The effects of interventions targeting multiple health behaviors on smoking cessation outcomes: a rapid realist review protocol
Systematic Reviews volume 7, Article number: 38 (2018)
Health behaviors directly impact the health of individuals, and populations. Since individuals tend to engage in multiple unhealthy behaviors such as smoking, excessive alcohol use, physical inactivity, and eating an unhealthy diet simultaneously, many large community-based interventions have been implemented to reduce the burden of disease through the modification of multiple health behaviors. Smoking cessation can be particularly challenging as the odds of becoming dependent on nicotine increase with every unhealthy behavior a smoker exhibits. This paper presents a protocol for a rapid realist review which aims to identify factors associated with effectively changing tobacco use and target two or more additional unhealthy behaviors.
An electronic literature search will be conducted using the following bibliographic databases: MEDLINE, Embase, PsycINFO, Cumulative Index to Nursing and Allied Health Literature (CINAHL), The Cochrane Library, Social Science Abstracts, Social Work Abstracts, and Web of Science. Two reviewers will screen titles and abstracts for relevant research, and the selected full papers will be used to extract data and assess the quality of evidence. Throughout this process, the rapid realist approach proposed by Saul et al., 2013 will be used to refine our initial program theory and identify contextual factors and mechanisms that are associated with successful multiple health behavior change.
This review will provide evidence-based research on the context and mechanisms that may drive the success or failure of interventions designed to support multiple health behavior change. This information will be used to guide curriculum and program development for a government funded project on improving smoking cessation by addressing multiple health behaviors in people in Canada.
Systematic review registration
Major chronic diseases, including cardiovascular diseases (CVDs), cancer, chronic respiratory diseases and diabetes, are the cause of 65% of all deaths in Canada each year . Non-compliance with existing guidelines for tobacco use, physical activity, nutrition, and alcohol consumption account for nearly 50% of deaths and a life expectancy that is 17.9 years shorter compared to Canadians that practice healthy behaviors  and impose substantial and unnecessary economic strain to the healthcare system. In 2013, it was estimated that $9.6 billion in healthcare costs were attributable to newly diagnosed cancers that were preventable had Canadians adhered to recommendations for various health behaviors . Considering that 22–93% of the Canadian population participate in multiple unhealthy behaviors [4,5,6], it is essential to continue to develop and implement large-scale population based interventions that focus on changing multiple health behaviors.
Tobacco use has a substantial impact on life expectancy, especially across specific demographic groups . Therefore, interventions that are designed to focus on adopting and maintaining smoking cessation could be advantageous. Evidence suggests that unhealthy behaviors tend to cluster with tobacco use [7,8,9]. Engaging in these additional unhealthy behaviors can influence tobacco use as well as nicotine dependence [10, 11]. Thus, smoking cessation can prove to be increasingly challenging as the odds of becoming dependent upon nicotine increase by 23% for every unhealthy behavior a smoker exhibits . Furthermore, studies have shown that reductions in tobacco use are significantly associated with participating in physical activity and lowering alcohol consumption [12,13,14,15]. For these reasons, interventions that attempt to change multiple health behaviors concurrent with smoking cessation could be beneficial.
Large community-based programs and interventions including the Multiple Risk Factor Intervention Trial (MRFIT), North Karelia Project, Pawtucket Heart Health Program, Stanford Five-City Project, Minnesota Heart Health Program, and the Mediterranean Lifestyle Program were developed and implemented to decrease the risk of coronary heart disease (CHD) mortality through the simultaneous reduction of multiple health behaviors such as tobacco use, unhealthy diet, and a lack of physical activity [16,17,18,19,20,21,22]. More recently, Project PREVENT was designed to reduce behavioral risk factors for colorectal cancer and the BETTER Trial aimed to improve the primary prevention of chronic diseases and the lifestyle factors associated with these diseases [16, 23].
Based upon theories for behavior change, these comprehensive interventions involved changing multiple behaviors through community-based interventions and health education strategies. Programs and interventions are often complex, and the outcomes can vary depending on individual, social, and environmental factors such as location, culture, available resources and population profile. Often, multi-level contextual factors and mechanisms pertaining to the development and implementation of successful behavioral change interventions are not fully understood. A realist review aims to narrow this gap by using a theory-based explanatory approach to explain complex interventions and to attempt to understand for whom, how, and under which circumstances the interventions are successful .
