Nothing so practical as theory: a rapid review of the use of behaviour change theory in family planning interventions involving men and boys

Abstract

Background

There is growing recognition of the need for interventions that effectively involve men and boys to promote family planning behaviours. Evidence suggests that the most effective behavioural interventions in this field are founded on theoretical principles of behaviour change and gender equality. However, there are few evidence syntheses on how theoretical approaches are applied in this context that might guide best practice in intervention development. This review addresses this gap by examining the application and reporting of theories of behaviour change used by family planning interventions involving men and boys.

Methods

We adopted a systematic rapid review approach, scoping findings of a previously reported evidence and gap map of intervention reviews (covering 2007–2018) and supplementing this with searches of academic databases and grey literature for reviews and additional studies published between 2007 and 2020. Studies were eligible for inclusion if their title, abstract or keywords referred to a psychosocial or behavioural intervention targeting family planning behaviours, involved males in delivery, and detailed their use of an intervention theory of change.

Results

From 941 non-duplicate records identified, 63 were eligible for inclusion. Most records referenced interventions taking place in low- and middle-income countries (65%). There was a range of intervention theories of change reported, typically targeting individual-level behaviours and sometimes comprising several behaviour change theories and strategies. The most commonly identified theories were Social Cognitive Theory, Social Learning Theory, the Theory of Planned Behaviour, and the Information-Motivation-Behaviour Skills (IMB) Model. A minority of records explicitly detailed gender-informed elements within their theory of change.

Conclusion

Our findings highlight the range of prevailing theories of change used for family planning interventions involving men and boys, and the considerable variability in their reporting. Programmers and policy makers would be best served by unified reporting and testing of intervention theories of change. There remains a need for consistent reporting of these to better understand how complex interventions that seek to involve men and boys in family planning may lead to behaviour change.

Plain language summary

Family planning (FP) programmes aim to enable people to achieve their desired family size. Successful programmes are essential for encouraging better health outcomes for individuals and families. Historically, FP programmes have focused on the sexual and reproductive health and rights of women and girls, and while this is necessary, it has also contributed to the exclusion of men and boys from FP programmes. There is growing evidence to suggest, however, that involving men and boys in FP may increase its uptake and improve health outcomes for all. However, we still know relatively little about the best ways to involve men and boys in FP programmes in order to ensure success. Research is ongoing to rectify this.

When we look at public health behaviour change programmes in general, we find that many successful programmes incorporate theories of behaviour change into their design. These theories guide the kinds of activities and materials that the programme employs in order to promote behaviour change. In the field of FP, there is little information about the kinds of behaviour change theories that might be used to design programmes. This review aimed to address this by reviewing the global literature on FP programmes that involved men and boys to identify relevant behaviour-change theories. We found a range of theories that will be of use to programme planners. We also found, however, that there was lots of variability in the way theories were reported. We make recommendations for how this problem might be resolved.

Background

Family planning (FP) interventions aim to provide information and skills to enable individuals to achieve their desired family size and effectively plan the timing of births. This is essential to achieving reproductive health and rights for women and families [1]. Ensuring effective FP and uptake of FP interventions is a public health concern, not least in low- and middle-income countries (LMICs) where unmet need for family planning is high. It is argued that the promotion of FP and Sexual and Reproductive Health and Rights (SRHR) together is central to advancing individual wellbeing and to socioeconomic development [2].

The 1994 International Conference on Population and Development called for greater male involvement in FP and SRHR [3]. Since then, programmers and national strategies have sought to do this by widening provision, tailoring and adapting programmes, and encouraging male participation. Despite this progress, it remains that the role of men is often relegated to that of supporting their female partners in FP decision-making, rather than also being active users of FP methods themselves [4]. Men and boys are still underserved and under-involved in FP programming even though there is increasing evidence that they can play a key role in FP intervention effectiveness, increasing uptake of FP, and enabling maternal SRHR [4, 5].

