ABSTRACT
Introduction:
High-quality contraceptive counseling is critical for supporting full, free, and informed contraceptive decision-making. However, the quality of family planning counseling remains poor globally and is too often not tailored to the individual client. The Counseling for Choice (C4C) approach comprises provider tools and training to structure counseling to center clients’ self-identified priorities and to provide relevant information and anticipatory side effects counseling.
Methods:
Providers at 25 public and 20 private facilities in Malawi were trained in the C4C approach. Between October and December 2018, we enrolled women seeking contraceptive services in intervention facilities and in matched comparison clinics in a quasi-experimental study. We collected data immediately before and after contraceptive services were received. We used multilevel logistic regression to compare dimensions of women’s counseling experience.
Results:
Of 1,179 participants, women counseled by C4C-trained providers rated their providers higher on several quality dimensions, including enabling informed decision-making (11.1% of the comparison group rated their provider as excellent versus 34.4% in intervention), respectful care (35.0% comparison versus 51.3% intervention), and information given about side effects (38.1% comparison versus 72.5% intervention).
Conclusion:
In Malawi, C4C improved the quality of care that clients received and their client experience relative to standard counseling. Counseling approaches that center clients’ priorities and provide enhanced anticipatory side effects counseling show promise in improving contraceptive counseling experiences and the quality of care that clients receive.
INTRODUCTION
A human rights–based approach to family planning (FP) programming addresses all levels of the health care system and the surrounding enabling environment to ensure the autonomy, agency, and satisfaction of FP clients.1 Access to high-quality information and counseling—in addition to affordable, voluntary, and nondiscriminatory contraceptive services and products—is a critical “lever” to pull to achieve quality of care within this system.1,2 Information exchange and interpersonal relations that occur between FP providers and clients have long been recognized as fundamental aspects of quality of care.3,4 Beyond the objective to uphold the client’s right to receive high-quality services, FP clients’ perceptions of quality have also been found to be associated with better contraceptive use dynamics, including increased voluntary method uptake, method satisfaction, and continuation in some settings, although evidence is mixed.5–7 Similarly, anticipatory side effects counseling—counseling that prepares women for contraceptive-induced bleeding changes and other side effects linked with using specific methods that they may experience—has been shown to increase method satisfaction and decrease discontinuation.8,9 However, evidence on structured counseling approaches that improve the quality of information sharing and interpersonal relations, as well as women’s experiences using contraception, remains weak.10
As a result, the quality of FP counseling remains poor globally. A recent analysis of Demographic and Health Survey data from 25 low- and middle-income countries found that the average country-level Method Information Index score was 34%—meaning that only one-third of current contraceptive users received counseling on more than 1 method, were told about side effects, and were told what to do if side effects occurred.11 Despite overwhelming evidence that fear and experience of adverse side effects and health concerns are major drivers of contraceptive nonuse and method-related discontinuation among women who wish to avoid pregnancy,12–13 counseling approaches widely used by FP providers in low- and middle-income countries lack an adequate focus on anticipatory side effects counseling.14 Evidence-based approaches that focus on improving care across these domains—approaches that are tailored to the client’s unique needs, improve information sharing and the client-provider relationship, and strengthen anticipatory side effects counseling—are urgently needed to support informed method choice aligned with clients’ preferences and to reduce negative contraceptive use experiences.
Counseling for Choice (C4C) is a new FP counseling approach developed by Population Services International, publicly available at https://www.psi.org/C4C.15 C4C, which comprises a provider training curriculum and job aid, replaces traditional tiered-effectiveness counseling with structured counseling based on the method attributes most valued by the individual client. C4C also provides a guided structure for comprehensive anticipatory side effects counseling, with a particular focus on menstrual bleeding changes. We used a quasi-experimental study design to evaluate the impact of the C4C intervention on the quality of counseling received, measured by clients’ experiences.
C4C replaces traditional tiered-effectiveness counseling with structured counseling based on the method attributes most valued by the individual client.