The purpose of this rapid realist review is to identify the factors associated with effectively reducing tobacco use as well as two or more additional unhealthy behaviors. We chose to evaluate interventions that endeavor to change three behaviors or more based on previous large-scale population-based interventions [16, 17, 25]. The information gathered from this realist review will provide evidence-based research to guide the curriculum and program development for Picking up the PACE (Promoting and Accelerating Change through Empowerment): Expanding Tobacco Cessation Training Curriculum to Promote Integrated Chronic Disease Prevention, a recently funded project by PHAC (PHAC grant #1617-HQ-000045). Developed with our expert panel, our specific research question is ‘What factors are associated with effective multiple health behavior change (three or more, including smoking)?’ In this protocol, we outline our initial program theory and describe the specific steps that will be undertaken to answer this question.
Realist synthesis has its roots in realism, a philosophy situated between positivism (the belief that there is a real world out there that can be observed) and constructivism (the belief that reality is socially constructed and thus cannot be observed). Realists believe that reality can be stratified in events that can be observed, as well as the un-observable, and the context specific mechanisms behind them. Thus, when using a realist approach for evaluations, or synthesis, there is an assumption that there are many dimensions and layers that could explain any complex intervention. A realist review does not seek to explain all these layers; instead, it focuses on patterns between contexts and mechanisms, which create preconditions for particular behavioral outcomes .
The goal of realist synthesis is to understand how complex interventions work, or why they fail, in specific contexts and settings. ‘Theories’ rather than ‘programs’ are the unit of analysis . Realist reviews propose that this is best accomplished by understanding the context-mechanism-outcome (C-M-O configurations) . Context refers to social, cultural, historical, and institutional norms in which the program is introduced . Mechanisms can be described as “agents of change”  and include the beliefs, values, desires, and cognitive or emotional reasoning of participants and stakeholders who receive or deliver the intervention. They describe how the resources and activities embedded within an intervention influence the reasoning and ultimately the behavior of its participants . The mechanisms are usually not directly observable or measurable [29, 30]. Outcomes are the expected or unexpected products of the interaction between mechanisms and context .
Realist reviews, as originally described by Pawson et al. , require considerable and sustained investment over time, which does not always suit the time-sensitive demands of many intervention or policy decisions. Recently, a ‘Rapid Realist Review’ methodology (RRR) has been developed as a tool for applying a realist approach to a knowledge synthesis process and producing a product that is useful in responding to time-sensitive issues with limited resources .
1. Clarifying the scope and articulating the preliminary program theory.
We conducted a preliminary review to summarize the different possible theories and refine the research question. To determine the initial scope of this project, some of the published evidence from seven large-scale multi-factorial cardiovascular disease (CVD) and cancer risk factor interventions [16, 18, 21, 23, 33,34,35] were reviewed and the following data was extracted and summarized: study characteristics (year, population, sample size, setting, and type of intervention or program); design of the study; any explicit reference to a theory underlying the intervention; and any theoretical description linking context (C), mechanism (M) of change, and outcome (O) . This dataset is available upon request. From this preliminary review, themes regarding the contexts, activities, mechanisms, and outcomes incorporated within effective multiple health behavior change (MHBC) interventions began to emerge. In some cases, the mechanisms of change were not explicitly mentioned but could be inferred from the article. Our expert panel reviewed the results of the mapping exercise and assisted the research team in developing the preliminary program theory using concepts from the Behavior Change Wheel , a theory-driven method for characterizing and designing behavior change interventions (Fig. 1). The expert panel had a total of 11 members and was comprised of representatives from the Centre for Addiction and Mental Health, Medical Psychiatry Alliance, and Public Health Ontario. They were engaged through in-person meetings and via email and were asked to share their expertise and provide feedback as it relates to chronic disease risk factors and integrated chronic disease prevention. The panel met 9 times in-person over a period of 6 months.
Two important contextual factors arose from this preliminary review: the importance of infrastructure and determining the appropriate regions to target when implementing MHBC interventions.
Having an existing multi-disciplinary infrastructure (e.g., access to nurses, dietitians) that the MHBC intervention can leverage [15, 24, 26, 27] and a geographical region where population level data showed there was a health problem that could be improved with behavior changes [16, 23, 33, 35] were shown to be an important part of the intervention design.