A key part of effective design in FP intervention is the application of a theory of behaviour change to guide development [6]. A ‘theory of change’ is a mechanistic description of causal determinants, in other words, a theoretical depiction of how an intervention is intended to lead to change in a specified outcome [6]. Generally, theories of change are based on established behaviour change theories and they usually detail how programme components are expected to lead to change. Theories of change may encompass psychosocial determinants of behaviour, positing how environmental and programme inputs lead to output behaviours via individual, interpersonal, and structural processes. Well known examples of this are the Theory of Planned Behaviour [7] and Social Learning Theory [8]. Such theories provide a framework to understand how influencing knowledge, skills, attitudes, and environmental factors may lead to the desired behaviour change. In the field of SRHR, gender norms and masculinities are likewise recognised as important theoretical factors influencing a wide range of SRHR behaviours and outcomes [9]. Reflecting this, there have been calls from policy makers and statutory agencies to better integrate gender norms in interventions in contemporary SRHR strategies [10, 11]. Despite these calls and tentative indications of positive effects, evidence suggests that the application of gender-transformative principles and strategies is not yet widely applied [12, 13].

Notwithstanding the importance of effective and evidence-based FP intervention, the theoretical grounding and processes of complex interventions relating to FP remain underinvestigated in systematic reviews [14]. There is a lack of cohesive literature on the commonly applied frameworks within interventions in this area, particularly those involving men and boys. A previously conducted review of theory-based interventions found that Social Cognitive Theory was the most frequently used in interventions to promote contraceptive use, often in conjunction with another model of behaviour change [14, 15]. That review, and others in the field, however, focus largely on female use of contraceptives or do not parse interventions based on participant gender or sex. The review reported here addresses this gap, asking a more specific research question that will provide pragmatic information for those wishing to develop interventions that effectively involve men and boys in FP: What theories of change have been used to inform FP interventions involving with men and boys?

Methods

Design

This paper presents a synthesis based on a Rapid Review, an approach to data acquisition that employs a systematic but restricted approach to the capture and analysis of literature [16]. Most commonly, rapid reviews are limited in their methods and scope to aid more timely synthesis for instance by searching only peer-reviewed literature and extracting only very specific information from studies [17]. Initial evidence suggests that their results largely coincide with those of full systematic reviews of the same topic while offering more timely completion [16].

Systematic evidence reviews typically focus on examining the outcome effectiveness of interventions [18]. A contrasting approach to this is that of a Realist Review. This approach attempts to synthesise the theoretical and empirical evidence to understand “what works for whom, in what circumstances, in what respects and how” [18]. As the goal of this review was to identify the context and use of theories of change, the data analysis and synthesis draws on the Realist approach.

More information on the review design and methodology is available in the review protocol [19]. This rapid review was conducted as part of an ongoing systematic review that aims to identify the effective components and characteristics of interventions involving men and boys in LMICs in family planning [20].

Inclusion and exclusion criteria

Records were eligible for inclusion if their title, abstract or keywords referred to FP intervention(s), targeted psychosocial or behaviour FP outcomes, mentioned use of a theory of change, and involved males in the intervention. As this review aimed to obtain a broad overview of the use of theories of change no limits were applied in terms of study design, therefore, intervention design papers, evaluations, protocols, and reviews were all eligible for inclusion. Similarly, eligible interventions were limited only to psycho-social or behavioural designs encouraging capacity or engagement with FP. Records related exclusively to biomedical interventions and outcomes (e.g. evaluating surgical procedures, investigating fertility rate following vasectomy) were not within the scope of this review and therefore excluded.

Search strategy

We identified studies in two ways. First, we screened all the reviews included within a comprehensive Evidence and Gap Map (EGM) and systematic review of reviews which the authors were involved in and is freely available online [12]. The EGM contained reviews interventions reporting a range of SRHR outcomes for men and boys published between 2007 and 2018 [12]. Second, we searched academic databases and grey literature sources for reviews, articles, and protocol documents published between 01 January 2007 and 05 May 2020 (the date of searches). Searches for academic literature were limited to title, abstract and keywords, and conducted using the following databases: PubMed, CINAHL, PsychINFO, and the Cochrane Library (including CENTRAL). Potentially relevant grey literature was identified using abridged versions of the search terms used for the academic searches in Google and Google Scholar. After sorting by relevance, the first five pages of records returned in each grey literature source were screened.