C4C APPROACH FOR FP COUNSELING
Contraceptive counseling has evolved as contraceptive approaches and tools have been iteratively developed and updated to improve quality of care. To counsel patients thoroughly on their choices, many clinicians use the autonomous approach to counseling. This involves providing information on all available, medically appropriate methods, with the patient subsequently deciding on a method with minimal provider input.16 Another common approach is the tiered-effectiveness method. With an effectiveness framework, clinicians present the most effective options first—highlighting voluntary long-acting reversible contraceptive methods.17 One approach that bridges the gap between the directive versus autonomous approaches is the shared decision-making model—a method that recognizes the expertise of both the provider, who has comprehensive information about methods from a clinical perspective, and the clients, who best understand their own needs and preferences.18 This and other common counseling approaches, such as Balanced Counseling Strategy Plus (BCS+), employ evidence-based best practices shown to improve quality of care and FP outcomes, such as increased uptake.19 These tools are widely used in FP programs globally; however, research on the effectiveness of specific approaches and tools to improve person-centered care and impact contraceptive use dynamics is limited.20
Among available counseling tools, the new C4C approach shares some common components with BCS+, the contraceptive counseling tool developed by Population Council and used across many low- and middle-income countries.21 BCS+ also prioritizes the demedicalization of provider language during counseling, uses client-centered and shared decision-making approaches, and incorporates specific job aids.22 From there, BCS+ and C4C diverge. BCS+ integrates tiered-effectiveness counseling into the approach, while C4C recognizes that clients may place a higher value on alternative method benefits—such as use on-demand, low frequency of provider visits required, or immediate return to fertility—and makes it easy for providers to compare contraceptives in relation to these other benefits. Where the algorithm, cards, and medical eligibility criteria information used by BCS+ are separate tools, C4C integrates the full suite of information and tools into a single, all-encompassing job aid. Different than BCS+ cards, the C4C job aid includes pages specifically meant to be viewed by lower-literacy clients. Finally, recognizing that experiencing side effects is a frequently cited reason for method discontinuation,12 C4C places a focus on anticipatory side effects counseling. While this comparison between C4C and BCS+ is meant to provide a well-known reference point for the community of practice familiar with this tool, our research does not seek to compare these 2 approaches.
C4C Intervention and Tools
Foundational to the C4C approach are 3 contraceptive counseling tenets: support the client to make an informed decision through clear and relevant information provision; provide high-quality, client-centered interpersonal care; and create a dialogue with clients about side effects, including what to expect and how to manage them.
Three tenets inform C4C’s approach: support the client to make an informed decision through clear and relevant information provision; provide high-quality, client-centered interpersonal care; and create a dialogue with clients about side effects.
The C4C approach has 2 key components: a 3-day training for providers and the Choice Book job aid for providers to use during counseling (Box). The training provides multiple tools and tech-niques to improve the counseling interaction by creating a dialogue about what matters to the client rather than using the counseling session as a didactic or rote lecture to impart the provider’s perspective (and potential bias) and a long list of facts. The Choice Book is a job aid for providers that includes both provider-facing and client-facing tools, including existing reference tools from the World Health Organization and other sources. Figure 1 shows an example book page illustrating how methods are compared across different attributes.
Example of Counseling on Specific Method Attributes From the C4C Choice Book Job Aid
Abbreviation: C4C, Counseling For Choice; EC, emergency contraception.