Mechanism and key components of the interventions
Several studies targeted not only the individuals but also the surrounding community and/or organizational structures through the integration of healthcare services, involvement of community leaders and schools, and modeling by peers and opinion leaders [21, 23, 33, 37]. This multi-level approach to intervening within the community appears to be in an effort to change the physical and social opportunities that can help facilitate MHBC in individuals. The preliminary mechanisms of change could be that by intervening with the community, the intervention improves feelings of support by participants and changes the social climate regarding multiple health behaviors (MHBs). Moreover, a few MHBC programs were coupled with mass media campaigns such as education, risk-messaging, and study information [21, 33, 34]. The mechanism of change for these mass media interventions was to provoke resolution of cognitive dissonance by combining fear-inducing messages with clear attainable recommendations for how to change the risk behavior .
At the individual level, several mechanisms of change were identified. These included increasing participants awareness of the problem and how to change the behavior through educational group presentations and health practitioner advice [21, 23, 33, 35, 37], and increasing participants’ feeling of being supported [35, 37] and empowered through counseling techniques such as motivational interviewing, goal-setting, and shared decision making [21, 23, 37]. Providing financial incentives was another way some interventions encouraged behavior change [21, 34].
Another key emerging theme within these studies is that the intervention was delivered over several sessions [21, 33, 35, 37]. Of the large-scale interventions reviewed to date, the BETTER Trial was the only study in which the individual-level intervention was a single 1-h session . For studies in which the intervention spanned several sessions, tailored messages and feedback appeared to be an important component in the monitoring and reinforcement of MHBC [16, 21, 37].
The design of these interventions was primarily guided by four theoretical frameworks including the social learning theory [21, 34], social cognitive theory [16, 35], theories for community organization [21, 33, 34], and a theory of behavior change [33, 37].
Since MHBC interventions involve the simultaneous or concurrent change of health behaviors, the effect of individual interventions on mortality and morbidity need to be measured long term. For example, the MRFIT was initially designated a failure after 7 years when it failed to show a reduction in CHD mortality rates in the intervention group [25, 38]. However, since the completion of the trial, the long-term efficacy of the MRFIT cohort has been assessed at multiple follow-up periods with numerous studies demonstrating a decrease in CHD mortality [18, 39,40,41]. Thus, when measuring the outcomes of an intervention, it is important to consider factors such as loss to follow-up, adherence to the program, and follow-up periods to accurately detect differences in outcomes. Furthermore, MHBC program outcomes have been traditionally reported on each individual health behavior separately, which may lead to a diversity of different outcomes that undermines the conceptualization of an overall impact . In recent years, more studies that intervene on multiple health behaviors, such as the BETTER trial, adopt a composite outcome measure that conveys a summary of changes made in multiple domains .
Any important protocol amendments will be fully documented in the methods section of the final paper.
2. Searching for relevant evidence.
To test the program theory identified in step one, a search strategy will be implemented to retrieve relevant data from both published and grey literature. The search strategy will be developed by the research team in collaboration with a medical librarian, who will execute the search in multiple databases. A draft of the search strategy for MEDLINE can be found in Additional file 1.
The initial search will aim to identify as many multiple health behavior interventions as is possible, allowing the team to most accurately identify the trends which will inform later search iterations. Due to variation in the ways in which researchers write about such interventions, the initial search strategy will use a systematic approach to cast a wide net. Later search iterations may not be systematic or comprehensive, as is the convention in realist reviews [24, 29] .
The following bibliographic databases will be searched for peer reviewed literature: MEDLINE; EMBASE; PsycINFO; Cumulative Index to Nursing and Allied Health Literature (CINAHL); The Cochrane Library; Web of Science; Social Sciences Abstracts; and Social Work Abstracts. The strategy will include database-appropriate subject headings, as well as “keywords” in natural language. Search terms will include the following: alcohol, tobacco, sleep, physical activity, nutrition, stress, intervention, treatment, programs, and related terms. Terms and concepts will be combined using Boolean logic and operators including proximity searching. The strategy will not be limited by study design, in keeping with standards for this review type . Apart from published articles from the seven large-scale multi-factorial cardiovascular disease (CVD) and cancer risk factor interventions [16, 18, 21, 23, 33,34,35] we have started reviewing, the search will be limited to articles published in English, from January 2005 to the present.