Search terms were prepared based on those used by the previously cited EGM [12, 21] and adapted according to the specific goals of this review. We combined terms for FP, men and boys, intervention and theory using the AND operator, see Appendix 1 for full list of terms.

Record screening was carried out by one author (MR) by title only to remove obviously irrelevant records e.g. those that clearly did not relate to a psychosocial intervention, involve males, or did not describe a theory of behaviour change. A random sample comprising 10% of excluded records was checked by a second author (ÁA) for quality control. Restricting verification of a subset of records is recognised in Rapid Review methodology [16, 22]. While full dual screening is preferable, guidelines indicate screening training using a limited set of records as low as 10–20% may be sufficient to ensure consistent decisions are made [23].

The first 100 titles and abstracts were double screened independently by two authors (MR and ÁA) against our inclusion criteria [19]. Studies were excluded if they related only to a biomedical FP intervention or outcomes (e.g. sperm viability after biomedical intervention). Any disagreement was resolved through discussion and this double screening was repeated a second time, at which point we were satisfied that it was sufficient for one author to single screen all remaining records. A random sample of 10% of included records were likewise checked by a second reviewer (ÁA) to maintain screening quality.

Full text screening and data extraction of the first five records was conducted by two authors (MR and ÁA) independently. Disagreements were once again resolved through discussion until authors were satisfied that one author (MR) could complete the remaining data extraction alone.

Search procedure

Reviews within the EGM were considered independent records for the purposes of this review. Review of titles and abstracts of items in the EGM showed that most of the included 145 records related to FP programmes were medical interventions (n = 79) and therefore not relevant for the present review. The remaining 66 full text records were screened to determine if they included details of intervention theory of change. In total 46 (70%) of these systematic reviews did not detail the use of behaviour change theory and were excluded, the remaining 20 systematic reviews (30%) were included in the review.

Of the 796 non-duplicate records identified from our separate academic database and grey literature search, 666 were excluded based on title and abstract screening. The remaining 130 records (n = 104 academic database records and n = 26 grey literature records) were subject to full text screening. Of these, ten were excluded because they did not report a behavioural or psychosocial intervention, 37 were excluded for lacking behavioural FP outcomes, 13 did not report male involvement, and 27 did not report detail on the theory(ies) of change applied. This left 43 records from the academic and grey literature search to be included in the review. Combined with the 20 reviews identified from the EGM, this meant a total of 63 records were included in analysis and synthesis (see Appendix 2).

Data extraction and analysis

Information regarding the characteristics and intended outcomes of interventions was extracted from records in addition to any reference to a published behaviour change theory or programme-specific theory of change. Where records (e.g. systematic reviews) contained information on multiple interventions, this information was extracted where available for all relevant interventions. Finally, brief details on how the theory of change was applied in practice was extracted from each record to aid synthesis.

Given the heterogeneity of included records and the objectives of this review, the data were analysed using narrative synthesis methods [24] and informed by a realist approach [25]. This involved adopting a flexible approach to data synthesis and reporting to articulate the design of interventions, and the intended mechanisms of theory in their design [25]. Drawing on these approaches the sum evidence for each study was grouped thematically in relation to intended outcomes, context, intervention design, and elements of theoretical underpinning [24, 25].

Results

The search strategy returned 1066 records. Following removal of duplicates, 941 unique records were screened by title and abstract and 745 excluded. Of the remaining 196 records, 133 were excluded at full text screening leaving 63 records. See Figs. 1 and 2 to illustrate the survey flow and reasons for exclusion.

