventable cause of premature death in
Europe (1). While smoking uptake in many countries continues until the
mid-20s, most smokers in Europe start to smoke before the age of 18,
with an estimated three-quarters of smokers in the European Union (2–4)
and two-thirds in the UK thought to start before the age of 18 (5).
Preventing young people from starting to smoke is therefore the most
effective way of decreasing smoking prevalence in future European
generations. This is reflected in the ways many tobacco control policies
are aimed at protecting young people from pro-smoking influences. Such
approaches include reducing young people’s exposure to tobacco
promotion (e.g. banning advertising, sponsorship and point-of-sale
displays; mandatory standardised packaging), reducing the affordability
(e.g. taxation, banning small packs) and availability (e.g. minimum age of
sale) of cigarettes, increasing the awareness of health risks (e.g. media
campaigns, health warnings), and protecting young people from exposure
to secondhand smoke and reducing the social acceptability of smoking
(eg smokefree public places and cars) (6-8). However, countries in
Europe vary considerably in both the extent and implementation of such
policies (9). There are also significant differences between countries in
Europe in youth smoking prevalence and the rates of decline in youth
smoking (10, 11). Understanding the effectiveness or not of tobacco
control policies, and the reasons for this, is instrumental to addressing
smoking as a public health risk in young people.
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Qualitative research, through exploring the lived experience and social
worlds of young people, has provided important insights and
understanding about the role and meaning of smoking in their lives. For
example, qualitative studies have revealed how smoking can play an
important role in peer relationships and socialising (12-16), and in family
relationships where smoking initiation is facilitated by older siblings and
parents (17). For some young people creating a smoking identity has
been found to be an important way of building social and cultural capital
among their peer group, where smoking is used both to project an
identity to distinguish between groups and to build internal group bonds
e.g. through sharing cigarettes (12, 18). In addition, qualitative research
can go further and explore not only how and in what ways tobacco
control policies reach young people through, for example, disrupting
their social worlds and the social meaning of smoking, but also their
responses to and engagement with these effects, both positive and
negative. For example, studies in the UK, US and New Zealand have
facilitated a more nuanced examination of the effect of age of sale laws
on young people’s cigarette sources. These have shown that when retail
access is restricted young smokers identify and target amenable tobacco
retailers, buy cigarettes through intermediaries (i.e. proxy purchases)
and/or access social sources such as friends and family or through social
sales in schools (19-25). Furthermore, these sources are inter-related,
with the social availability of cigarettes contingent on some young people
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buying cigarettes from shops (24). Such studies help understand how
some young smokers are able to circumvent age of sale laws, and the
implications for polices aimed at reducing youth access to cigarettes.
However, as far as we are aware, there has been no review of the
qualitative evidence assessing the impact of tobacco control policies on
how young people engage with smoking - ie. whether, in what ways and
why young people may comply with, adapt to, resist or circumvent such
policies. This paper seeks to address this knowledge gap by presenting
the findings from a systematic review which aimed to explore how
tobacco control policies in Europe shape young people’s engagement
with smoking. Focussing on studies undertaken in countries in Europe
may have particular policy relevance at both the national and EU levels.
Not only is there considerable variation in the strength of tobacco control
policies across Europe (9), but there may be important socioeconomic
and cultural differences, including social norms, which are likely to
influence how young people understand and respond to these policies in
different contexts and countries, and thus their effectiveness. In order
to be as inclusive and comprehensive as possible this review includes
evidence from qualitative studies with young people (aged 11-18) in
Europe relating to smoking perceptions and behaviours published since
2000, whether or not studies explicitly set out to assess the effect of
tobacco control policies. The review is part of a European project
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(SILNE-R http://ensp.org/node/1168 ) which explores the effectiveness of
policies for preventing youth smoking.