To identify grey literature from Canada, Europe, and the USA not already captured, the following websites and online repositories will be searched: Health Canada; Canadian Public Policy Collection; Clinicaltrials.gov; Clinicaltrialsregister.eu; Grey Literature Report; the Campbell Collaboration Library; and DesLibris. Reference lists of chosen articles and documents will also be hand searched in order to identify any relevant resources not captured by the systematic searches.
The systematic review software DistillerSR  will be used to assess the relevance of each study by two independent reviewers using a pre-designed relevance screening form (Additional file 2). Any disagreements will be discussed by a third reviewer of the author’s team until a consensus is reached.
Following a realist approach, it is possible that after developing the C-M-O configurations, knowledge users and the research team may modify these criteria.
3. Data extraction
As in most realist reviews, the data extraction phase will occur in an iterative manner, allowing for new mechanisms to emerge at any time. A pre-designed data extraction form (Additional file 3) will be used by two independent reviewers to extract relevant information for each study using DistillerSR . Two reviewers will independently extract data from the included studies. Any discrepancies between the reviewers will be resolved by consensus or a third reviewer where applicable. If deemed necessary, articles may be analyzed in NVivo . A spreadsheet will be maintained with all articles that are to be included. Two researchers will identify recurrent themes within mechanisms and group to ascertain emerging patterns of C-M-Os. The researchers will infer from the data in the included documents what might be functioning as mechanisms. They will identify recurrent patterns in the data that relate to these mechanisms and develop C-M-O configurations for them. The researchers will then look for data from across all included documents to confirm, dismiss, or refocus these CMO configurations. If the articles included provide a description of their participants, we will use the PROGRESS (Place of residence, Race/ethnicity/culture/language, Occupation, Gender/sex, Religion, Education, Socioeconomic status, and Social capital) framework to ensure that we are using an equity lens in our review process .
4. Appraising the quality of the evidence
A combination of the Mixed Methods Appraisal Tool (MMAT)  and the Critical Appraisal Skills Programme (CASP)  will be used to appraise the articles generated through the search. The MMAT has been validated to concurrently appraise the methodological quality of qualitative, quantitative, and mixed methods studies . It contains 19 methodological quality criteria to assess the quality of five different types of studies including qualitative research, randomized controlled trials, non-randomized studies, quantitative descriptive studies, and mixed methods studies. These criteria are scored on a nominal scale (Yes/No/Can’t Tell), and an overall quality score can be ascertained using this tool for each included study. Additional criteria from CASP were added to account for reporting and attrition bias, relevance and transferability, and ethical considerations. Given that an overall quality score may not be informative, we may also create a descriptive summary using MMAT and CASP criteria. Using the pre-designed quality assessment form (Additional file 3), two reviewers will appraise the quality of the evidence from each study independently using DistillerSR . During this appraisal stage, conflicts between reviewers will be resolved by consensus or a third reviewer where applicable.
The overall quality of the evidence will be reported to understand the validity of the included studies as a whole. When drawing conclusions from the completed dataset, the reviewers will also briefly report on the quality of evidence of the particular studies where applicable.
5. Data synthesis
Findings from the literature review will form the basis for producing a final report which will provide answers to the following questions: (1) which factors are effective in MHBC; (2) where are these interventions effective; and (3) for whom are these interventions effective. In addition, the study team will refine the program theory to advance our current understanding on how MHBC interventions work in different contexts.
By extracting the data we collect in DistillerSR, we will construct a matrix using Excel or NVIVO 11 to collate information for each study on the following (Additional file 4):
Health behaviors the intervention attempted to change
Whether they tried to change the behaviors simultaneously or sequentially
Context they operated in
Mechanisms of change postulated or assumed by the study’s authors to explain the success or failure of the intervention
Outcomes for each change behavior
Quality assessment score
We will examine the interaction between context, mechanism, and outcome and see how these map to our initial program theory. Studies with high-quality assessment score will be used to confirm, dismiss, or refocus the C-M-O configuration. Studies with a low quality assessment score will only be used to confirm an established C-M-O configuration, but not to modify it. We will have several meetings with our expert panel to discuss preliminary analysis and conclusions; thus, the synthesis will be derived from a negotiation between experts and reviewers.