Components of the Counseling for Choice Approach
Provider training:
3 days
Training modules and activities reviewing Counseling for Choice (C4C) counseling principles
Role-play with the Choice Book
Choice Book (C4C provider job aid):
Counseling matrix: a tool illustrating which contraceptive options offer various contraceptive and lifestyle benefits
GATHER: demonstrating how C4C aligns with the GATHER (“Greet, Ask, Help, Explain, and Return”) approach23
Benefit-specific pages: comparing each method option relative to whether it offers a particular benefit (Figure 1)
Method-specific pages: in-depth information about each method, including the 3 Ws: what to do, what to expect, when to come back
Other resources and reference tools:
NORMAL tool for counseling on contraceptive induced menstrual bleeding changes24
Quick-start reference for breastfeeding and postabortion clients
World Health Organization Medical Eligibility Criteria
Job aid for DMPA reinjection
DMPA-SC self-injection instructions
Job aid for ruling out pregnancy
Instructions for management of side effects
Scale image of uterus
METHODS
Study Design
We conducted a quasi-experimental evaluation with an intervention and concurrent comparison group in 50 public and 40 private facilities in 8 districts in Northern, Central, and Southern Malawi (Dwanga, Lilongwe, Mangochi, Mchinji, Mzuzu, Nkhata Bay, Nsanje, and Salima). Intervention facilities were sampled through stratified random sampling of a full roster of facilities offering FP services and counseling. Facilities were stratified first by district, then by public or private sector, and finally by client load. Our goal was, within the districts, to balance the number of public and private facilities with high, medium, and low client flows in the intervention and control groups. Of 30 public and 30 private facilities sampled, 25 and 20, respectively, consented to participate in the C4C intervention. We then selected matched comparison facilities based on FP client volumes and sector (private or public). Included facilities were primarily FP and reproductive health clinics, including franchises, and hospitals with FP and reproductive health services or wards. During the study period, providers in the comparison group continued using tools with which they were well versed and familiar, such as the flipchart approved by the Ministry of Health; the comparison group was not instructed to use a specific FP counseling tool or approach. Selected providers in intervention facilities received a 3-day training on the C4C approach using the Choice Book that would guide the counseling experience. This training included role-play and practice to achieve competency in the counseling approach, which was assessed via quizzes and observation by the lead trainer. Half of the providers who participated in the training were nurse midwife technicians, about one-quarter were medical assistants, and the remaining one-quarter were either clinical officers or nurse midwife assistants. A post hoc review of trainings that all providers in both groups had received in the past 3 years revealed little difference between comparison (standard-of-care) and intervention providers in terms of training received before the C4C intervention.
Study Population
Between October and December 2018, we enrolled clients seeking FP services at intervention or comparison facilities. All women of reproductive age (aged 18–49 years) seeking FP services—including those initiating contraception, switching methods, or continuing method use—were eligible to participate in in-person study procedures on the date of enrollment. No compensation was provided for participation in the study.
Data Collection
Data collection began 3 months after the training to allow providers time to become accustomed to the C4C approach. Participants completed 2 surveys on the date of enrollment: a pre-counseling survey before seeing a provider and a second post-counseling survey immediately after seeing a provider. Both the pre- and post-counseling surveys were administered in person in a private area of the clinic. The pre-counseling survey captured demographic information, contraceptive history, and acceptability of specific contraceptive side effects. The post-counseling survey collected information on the method chosen and reasons for selection (including reasons for selecting no method), content of information received during the counseling session, and satisfaction with the counseling experience. Participants were asked in the post-counseling survey to identify their provider; in the final analysis sample, participants who visited an intervention facility but who received counseling from a provider not trained in C4C were excluded.
Ascertainment of Dependent Variables
We ascertained perceived quality of care using the validated 4-item Person-Centered Contraceptive Counseling scale,25 which includes individual items on clients’ perceptions of the respectfulness of care, whether they were allowed to voice their contraceptive method preferences, whether they felt their preferences were taken seriously, and whether they felt that they received adequate information to make a decision about a contraceptive method. Individual items are measured on a 5-point Likert scale (poor, fair, good, very good, or excellent). We report the items that comprise the Person-Centered Contraceptive Counseling scale individually and as a summative binary variable, equal to 1 if the highest rating (“excellent”) was given for all 4 items and 0 if otherwise according to published scale scoring guidance.26
Additional nonvalidated measures were developed to measure key C4C quality domains. For example, within the domain of information exchange and interpersonal relations, confidence using the chosen method was measured on a 5-point Likert scale (from “not at all” to “very confident”); in addition, binary (yes/no) variables were captured on whether the provider addressed all concerns about using contraception, whether the provider asked about prior contraceptive experience, whether the participant trusted the provider to keep the consultation private, and whether the provider helped make a plan for how to remember to use the method (among participants who selected to use short-term methods). In the side effects expectations and management domain, we captured 3 binary (yes/no) variables: whether the provider provided information on potential side effects, whether the provider helped plan to manage potential side effects, and whether the participant anticipated discontinuing her method immediately if she experienced side effects. A table in the Supplement provides further detail on how all independent variables are linked to each of our 3 quality of care domains of interest.