METHODS
This review follows the Preferred Reporting Items for Systematic
Reviews and Meta-Analyses (PRISMA) reporting guidelines (see
Supplementary File 1)
Search strategy and study selection
A search strategy was implemented on 17 November 2015 in three
electronic databases, PubMed, PsycInfo and Social Science Citation
Index (SSCI), to identify qualitative research on how young people
engage with smoking. Database specific terms and key words were used
to combine a number of search strings for qualitative, smoking, and
young people (Table 1). Members of SILNE-R were also contacted to
assist with identifying any further studies. The search led to the
production of a database of references which was independently
screened by two of the authors who assessed titles and abstracts to
ensure consistency in the screening process (Figure 1). Any
disagreements were discussed and resolved by all the authors.
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Eligibility criteria
Papers needed to be peer reviewed journal articles based on qualitative
or mixed-methods studies that included primary qualitative data from
young people aged between 11 and 18, and an abstract in English. All
forms of qualitative research methods were included, such as interviews,
focus groups and photovoice. Another criterion was that studies needed
to include a focus on young people’s ‘engagement with smoking’. The
latter was intentionally broad in order to fit with the exploratory aims of
qualitative research and to allow for unexpected findings. This led to the
inclusion of studies that covered topics such as access to cigarettes,
smoking at school, gendered smoking behaviours, and attempts to quit
smoking. Finally, studies needed to be from European countries, as
defined by WHO, and published from the year 2000 onwards in order to
reflect contemporary trends and policy contexts in relation to tobacco
and young people.
Data extraction and quality assessment
In order to appraise the overall quality of the available evidence and
apply a minimum threshold for inclusion in our review, we assessed the
43 eligible studies against a quality evaluation checklist developed by
Hefler and Chapman (26). The checklist included criteria related to the
quality, clarity and justification of articles: title and abstract, introduction
and aims, method and data, sampling, data analysis, ethics and bias,
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results, transferability or generalisability, and implications and
relevance. Quality assessment was conducted for all studies by one
reviewer (NP); a sample of reviewing scores and all exclusions were
checked by another (AA). Studies could receive a maximum score of 36.
Four studies were excluded from the review on the basis of a low quality
assessment score (see Supplementary File 3).
For the 39 studies included in the review, data were extracted by one
reviewer (NP) and checked by another (AA or SH) using a template
adapted from a systematic review of qualitative research on smoking and
pregnancy (27). Information about the research aims, date of fieldwork,
and tobacco control policy context (as noted in the published article) was
recorded. The latter was defined as any information relating to
international, national or local legislation or programmes which aimed to
decrease smoking. In addition, details were extracted on any other policy
contexts which were mentioned in the studies, such as information
relating to national financial crises or political changes.
Data analysis and synthesis
How to synthesise findings from qualitative research is a contested and
evolving field (27-30). The choice of approach is informed by and reflects
not only theoretical and epistemological concerns and orientation, but
also the nature of the studies and data to be synthesised. The studies
included in this review were disparate in terms of their aims, their focus
(or not) on tobacco control polices, the qualitative methods used, and the
way in which the findings were analysed and presented (which ranged
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from in depth interpretative analysis to just lists of quotes with no
accompanying commentary). Therefore, a textual narrative rather than a
thematic approach was taken to analysis and synthesis, in which located
studies are described and similarities and differences between study
findings are highlighted (28, 30). The synthesis of the extracted data, ie
the findings and interpretations of the study authors’, was based on the
type of evidence provided in each article about the direct or indirect
effects of tobacco control policies on young people’s engagement with
smoking (Table 2). Each paper was assigned to one of these categories.
Tobacco control policies were defined as policies that had been
implemented by national or regional jurisdictions – the context described
in each paper is listed in Supplementary File 2.
RESULTS
PsycInfo and SSCI allowed for a composite search of all 12 combinations
of search terms (Table 1) whereas PubMed did not allow for this, leading
to 12 separate search results. The search produced 1357 results across
the three databases (Figure 1). Due to the 12 separate PubMed searches,
there was a very large number of duplicates. An additional two papers
were included following comments from external reviewers. The title and
abstract of these results were screened, and after this exclusion
procedure the full text of 43 articles was assessed for quality and data
extraction.