Fig. 1

PRISMA study flow

Fig. 2

Inclusion and exclusion of records during screening

Study and intervention characteristics

Of the 63 records included in this review, 21 were reports of individual pieces of research (reported in, for example, primary research articles or conference papers); 32 were systematic reviews of interventions; 8 were methodological reports (e.g. protocols) or technical papers related to an intervention or programme, and 2 were review commentaries on FP interventions and services. Several studies (n = 28) reported on interventions in multiple countries. More than half of all records (n = 41) contained information on interventions delivered in LMICs, most commonly South Africa (n = 13), India (n = 10), Zimbabwe (n = 8), Tanzania (n = 7), and Uganda (n = 6). Of the records detailing interventions conducted in high-income countries (HICs) the majority detailed interventions in the USA (n = 16), and UK (n = 4). Three systematic reviews [26,27,28], and one guidance document did not systematically detail the countries of implementation.

All cited interventions targeted outcomes related to FP behaviours. These were most frequently related to contraceptive uptake and use (most commonly condom use), and the modification of sexual behaviours, e.g. avoiding unprotected sex or abstaining from sex. Interventions also sought to promote FP service uptake and engagement. This included providing information about available services and enabling engagement with these. Interventions focused on adolescents more typically focused on outcomes such as abstinence, reduced unprotected sex, and reduced unintended pregnancy.

In terms of intervention strategy, the majority of cited interventions involved the provision of information within their components, particularly those targeting adolescent populations. These were typically in the form of sexual health curricula delivered in school settings, individual and group educational workshops, or the dissemination of materials (e.g. information, condoms). Other notable strategies for intervention in the same vein were the development and promotion of knowledge and skills around FP use through individual and group counselling, community outreach programmes, educational mass media, and peer communication. The use of such community-level strategies were notably more prevalent in LMICs [29,30,31,32,33].

Characteristics of included records are presented in Table 1.

Table 1 Study characteristics

Theories of change

Over half of records (n = 73, 55%) were excluded at the full text screening stage because they did not include detail on an intervention theory of change. Among included intervention studies and reviews, most provided a narrative description of a theory of change and how it was applied in the study (n = 56, 89%). Just under half of these also featured graphical or diagrammatic representations of theories of change accompanying a narrative summary (n = 21, 33%). Reviews of interventions were also found to report the underlying theory of change for included interventions when presenting the study characteristics (n = 17, 27%). While many records did describe the application of theory of behaviour change narratively, this was often limited and lacked granular detail on how the intervention components were built on the underpinning behaviour change theory.

Several studies reported that intervention theories of change were based on established behaviour change theory. The most frequently cited behaviour change theories on which interventions were based were Social Cognitive Theory [34], Social Learning Theory [8], the Theory of Planned Behaviour/Reasoned Action [7, 35], and the Information-Motivation-Behaviour [IMB] Skills Model [36]. A summary of the theories of change identified across records may be found in Box 1. Most often, the theoretical frameworks cited were centred on individual level factors or influences of behaviour.

A central tenet among the most popular intervention theories of change was integrating elements of improving knowledge and skills and promoting more positive social norms around FP and sexual health behaviours. These factors were encompassed in some way by the aforementioned most popular theories of behaviour change. This was also further exemplified by reviews that presented a conceptual theory of change applied to studying several interventions [37,38,39,40,41,42,43]. These reviews also typically drew on existing behaviour change theories, synthesising a general proposed theory of change and applying this to the context and content investigated.

While interventions were chiefly focused on individual-level factors, some cited interventions incorporated theories of change with environmental and structural features, for example citing the Social-Ecological Model [31, 44,45,46]. Moreover the C-Change Model cited by Schuler and colleagues [31] described encouraging behaviour change communication at multiple levels of influence (interpersonal, community, and environmental). Furthermore, records detailing more holistic implementations [e.g. 47] incorporated elements within their novel theory of change related to environmental factors, such as improved service provision, in addition to strategies for individual factors.

Some interventions were also reported to incorporate multiple theories of change concurrently. For example, Jennings and colleagues [48] report the evaluation of a peer-led sex education intervention with adolescents in the USA: the Teen PEP Model. This programme was described as adopting a ‘multi-theoretical approach’ that incorporated Social Learning Theory, the Health Belief Model, and principles of Youth Leadership Development. These theories were used in tandem to improve adolescent knowledge, skills, and ultimately behaviours to avoid unintended pregnancy and sexually transmitted infections (STIs).