A draft report will be disseminated to expert panel participants for input, using the RAMESES (Realist and Meta-narrative Evidence Syntheses: Evolving Standards) publication standards . Members of the expert panel include representatives from provincial and national organizations who are experts in tobacco cessation and/or chronic disease risk factors, patients, professional associations, and public health. The report will include suggestions and recommendations in accordance with the quality and quantity of available evidence with regard to:
What interventions should be implemented to reduce multiple health risk behaviors?
What settings are best suited to implement these interventions?
Which of these interventions will produce the biggest impact on smoking cessation rates and reducing other risk behaviors?
The realist review aims to follow internationally recognized procedures and will be reported in accordance with the PRISMA guidelines where applicable  as shown in the PRISMA-P checklist (Additional file 5).
6. Knowledge translation—recommendations and a plan for dissemination
An advisory committee consisting of 23 members including decision makers, researchers, physicians, and patients will develop a knowledge translation (KT) plan, which will include an integrated and interactive approach to inform the development of a curriculum to train health care practitioners (HCP) in how to address MHBs and later on the implementation of a scalable MHBC program in primary care clinics. Although the KT plan will focus on primary care sites across Canada, we will also develop a dissemination plan to share the findings with communities, municipalities, and other sectors of government who are working on similar initiatives.
We developed a realist review protocol to understand the multi-level mechanisms that may drive the success or failure of programs designed to support MHBC. The goal of the realist review is to provide important information regarding the mechanisms and contexts that explain the success or failure of interventions. This will be used to develop an online training and guidance tool for implementation into primary care, which will help support the delivery of MHBC interventions to clients. However, several potential limitations merit emphasis. First, research studies are generally not generated to be read with a realist lens and it is therefore possible that many studies will not report contextual or implementation factors. Publication bias is also possible, in that only studies reporting successful interventions might be reported. Both these gaps might be addressed in a later stage, by contacting authors and experts; once the rapid review is finalized, and a more thorough review is done. The final limitation is achieving a balance between a comprehensive review and a timely one. Bi-weekly the researchers will meet with the expert panel, to facilitate quick decision making with regards to identifying C-M-O configurations and helping create effective and useful categories, given the data retrieved from the articles.
Building on Existing Tools to Improve Chronic Disease Prevention and Screening in Family Practice
- CAMH :
Centre for Addiction and Mental Health
- CASP :
Critical Appraisal Skills Programme
- CHD :
Coronary heart disease
- CINAHL :
Cumulative Index to Nursing and Allied Health Literature
- C-M-O :
- CVD :
- DARE :
Database of Abstracts of Reviews of Effects
- ERIC :
Educational Resources Information Centre
- HCP :
Health care practitioners
- MHB :
Multiple health behavior
- MHBC :
Multiple health behavior change
- MMAT :
The Mixed Methods Appraisal Tool
- MRFIT :
The Multiple Risk Factor Intervention Trial
- PROGRESS :
Place of residence, Race/ethnicity/culture/language, Occupation, Gender/sex, Religion, Education, Socioeconomic status, and Social capital
- RAMESES :
Realist and Meta-narrative Evidence Syntheses: Evolving Standards
- RRR :
Rapid realist review
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Dr. Selby acknowledges the support he receives from the Clinician Scientist Program the Department of Family and Community Medicine, University of Toronto.
This project is supported by funds from the Public Health Agency of Canada (PS—PI) and the Medical Psychiatry Alliance (VT). The views do not reflect those of the funders.
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Appendix 1- Search Strategy. (DOC 31 kb)
Appendix 2 – Relevance Screening Form. (DOCX 15 kb)
Appendix 3 - Quality Assessment and Data Extraction Form. (DOCX 46 kb)
Excel spreadseet. (XLSX 21 kb)
PRISMA-P 2015 Checklist. (DOCX 37 kb)
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Minian, N., deRuiter, W.K., Lingam, M. et al. The effects of interventions targeting multiple health behaviors on smoking cessation outcomes: a rapid realist review protocol. Syst Rev 7, 38 (2018). https://doi.org/10.1186/s13643-018-0702-0