Statistical Analysis
To estimate the effect of C4C on quality received, we compared participants at intervention versus comparison facilities by fitting multilevel mixed effects models with robust standard errors, with individuals nested within facilities. For Likert scale outcomes, we fit multilevel logistic regression models with random intercepts for health facilities to estimate odds ratios (OR), which can be interpreted as the odds that women in the intervention group gave the highest rating on the Likert scale compared to women in the comparison group. For binary outcome variables, we used analogous mixed effects logistic regression models. Adjusted models include covariates for age (specified as a continuous variable), marital status (modeled categorically as currently married, living with a man as if married, or not currently married or living with a male partner), highest level of educational attainment (none, primary, secondary, or higher), number of living children (none, 1–2, 3–4, or 5 or more), contraceptive method type received at consultation (including none, if no method was chosen after counseling), and facility sector (public or private). The analysis was conducted using STATA version 15.1.
Ethical Approval
The study was approved by the Research Ethics Board of Population Services International in Washington, DC, and by the National Committee on Research in the Social Sciences and Humanities in Malawi. The district health management team and the head/owner of each participating facility gave permission for data collection at study sites. All participants gave their verbal informed consent before study procedures. The clients in both intervention and control sites gave their consent to participate in the study. The study participants in both intervention and control sites were briefed on the study objectives and all requirements of the consenting process.
RESULTS
A total of 1,179 women were enrolled for the in-person study components (N=578 in the comparison group and N=601 in the intervention group). In the full baseline sample, participants were evenly distributed across age groups, with a slightly higher proportion of women aged 18–24 years and a slightly lower proportion of women aged 35 years and older (Table 1). Most women (520 [90%]) were married and had 1 or more children. In the intervention group, 391 women (69%) chose injectable contraception and 121 (21%) chose implants, while in the comparison group, injectable contraception was more common, and implants were less so (401 [85%] and 31 [7%], respectively).
Demographics of Counseling for Choice Evaluation Participants in Malawi
Client Satisfaction and Experience of Quality of Care
More women rated their overall counseling experience as poor in the comparison group (32%) compared to the intervention group (8%), while more women in the intervention group rated their experience as excellent (35%) compared to women in the comparison group (8%) (Figure 2).
Client Rating of Overall Counseling Experience Immediately Post-Counseling
More women in the intervention group rated their experience as excellent compared to women in the comparison group.
Receipt of care from C4C-trained providers was associated with statistically significant, positive odds of rating the provider as “excellent” (the highest score) on 4 questions (Table 2): respecting you as a person (adjusted odds ratio [aOR]=2.65; 95% confidence interval [CI]=1.40, 5.02); letting you say what matters to you about your contraceptive method (aOR=2.20; 95% CI=1.20, 4.00); taking your preferences about contraception seriously (aOR=2.60; 95% CI=1.42, 4.75); and giving enough information to make the best decision about a method (aOR=5.14; 95% CI=2.72, 9.71). Participants in the intervention group had 4.6 times the odds of rating their provider as “excellent” on all 4 questions as the comparison group: 140 participants (23.3%) in the intervention group rated their provider as “excellent” on all 4 questions, relative to just 36 (6.2%) in the comparison group.
Person-Centered Contraceptive Counseling: Post-Counseling Results Among Women in the Counseling for Choice Evaluation, Malawi
The person-centered contraceptive counseling measures described in Table 2 are related to aspects of both domains of information exchange and interpersonal relations. In addition to these validated measures, we measured other aspects of counseling related to these domains with the additional variables in Table 3. Participants had 6-fold odds (aOR=6.4; 95% CI=3.08, 13.4) of rating their provider as excellent in addressing all concerns about their contraceptive method relative to those in the comparison group (Table 3). They were also more likely to report that their provider asked about their previous contraceptive experiences than clients in the comparison group, with 448 (74.5%) reporting “yes” versus 219 (37.9%) in the comparison (OR=6.76; 95% CI=3, 12.92). Clients choosing short-acting methods in the intervention group were more likely to report being helped to make a plan to use their method correctly (453 [79.8%] versus 258 [54.6%], respectively; aOR=6.45; 95% CI=2.57, 16.2). Clients in the intervention group were also more likely to report that they trusted their provider to keep their discussion confidential (575 [96.7%] versus 501 [86.7%]; (aOR=3.06; 95% CI=1.4, 6.67). Lastly, participants were more likely to rate that they were “very confident” in their choice of method in the intervention (280 [49.6%]) versus the comparison group (176 [37.5%]) (OR=1.94, 95% CI=1.0, 3.4), although this difference was not significant at the P=.05 level (P=.057).