We identified several examples of interventions and programmes that detailed a novel theory of change, developed in tailored way for a specific intervention. One example of this was applied by Kulathinal and colleagues [49]. This intervention drew on a theory of change developed through desk-based research that identified three key issues in contraceptive uptake: a lack of information, gender bias, and unavailability or inaccessibility of contraceptives. This process model was used to develop intervention targets and activities to address these directly. This novel theory of change also notably incorporated information provision and gender-aware strategies. Other authors described more tailored theories of change developed based on the needs of a particular population and prior evidence. For instance, the PerFORM Framework and I-Change Model [42, 50] were presented as novel theories of change based on previously published behaviour change theories.

A minority of cited interventions detailed integration of gender-aware theories. Some examples of these were the Theory of Gender and Power [51], Gender Theory [52], Transformative Gender Justice Framework [53], Gender Transformative Programming [54], and the Gender Equality Continuum [55]. Gender-aware theories were less widely cited and defined than more traditional theories of behaviour change. A key record identified in relation to the use of gender in interventions, however, was the review by Schriver and colleagues [28]. This examined the evaluation of 99 gender-aware and -transformative health promotion interventions as per the Interagency Gender Working Group definition of the Gender Equality Continuum. It found that interventions with a novel theory of change were more likely to incorporate aspects of gender-awareness and transformation. In contrast, our review examined theories of change as reported by authors and reviewers, rather than the reviewers applying gender theory in investigation of existing interventions, which may explain the divergence in findings.

Box 1 Summary of theories of change identified in review

"5A" Framework for Behaviour Counselling Behavioural Economics Carey Communication Model Carrera Model Cascading Pathways Model C-Change Cognitive Behaviour Theory COM-B Model Diffusion of Innovations Eco-developmental Model Extended Parallel Process Model Framework for Voluntary Family Planning Programs that Respect, Protect, and Fulfil Human Rights Fogg Behaviour Model Gender Equality Continuum Gender Theory Gender Transformative Programming Health Belief Model I-Change Ideation Theory IMB Skills Model Innovation Diffusion Theory Life Skills Theory Motivational Enhancement Therapy Motivational Interviewing Natural Opinion Leader Model Novel Logic Models/Theories of Change

PerFORM Framework Personalised Normative Feedback Principles of Youth Leadership Development Problem Behaviour Theory Protection Motivation Theory Self-Efficacy Theory Self-Regulation Theory Social Development Theory Social Action Theory Social Behavioural Change Communication Social Change Theory (Attitudes, Skills, Self-Efficacy) Social Cognitive Theory Social Constructivist Perspective Social Control Theory Social Influence Theory Social Inoculation Theory Social Learning Theory Socio-Ecological Model Theory of Gender and Power Theory of Planned Behaviour Theory of Possible Selves Theory of Reasoned Action Theory of Triadic Influence Transformative Gender Justice Framework Transtheoretical Domains Framework Transtheoretical (Stages of Change) Model Youth Leadership Development

Discussion

Kurt Lewin [56, p. 129] claimed that “nothing is as practical as a good theory”, because, he argued, good practice is underpinned by rigorous understanding of the dynamics that influence it. With his adage in mind, we aimed to scope the range of behaviour change theories applied in FP interventions involving men and boys. The findings provide an overview of contemporary practices and reporting on which future programme developers and evaluators might draw to inform their designs.

We found that FP programmes involving men and boys employ a range of behaviour change theories. Among those most frequently cited within intervention studies and reviews were Social Cognitive Theory [34], Social Learning Theory [8], the Theory of Planned Behaviour/Reasoned Action [7, 35], and the IMB Skills Model [36]. These findings echo those of previous reviews of theory-based interventions to encourage contraceptive use among women [14, 15] and, therefore highlight a potential commonality in FP intervention designs regardless of participant gender.