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Methodological characteristics and quality of included studies
Most articles performed well across the quality criteria with the
exception of the criterion on discussing ethical issues and researcher
bias, in which most articles received a very low score. Several articles
also scored poorly on the sampling criterion because they either did not
describe in detail how the research participants were selected or did not
justify why the participant profile was appropriate for the aims of the
study. The quality assessment and checklist of criteria can be found in
Supplementary File 3. Applying a checklist of criteria to qualitative
research will not reflect an ‘objective’ assessment of quality. Checklists
used in systematic reviews are usually underpinned by positivist
assumptions, such as the value of generalisability or providing clear
recommendations for policy, which are not necessarily compatible with
non-positivist ontological approaches. Many of the articles included here
adopted qualitative methods to explore the complex social worlds of
young people in their situated contexts which necessarily makes their
findings context-specific; any policy recommendations will therefore need
to be appropriately nuanced in their claims. The quality of articles was
thus assessed in such a way that did not penalise studies which did not
adopt a strictly positivist approach. For example, if an article described
its context and participants in detail, giving an in-depth understanding of
the social worlds being explored, it received a high score on
generalisability because readers would understand which other contexts
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the study’s findings might be meaningfully compared to. However, the
quality of four articles was significantly lower than others, and they were
therefore excluded from the review. (These four studies scored
particularly poorly in relation to information given on the selection of
study participants, the approach to data collection and analysis, and
discussion of ethical issues.) One other study received a borderline
quality assessment score, but a decision was made to include this since
the format of the publishing journal was an important contributing factor
(for example, the journal did not include abstracts). The national context
of the 39 remaining studies was: 27 from the UK, two each from Sweden,
Denmark and Switzerland, and one each from Ireland, Belgium, Hungary,
Spain, Greece and Cyprus.
Papers with direct evidence about tobacco policy effects
Eight papers focused on exploring the impact of a particular tobacco
control policy in relation to young people’s engagement with smoking
(classified as ‘direct evidence’ in relation to our research question). Four
of these studies focused on the effectiveness of under-age sales laws in
the UK. One study (22) in Scotland found that young people were able to
circumvent the age of sale law, which was 16 at that time, and that
greater access to retail sources was related to a higher smoking rate in
school pupils. Two studies (20, 31) focused on the effect of increasing the
age of sale in England and Scotland from 16 to 18. Both argued that this
policy was relatively easy to circumvent due to young people having
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multiple alternative sources of cigarettes. One study in Scotland (21)
explored the impact of a ban on proxy sales for under-18 year olds (ie
using an adult to buy cigarettes for an under-18 year old). It found that
proxy sales remained an important source of cigarettes for
disadvantaged young smokers. Three studies explored the potential
impact of plain or standardised packaging and products. One study
conducted in Scotland (32) used mixture of styles of packaging included
a ‘mocked-up’ plain brown pack, found that cigarette pack design can
have a powerful often positive influence on adolescent perceptions and
affective responses. In contrast, plain packaging reduced these perceived
benefits. The authors concluded that they may be effective in reducing
tobacco companies’ ability to communicate to adolescents through pack
design. Similarly, a study conducted in Belgium (33) using a similar
methodology found that plain packs were perceived to be less attractive,
cheap and unreliable. Because of their unattractiveness, young people
were more aware of the health warnings. The authors therefore
suggested that plain packaging could potentially reduce the number of
young people starting to smoke. The third study conducted in Scotland
found that adolescents viewed slim and superslim cigarettes more
positively ie less harmful and more attractive than standard sized
cigarettes (34). Therefore standardising cigarette size and appearance
could reduce the appeal of cigarettes and therefore smoking to
adolescents. Finally, a study examined youth attitudes prior to the
introduction of smoke-free legislation in Greece (35): the authors argued
that cynicism towards the government and cultural attitudes towards
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rebelling against the law contributed to the subsequent ineffectiveness of
the legislation.