Informed Decision-Making and Interpersonal Communication: Post-Counseling Results Among Women in the Counseling for Choice Evaluation, Malawi
Side Effects Expectations and Management
Women in the intervention group were more likely to report that the provider told them about possible side effects they might experience (412 [73%]) versus the comparison group (180 [38%]) (aOR=5.98; 95% CI=2.97, 12.03) (Table 4). Intervention group participants were also significantly more likely to report that their provider had helped them make a plan to manage side effects (441 [78%] versus 194 [41%] in the comparison group; aOR=8.79; 95% CI=3.68, 21.01). Fewer women in the intervention group reported that they would discontinue their method immediately if they experienced side effects (40 [7%]) versus the comparison group (52 [11%]), although this difference was not statistically significant.
Side Effects Expectations and Management: Baseline Results Among Women in Control and Intervention Groups, Among Women Who Received a Method
DISCUSSION
The novel C4C approach to FP counseling was specifically designed to address common issues with the quality of contraceptive counseling. The approach aims to support the client to make an informed decision about a method that aligns with their self-identified needs and individual preferences for specific method attributes. Clients counseled by C4C providers were more likely to report better care received, with more than 4 times as many reporting their experience as “excellent” overall. We find that the C4C approach improved clients’ experience of care across multiple domains and measures of person-centered care, including information exchange, interpersonal relations, and anticipatory side effects counseling, relative to standard-of-care counseling provided in public and private participating health facilities in Malawi.
We find that the C4C approach improved clients’ experience of care across multiple domains and measures of person-centered care relative to standard-of-care counseling.
The interpersonal relations quality of care domain in FP is critical to an overall high quality of care experience: a systematic review on the effects of person-centered quality of contraceptive care found that interventions to improve person-centeredness were consistently associated with improved client experience, perceptions of quality, and satisfaction.27 C4C addresses this domain of quality by anchoring the counseling approach in the core elements of respect, dignity, and empathy and in care that is nondiscriminatory and responsive to unique client needs. Participants in the intervention group of our study consistently rated their providers more positively across indicators of this client-provider relationship, reporting that their providers respected them as a person, let them say what mattered to them, took their preferences seriously, and were trusted to keep their conversation confidential compared to those in the comparison group.
A principal tenet of the C4C approach is to enable informed decision-making through clear and relevant information provision, building on counseling approaches such as the World Health Organization’s Decision-Making Tool for Family Planning Clients and Providers and the Balanced Counseling Strategy tool.28 Participants who received the C4C intervention were more likely to report that they had enough information to select a method that fit their needs and had more confidence in their ability to use their chosen method than participants in the comparison group. Their providers were more likely to ask them about their previous contraceptive use and to address all of their concerns. This exchange of information is critical to ensuring that clients are well informed about contraceptive options that best suit them. It includes having appropriate information to prepare them for side effects they may experience with a chosen method, a factor that is directly correlated to contraceptive use experiences, and method satisfaction over time. Clients counseled by C4C providers were more likely to report receiving this anticipatory side effects counseling and having discussed a plan with their provider for how to manage these side effects. Taken together, the findings from this evaluation suggest that the tailored counseling encouraged by the C4C approach, when compared to the standard of care, enables improved information exchange that helps clients make the best contraceptive choice for them. This is consistent with existing literature that describes improved client experiences when counseling includes clear information tailored to one’s expressed needs and preferences.29,30
Our findings suggest that the C4C approach, when compared to the standard of care, enables improved information exchange that helps clients make the best contraceptive choice for them.
While overall counseling received was significantly higher among women in the intervention group, the finding that even women in the intervention group continue to report some dissatisfaction with their counseling experience (14.7% reporting their experience as “fair” or “poor”) indicates that more can be done to further improve counseling, even when using the C4C approach. This study adds to the growing evidence base on the impact of the quality of counseling on client experience. Several studies have found positive effects of interventions to improve client- or person-centeredness and quality of contraceptive counseling on contraceptive use dynamics, hypothesizing that improved perceptions of interpersonal connection with a provider during counseling, having enough information to make an informed choice, and feeling confident to understand and manage side effects may be associated with method initiation and improved method use experiences.27,31–34 However, evidence of the impact of counseling on contraceptive use dynamics is mixed.21,35,36 While we do not look here at the impact of the C4C approach on method use over time, we do observe that women counseled using C4C were less likely to report that they would discontinue their method immediately if they experienced side effects, relative to those counseled using the standard approach. Although the difference was not statistically significant, this finding suggests that the C4C approach may support women to select methods with side effect profiles that are more tolerable for their preferences or to better prepare women for what they may expect in terms of side effects. Exploring the impact of improved quality in counseling on contraceptive use dynamics and satisfaction with FP methods over time should be a priority for those in the field aiming to develop and use counseling approaches that truly meet client needs.