Notwithstanding these commonalities, we also found that a diverse range of theoretical approaches were applied, with one or more of over 50 different novel or existing theories mentioned in the included studies. This likely reflects diversity in programme aims and objectives, target population, and contextual factors such as the implementation setting, which can, and should, influence the choice of theoretical approach [57]. Such a range of potential theoretical options may be perplexing for programme developers and suggests the need for intervention development guidelines to direct planners in this regard. A recent systematic review [58] reports a wide range of published health intervention development frameworks, some of which incorporate guidance on utilising behaviour change theory [59, 60].

Our review findings also highlight considerable heterogeneity in reporting of theories of change. While most records described theories of change using narrative methods, and to a lesser extent figures or logic models detailing processes, there was considerable variation in the level of detail provided in these. This suggests that the design and theories of change underpinning interventions should be substantively and consistently reported. The use of reporting frameworks for intervention design and components, e.g. the TIDiER guidelines [61], may benefit future evidence synthesis and programme development [13].

We have also found that, while cited in relation to some interventions, gender norms and gender structures remain under addressed in FP programmes involving men and boys. Only 14 percent (n = 9) of the included studies reported that their theory of change was informed by theories of gender. This supports findings of a previous review of health interventions with gender-theory integration, which reported considerable heterogeneity in approaches applied. Given the importance of promoting gender equality in relation to sexual and reproductive health and rights as a catalyst for change [37], the inclusion of gender-aware and gender-transformative theory and applications will be an important consideration for future programme design. Further, examination of the potential impact of doing so would be a worthy consideration for future evaluation research.

It should be considered that the publications reviewed here may have lacked exhaustive detail of intervention programming and theory in their reporting, even when these were present. It is possible that programmes are underpinned by behaviour change theory in their development and implementation, but that this goes unreported or underreported [28]. For instance, word limits imposed on academic publications might restrict the provision of information on theoretical underpinning. Moreover, even when interventions are successful, it may be difficult to determine what theoretical components and strategies have effected this, because this level of detail and evaluation is not often available to readers [14]. We therefore, emphasise the need for detail to be provided relating to theoretical underpinnings and expected causal mechanisms of behaviour change prospectively and evaluation of these to better understand what strategies are truly effective and how these affect changes.

Equally, trends in intervention design and reporting might be heavily influenced by the priorities in funding provided [38]. For example, the results of this review noted the frequent use of community-based interventions to promote contraceptive use in LMICs and of interventions promoting condom use which affects family planning and STI/HIV outcomes. It is possible that those programmes seeking to address both of these health issues are more likely to receive funding for implementation and subsequently published. There is, therefore, a need both for funders of intervention programmes to prompt or explicitly require implementers to detail any design and theoretical processes underpinning FP programmes, and for specific evaluation of contraceptive use intentions (i.e. for purposes of FP or SRHR) resulting from these interventions.

Finally, it should be noted that a large contributor to the exclusion of records was the absence or limited reporting of intervention theory of change. This accounted for more than half (55%) of the exclusions at the full-text screening stage. The implication of this is that theories of change used by FP interventions with men and boys may remain poorly understood or overlooked by readers and may fail to promote potentially valuable intervention strategies. This further highlights the need improve reporting of intervention design and use of theories of change in this area or to provide this information in supplementary material [62]. Given the importance of well-founded theory of change in intervention success [6] there remains a need for clear description and evaluation of this in intervention research. We therefore recommended that authors and publishers should make use of standardised frameworks (e.g. CONSORT, TIDieR) in reporting of intervention evaluation and design [63]. Intervention developers should not shy away from proposing and testing theories and reporting the process and results unambiguously to promote the development of theory and practice.

Implications

These findings highlight the diversity of behaviour change theory featured in FP programmes involving men and boys, and the diversity of reporting. We provide a useful overview for intervention programmers hoping to learn from the current state of theory of change in current FP programmes. We also highlight a call to action for future development and adaptations of interventions to unambiguously detail the use of theories of change and to not shy away from evaluation causal mechanisms of programmes. The implications for researchers are likewise to report on intervention theories of change sufficiently and consistently in evaluations and reviews, and to facilitate investigation of how theoretical components effect behaviour change.