Papers with indirect evidence about tobacco policy effects
Eight papers considered the findings of their studies in relation to the
tobacco control policy context in which the study was undertaken
(‘indirect evidence’). One paper explored symbolic values of smoking
amongst young people in Cyprus and suggested that Cypriot culture
being in favour of smoking contributed to the ineffectiveness of tobacco
control policies such as advertising bans and package warning labels
(36). A paper focussing on a disadvantaged community in England
argued that national and regional policies to reduce the prevalence of
illicit tobacco had had a limited impact on communities – including young
people – particularly in the context of a financial recession (37). This was
particularly pronounced in deprived communities where illicit tobacco
trade is a part of the local culture and economy. A study conducted
before the introduction of smoke-free legislation in Scotland revealed the
power of social influences on young people’s attitudes to smoking (38),
and reflected that “it is likely that smoke-free policies in schools,
colleges, universities, workplaces, pubs and bars will be important in
reducing smoking in this age group”. A different paper which drew on
two studies conducted in Scotland highlighted how tobacco and cannabis
use was closely interlinked in young people’s smoking habits (39). The
authors argued that tobacco control policies are less effective when
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young people can easily access cannabis because they continue to smoke
tobacco through mixing it with cannabis. A paper focussing on a study
conducted in Switzerland had similar findings (40). In the context of
several newly-implemented national tobacco control policies, including
smoke-free legislation, young people expressed a desire to quit smoking
tobacco. However, their habit of mixing tobacco with their cannabis
joints meant that they continued to smoke tobacco. One Scottish study
(41) revealed how young people were aware that it was not illegal for
them to smoke. This led to them emphasising their individual right to
smoke and made them more defiant about smoking on school grounds. A
paper which explored young people’s experiences and attitudes towards
smoking in Scotland prior to the introduction of smoke-free legislation
argued that if smoke-free policies were extended to all workplaces
(including colleges, universities, pubs and bars) that this would likely
help prevent older adolescents who are social smokers from becoming
regular smokers as having to go outside to smoke could disrupt the
perceived social role and value of smoking in these contexts (12). Finally,
when reflecting on its qualitative findings, one Scottish study argued that
legislation against smoking in cars would only partially protect young
people but it would help to increase awareness amongst parents that
there is no safe level of secondhand smoke (42).
Papers with very little or no evidence about tobacco policy effects
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The papers in this category fell into one of two groups: those that
included some reference to the policy context but did not relate this to
the study’s empirical material; and those making no mention of the
study’s policy context.
Policy context not related to empirical material
Seven papers were included in this category. One paper applied the
‘attitude, social influence, self-efficacy’ (ASE) model to examine the
smoking behaviours of young people in Denmark (43). It mentioned
Denmark’s 2007 smoking ban in public places, but made no link between
this policy context and the discussion of the data. A paper which explored
the social role of smoking in young people’s everyday lives in England
made reference to the ‘recent smoking ban in public venues’ but did not
relate this policy to the study’s findings (44). A study conducted in
England (18) explored the pathways to smoking in a disadvantaged
community and, although one young person referred to the age of sale
being 18 years, the article did not expand or elaborate on this. A different
paper that explored gendered meanings in smoking among Scottish
young people mentioned the importance of incorporating a gender-
sensitive approach into national prevention strategies (14). However, it
did not directly relate this to the qualitative data or discuss what this
implied for the effect of tobacco control policies on the ways young
people engage with cigarettes. One paper investigated the processes
through which young people started experimenting with cigarettes in
Sweden (45). Despite the paper outlining a number of tobacco control
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policies that had been implemented in Sweden, such as the 1993-4
Tobacco Act that banned smoking on school premises and the 2005
smoking ban in restaurants, bars and cafes, this policy context was not
related to the study’s data. A Scottish study (46) exploring children’s
accounts of family smoking made reference to the existing smoke-free
public places legislation, however this was not discussed in light of the
study’s results. Finally, a study (47) which aimed to explore young
people’s perceptions of smoking in Ireland mentioned a national ban on
smoking in the workplace but did not link this to the findings.
No mention of the policy context
Fourteen papers did not include any mention of the policy context in
which their studies took place and therefore contained no evidence about
how tobacco control policies affect the ways young people engage with
cigarettes (48-61). Indeed, only four of these stated the date when
fieldwork had been conducted (48, 50, 55, 56), underlining the lack of
engagement with policy context in the study design and analysis.