Strengths and Limitations
A primary strength of this study is its inclusion of a robust comparison group that allows for direct comparison of key areas of the counseling experience between women who were counseled by C4C-trained providers and women who were not, allowing for more direct conclusions to be drawn regarding the effect that the C4C approach may have on women’s experiences with a provider.
There are also some limitations. Though unaware of the specific survey questions to clients or which clients would be surveyed, providers in the intervention group were aware that the new C4C approach on which they were trained would be studied, which may have affected adherence levels to the approach. The pre-counseling survey could have acted as an intervention itself or primed respondents to ask their provider about the topics being asked (e.g., about side effects). This may have improved the quality of counseling observed, but the effect would be expected to be nondifferential by treatment group since all participants received the same pre-counseling survey. Lastly, while it was not within the scope of our project to design a separate training for our comparison group, it is possible that improvements in quality of care could have been seen across some of the same indicators studied here regardless of the specific approach used; the act of simply retraining providers in principles of quality counseling could result in better counseling. Further research could explore the comparative impact of the C4C approach against training in other counseling approaches.
CONCLUSION
This study strengthens the evidence base for the utility and effectiveness of client-centered contraceptive counseling. Among FP clients in Malawi, we found that the C4C approach improved the perceived quality of care across multiple domains relative to standard counseling approaches. Counseling that focuses on supporting clients’ fully informed choice in method selection, improving client-centeredness of the interaction, and strengthening the client’s understanding of the potential side effects of their chosen method is a promising approach to improving contraceptive counseling and use experiences.
Acknowledgments
We would like to thank Laura Glish for her valuable contributions to the design of Counseling for Choice and this evaluation and Pierre Moon, Sarah Thurston, Laetitia Lemoine, and Brett Keller for their support throughout this study and thoughtful suggestions and comments during review of the article. We thank Grace Jaworski for supporting data analysis. We also thank implementing partners with the U.S. Agency for International Development (USAID) Office of Population and Reproductive Health that, via various USAID Communities of Practice, provided invaluable feedback to Counseling for Choice and contributed to our collective efforts to strengthen approaches to contraceptive counseling.
Funding
This article was made possible by the support of the American People through the U.S. Agency for International Development under the Support for International Family Planning and Health Organizations: Sustainable Networks 2 (AID-OAA-A-14-00037) and MOMENTUM Private Health Delivery (7200AA20CA00007).
Disclaimer
The views and opinions expressed in this article are those of the authors and not necessarily the views and opinions of the U.S. Agency for International Development. The funder played no role in the study design; in the collection, analysis, and interpretation of data; in the writing of the report; or the decision to submit the article for publication.
Author contributions
AK conceptualized the study design and analysis, conducted the analysis, and contributed to the writing. CWR supported data analysis and contributed to the writing and interpretation of results. AK, KD, EL, and AA contributed to the writing and interpretation of results. AK and KD also provided technical support and program management during study implementation. IM and PM carried out the study, contributed to the interpretation of results, and provided critical review and feedback. All authors reviewed and approved this article.
Competing interests
None declared.
Notes
Peer Reviewed
First published online: April 7, 2023.
Cite this article as: Kalamar A, Danna K, Angel A, et al. Evaluating Counseling for Choice in Malawi: a client-centered approach to contraceptive counseling. Glob Health Sci Pract. 2023;11(2):e2200319. https://doi.org/10.9745/GHSP-D-22-00319
- Received: July 8, 2022.
- Accepted: March 7, 2023.
- Published: April 28, 2023.
- © Kalamar et al.
This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly cited. To view a copy of the license, visit https://creativecommons.org/licenses/by/4.0/. When linking to this article, please use the following permanent link: https://doi.org/10.9745/GHSP-D-22-00319