Limitations

This review included a broad range of evidence from intervention studies, reviews, and methodological protocol publications. While this provided a wide range of data from which to draw conclusions, it is possible there exists some overlap in the reporting of interventions, i.e. programmes reported multiple times across several reviews. As such, this review does not make claims about the absolute prevalence of intervention characteristics and application of theory. Rather the results of this review are indicative of practices more generally in this area.

The results of this review are descriptive of only programme design in relation to theory of change and do not capture the entire range of potential influencing factors that might influence intervention fidelity and effectiveness. It must, therefore, be acknowledged that numerous factors may exist that contribute to the success of an intervention not described by this review. The intended theory of change of an intervention may be considered only one facet of behaviour change that exists within the complexities of wider context and unmeasured extraneous factors that also affect the target behaviour [64].

The final limitation to acknowledge is the restricted nature of this review in relation to data acquisition (i.e. limiting searching to title, abstract, and keywords). This approach allowed for the timely gathering and synthesis of data regarding a specific research question, but limits understanding of the full range of theories of change. Likewise, it should be highlighted that these results detail the theories and frameworks applied by interventions involving men and boys, making no claims regarding their efficacy to influence behaviour change for individuals or groups. While evidence tentatively indicates that the results of rapid reviews coincide with full systematic reviews [16], these results and analysis should be interpreted with appropriate caution, acknowledging that these can be used to inform an overview of theories of change rather providing than an exhaustive list.

Conclusion

This review provides an overview of contemporary practices and reporting with regards to the use of theories of behaviour change in FP programmes involving men and boys. The large number of screened records excluded due to a lack of information on theory of change and variability in reporting highlights a need for programmers and authors to make clear the underpinnings of their programmes. Given the importance of well-founded theory affecting change, this information is essential for future reviewers and programmers to make decisions on what constitutes good practice in FP interventions with men and boys. The presented evidence synthesis provides an overview of the intended mechanisms of change within current FP interventions, and is a call to action for authors to rigorously detail the use and application of theory in future programmes and for journal editors to allow them to do so.

Appendices

Appendix 1: Search terms

The search terms used were informed by the primary goal of this review; namely, to identify the underpinning theoretical framework of FP interventions with men and boys. An initial list of terms was reviewed by three members of the research team for face validity. The terms they agreed were then piloted in each target database and refined prior to implementation.

Terms used for the Family Planning and Males concepts were informed by those used by the previous systematic review of SRHR undertaken by members of the research team from which initial evidence was obtained [21]. The terms used for the Framework concept were adapted from those recommended by Booth and Carroll [65] and Rehfuess an colleagues [66].

1. Family planning	2. Males	3. Intervention type	4. Intervention design	5. Framework
“Family planning” OR contraception OR “birth spacing” OR “child spacing” OR “unplanned pregnancy” OR “unintended pregnancy” OR “unwanted pregnancy” OR abortion OR *fertility	Men OR man OR male OR males OR boy OR boys OR masculin* OR father* OR husband OR partner	Intervention* OR program* OR trial* OR random*	behav* OR educat* OR psycho* OR social	framework* OR model* OR ((theor* adj2 (change OR behav*)) OR concept* OR diagram* OR figure* OR construct OR principle*

Searches were limited to article Title, Abstract, and Keywords as appropriate across databases. The search strategy specified “1 AND 2 AND 3 AND 4 AND 5”, limiting results to publications from 2007 to present.

Appendix 2: References for included studies

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• 2. Aristide C, Mwakisole A, Mwakisole N, Emmanuel M, Laizer E, Kihunrwa A, Downs D, Wamoyi J, Downs J: Design and pilot testing of a church-based intervention to address interpersonal and intrapersonal barriers to uptake of family planning in rural Tanzania: a qualitative implementation study. BMJ Sex Reprod Health 2020, 46(3):226–233.

• 3. Asingwire N, Muhangi D, Kyomuhendo S, Leight J: Impact evaluation of youth-friendly family planning services in Uganda. In. New Delhi, India: International Initiative for Impact Evaluation; 2019.