Papers with no substantive evidence about smoking / that
considered smoking only in combination with other drugs
Two papers met our inclusion criteria but had no substantive evidence
about smoking in young people or considered smoking only in
combination with other drug use. One of these papers focussed on young
British Asians’ tobacco and alcohol use in Scotland but its discussion
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made little distinction between smoking and drinking behaviours, and it
made no reference to the policy context (62). Another paper that had
very little evidence about smoking was based on a study in Switzerland
which focused on cannabis users who did not smoke cigarettes (63).
DISCUSSION
This systematic review examined qualitative research published since
2000 exploring the impact of tobacco control policies on young people’s
engagement with smoking in Europe. Only 39 articles of sufficient quality
were identified for inclusion in the review, and only 16 of these provided
direct (8 papers) or indirect (8 papers) evidence about the effect of
tobacco control policies on young people’s engagement with smoking.
The evidence was dominated by British research. Three-quarters of both
the review articles (27 of 39) and the articles providing in/direct evidence
(11 of 16) were based in the UK. Very few other countries (only 10 of the
53 countries in the European Region) were represented in the review via
a relatively small number of studies. This raises concerns about the
transferability of the evidence base to countries in Europe at different
stages of the tobacco epidemic, and with different levels of smoking
prevention policies.
Given the limited number of studies it is difficult to draw any conclusions
about the impact of different types of tobacco control policies on young
people’s engagement with smoking, or to comment on differences
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between countries and/or regions or amongst diverse groups of young
people (e.g. by age, gender, ethnicity, or socioeconomic status).
However, the papers that were identified show that important insights
can been gleaned from qualitative studies about how young people may
conform to, adapt, resist and/or circumvent specific policies. For
example, the four studies from the UK exploring the impacts of laws
aimed at reducing young people’s retail access to cigarettes (20-22, 31)
showed how it is easier to circumvent these laws in disadvantaged areas
where under-18 year olds may more readily find retailers willing to sell
them cigarettes and/or intermediaries willing to make proxy purchases
on their behalf. The importance of wider cultural and social attitudes and
norms was demonstrated when comparing the contrasting views of young
people in Greece and Scotland about national smoke-free public places
legislation, which may help explain the differing levels of compliance in
these countries (12, 35, 38).
These findings highlight the importance of qualitative studies in
understanding the impacts of tobacco control policies on young people,
including the ways in which contextual factors may influence the success
of specific policies. Such factors include the extent to which interventions
are supported by complementary tobacco control measures; social and
cultural norms (at both national and local level); and the broader
economic and political environment. In addition, the three studies on
plain packaging in Scotland and Belgium showed how qualitative
methods can be used creatively to explore the potential impact of new
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tobacco control measures, in this case standardised packs and cigarettes.
Our review also highlights some key areas in which the reporting of
qualitative research can be improved, however. Several potentially
relevant studies had to be excluded on quality grounds due to insufficient
explanation of the sampling strategy via which participants were
identified, the approach to data analysis, and/or an inadequate account of
relevant ethical issues and how the researchers addressed these. The
potential value of some included studies was undermined by a lack of
information on the study context, including specific aspects of the policy
environment (such as the extent of smokefree legislation, age of sale
restrictions) with direct bearing on the interpretation of the results.
These findings highlight the importance of good practice in reporting on
qualitative research (64).
Strengths and weaknesses
We are not aware of any other systematic reviews which have evaluated
qualitative evidence of the effect of tobacco control policies on young
people’s engagement with cigarettes in the European context. Wide
inclusion criteria based on a review by Hefler and Chapman (26) were
used to encompass the broadest range of qualitative evidence on young
people’s engagement with tobacco control policies. However, it is
possible that some papers that analysed qualitative data were not
included because this was not explicitly mentioned in their abstracts. Our
focus on adolescents (11-18 years) means we may have excluded some
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potentially relevant research undertaken in young adults (aged over 18),
such as studies examining the potential impacts of plain packaging (65-
67). Non-English language articles whose title or abstract had not been
translated into English may also have been missed. Only peer-reviewed
journal articles were included in the search. It is possible that grey
literature may contain further evidence on the research question, which
has been excluded from this discussion.