• 4. Aventin A, Lohan M, O'Halloran P, Henderson M: Design and development of a film-based intervention about teenage men and unintended pregnancy: applying the Medical Research Council framework in practice. Eval Program Plann 2015, 49:19–30.

• 5. Bailey JV, Murray E, Rait G, Mercer CH, Morris RW, Peacock R, Cassell J, Nazareth I: Interactive computer-based interventions for sexual health promotion. Cochrane Database Syst Rev 2010(9):CD006483.

• 6. Barker G, Ricardo C, Nascimento M: Engaging Men and Boys in Changing Gender-Based Inequity in Health: Evidence from Programme Interventions. In. Geneva, Switzerland: World Health Organisation & Promundo; 2007.

• 7. Berhane A, Biadgilign S, Berhane A, Memiah P: Male involvement in family planning program in Northern Ethiopia: an application of the Transtheoretical model. Patient Educ Couns 2015, 98(4):469–475.

• 8. Casey SE: Evaluations of reproductive health programs in humanitarian settings: a systematic review. Confl Health 2015, 9(1):S1.

• 9. Chin HB, Sipe TA, Elder R, Mercer SL, Chattopadhyay SK, Jacob V, Wethington HR, Kirby D, Elliston DB, Griffith M et al.: The effectiveness of group-based comprehensive risk-reduction and abstinence education interventions to prevent or reduce the risk of adolescent pregnancy, human immunodeficiency virus, and sexually transmitted infections: two systematic reviews for the Guide to Community Preventive Services. Am J Prev Med 2012, 42(3):272–294.

• 10. Cornman DH, Schmiege SJ, Bryan A, Benziger TJ, Fisher JD: An information-motivation-behavioral skills (IMB) model-based HIV prevention intervention for truck drivers in India. Soc Sci Med 2007, 64(8):1572–1584.

• 11. Crankshaw TL, Matthews LT, Giddy J, Kaida A, Ware NC, Smit JA, Bangsberg DR: A conceptual framework for understanding HIV risk behavior in the context of supporting fertility goals among HIV-serodiscordant couples. Reproductive Health Matters 2012, 20:50–60.

• 12. Decat P, De Meyer S, Jaruseviciene L, Ibarra M, Medina J, Auquilla N, Hagens A: Community embedded reproductive health interventions for adolescents in Latin America: development of a complex intervention. European journal of contraception & reproductive health care 2013, 18:S98‐S99.

• 13. Doubova SV, Infante-Castañeda C, Pérez-Cuevas R: Internet-based educational intervention to prevent risky sexual behaviors in Mexican adolescents: study protocol. BMC Public Health 2016, 16(1):1–8.

• 14. Downing J, Jones L, Bates G, Sumnall H, Bellis MA: A systematic review of parent and family-based intervention effectiveness on sexual outcomes in young people. Health Education Research 2011, 26(5):808–833.

• 15. Fleming PJ, Silverman J, Ghule M, Ritter J, Battala M, Velhal G, Nair S, Dasgupta A, Donta B, Saggurti N et al.: Can a Gender Equity and Family Planning Intervention for Men Change Their Gender Ideology? Results from the CHARM Intervention in Rural India. Stud Fam Plann 2018, 49(1):41–56.

• 16. German M: An experimental test of parental influences on risky sexual behaviors among mexican-origin adolescents. Dissertation Abstracts International: Section B: The Sciences and Engineering 2009, 70(5-B):3170.

• 17. Gottschalk LB, Ortayli N: Interventions to improve adolescents' contraceptive behaviors in low- and middle-income countries: a review of the evidence base. Contraception 2014, 90(3):211–225.

• 18. Guse K, Levine D, Martins S, Lira A, Gaarde J, Westmorland W, Gilliam M: Interventions Using New Digital Media to Improve Adolescent Sexual Health: A Systematic Review. Journal of Adolescent Health 2012, 51(6):535–543.

• 19. Haberland NA: The Case for Addressing Gender and Power in Sexuality And HIV Education: A Comprehensive Review Of Evaluation Studies. International Perspectives on Sexual and Reproductive Health 2015, 41(1):31-U106.

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