CONCLUSION
Very few qualitative studies have been undertaken in Europe to explore
how young people engage with tobacco control policies, and most of
these are British. We therefore have very little understanding of whether,
in what ways and why young people may comply with, adapt, resist or
circumvent such policies, and the implications for their effectiveness in
reducing the uptake of smoking. Nor do we understand how and why this
engagement may differ by age, gender, ethnicity or socioeconomic status,
or between different countries and contexts. This is an important
omission in the tobacco control literature: we know that smoking uptake
across Europe is increasingly linked to social disadvantage, yet very little
is known about what measures might be effective in reducing this equity
gap (11, 68). There is therefore an urgent need for more qualitative
research which takes into account how the tobacco control policy context
intersects with young people’s social worlds and for analysis which
explores the implications of this research for tobacco control policy
development and implementation.
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SUPPLEMENTARY MATERIAL
Supplementary Files 1, 2 and 3 can be found online at ……..
FUNDING
This study is part of the project ‘Enhancing the effectiveness of programs
and strategies to prevent smoking by adolescents: a realist evaluation
comparing seven European countries (SILNE-R)’, which is funded by the
European Commission, Horizon 2020 – the Framework Programme for
Research and Innovation (2014-2020).
DECLARATION OF INTERESTS
None declared.
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35
Table 1: Electronic database search strategies
Conducted on 17 November 2015.
MEDLINE PubMed & Social Science Citation Index Search Terms
“qualitative” + “smoking” + “young people”
“qualitative” + “smoking” + “youth”
“qualitative” + “smoking” + “adolescent”
“qualitative” + “smoking” + “young adult”
“qualitative” + “smoking” + “children”
“qualitative” + “smoking” + “teenagers”
“qualitative” + “tobacco” + “young people”
“qualitative” + “tobacco” + “youth”
“qualitative” + “tobacco” + “adolescent”
“qualitative” + “tobacco” + “young adult”
“qualitative” + “tobacco” + “children”
“qualitative” + “tobacco” + “teenagers”
PsycINFO Thesaurus and Search Terms
Thesaurus terms: qualitative research, tobacco smoking, adolescent
attitudes
Search terms (note:.sh [subject heading] .ti[title] .ab [abstract])
Qualitative research.sh OR qualitative.ti OR qualitative.ab
Tobacco smoking.sh OR tobacco.ti OR tobacco.ab OR smoking.ti
OR smoking.ab
Adolescent attitudes.sh OR adolescent.ti OR adolescent.ab OR
36
young people.ti OR young people.ab OR youth.ti OR youth.ab OR
young adult.ti OR young adult.ab OR children.ti OR children.ab
OR teenagers.ti OR teenagers.ab
Table 2: Type of evidence about the effect of national and/or regional tobacco control policies
Papers with direct evidence: papers which explored the
effectiveness of a specific tobacco control policy in relation to
young people’s engagement with smoking.
Papers with indirect evidence: papers which related the
study’s qualitative findings to the tobacco control policy context
in which the study was undertaken.
Papers with very little or no evidence: papers which either
mentioned the tobacco control policy context of the study but
did not link it to the research findings or papers which made no
mention of the tobacco control policy context – both types
provided no evidence for the research question.
Papers with no substantive evidence about smoking / that
considered smoking only in combination with other drugs:
papers which provided no evidence for the research question
37
Figure 1: PRISMA flow diagram
* We accepted one paper with a borderline score (24) because the style of the publishing journal contributed to the low score (for example, the journal that didn’t use an abstract - which accounts for 2 points in the quality assessment score).
38
# Records identified through database
searching (PubMed, PSYCInfo, and SSCI)
N = 1357
# Records screened on basis of title /abstract and, if necessary, full
text.N = 1363
Records excluded due to data not being qualitative, no focus on smoking, article published before 2000, participants not 11-18 years old, primary data not from young people, data from other age ranges
merged with 11-18-year-old participant data, duplicate articles.
N = 1211
# Records full text assessed for quality appraisal
N = 43
Records excluded as scored below 24 on quality appraisal*
N = 4
# Records screened to identify European studies
N= 152
Records excluded as country of study non-EuropeanN = 110
# Records includedN = 39
# Records identified
through other sources
N = 6