1
|
Fifer S, Kularatne T, Tan M, Drummond F, Rule J. Understanding Treatment Preferences Among People Living with HIV in Australia: A Discrete Choice Experiment. Patient Prefer Adherence 2023; 17:1825-1843. [PMID: 37525842 PMCID: PMC10387247 DOI: 10.2147/ppa.s405288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 06/24/2023] [Indexed: 08/02/2023] Open
Abstract
Purpose To better understand what is most important to people living with human immunodeficiency virus (PLWH) when choosing their treatment. We assessed how PLWH trade off the potential risks and benefits of oral and long acting injectable (LAI) treatments. Participants and Methods Firstly, in-depth interviews were conducted with 11 PLWH to develop a holistic understanding of experiences and determine attributes that contribute to treatment decision-making. Secondly, a discrete choice experiment (DCE) was used to understand the treatment preferences for PLWH with n = 99 PLWH aged 18 years or over with a diagnosis of human immunodeficiency virus (HIV) and who were currently using anti-retroviral therapy (ART). Study participants were presented with 12 scenarios and asked to select their preferred treatment among two hypothetical injectable treatment alternatives, "injection 1" and "injection 2" and their current oral ART treatment. The DCE data were modelled using a latent class model (LCM). Results The model revealed significant heterogeneity in preferences for treatment attributes among study participants. Two segments/classes of PLWH were identified. The first segment expressed a strong preference for their current oral treatment; the second segment showed strong preference for the injection treatment and for it to be administered in a GP clinic. Overall, out-of-pocket cost was the most important attribute for participants. One-third of PLWH were willing to switch to an LAI. Conclusion Not all PLWH valued the same treatment attributes equally. Overall, out-of-pocket costs for treatments were considered by respondents as the most determining factor in making treatment choices. Results have important implications for healthcare policy and will serve to better inform patients and stakeholders involved in the treatment decision-making process about the treatment preferences of PLWH. Clinicians are encouraged to consider shared decision-making to establish the treatment course that best aligns with PLWH's treatment goals.
Collapse
Affiliation(s)
- Simon Fifer
- Community and Patient Preference Research Pty Ltd, Sydney, NSW, Australia
| | - Thames Kularatne
- Community and Patient Preference Research Pty Ltd, Sydney, NSW, Australia
| | - Marcus Tan
- Reimbursement & Market Access, GlaxoSmithKline Australia Pty Ltd, Melbourne, VIC, Australia
| | - Fraser Drummond
- Medical Dept, ViiV Healthcare Australia, Melbourne, VIC, Australia
| | - John Rule
- National Association of People with HIV Australia, Newtown, NSW, Australia
- School of Population Health, University of New South Wales, Sydney, Australia
| |
Collapse
|
2
|
Bonney EY, Lamptey H, Kyei GB. HIV cure: an acceptability scientific agenda. Curr Opin HIV AIDS 2023; 18:12-17. [PMID: 36503877 PMCID: PMC9757853 DOI: 10.1097/coh.0000000000000771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
PURPOSE OF REVIEW Recent years have seen major investments into HIV cure research, seeking a permanent cure or remission. The purpose of this review is to consider how this important research agenda could be broadened to include issues of acceptability and appropriateness for different populations. RECENT FINDINGS We discuss how the definitions of cure such as functional cure (remission) or complete cure (viral elimination) could be interpreted differently by various populations. We also discuss the different methods of cure and the importance of including Africa in cure research to ensure that emerging remedies could be trialled and utilized on the continent that bears the brunt of the AIDS pandemic. SUMMARY We propose that the social science research of HIV cure acceptability should be done concurrently with the basic and clinical sciences, to ensure that cure methods consider stakeholder preferences.
Collapse
Affiliation(s)
- Evelyn Y. Bonney
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
| | - Helena Lamptey
- Departments of Medicine and Molecular Microbiology, Washington University School of Medicine in St Louis, Missouri, USA
| | - George B. Kyei
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Accra, Ghana
- Departments of Medicine and Molecular Microbiology, Washington University School of Medicine in St Louis, Missouri, USA
- Medical and Scientific Research Center, University of Ghana Medical Center, Accra, Ghana
| |
Collapse
|
3
|
Kerkhoff AD, Muiruri C, Geng EH, Hickey MD. A world of choices: preference elicitation methods for improving the delivery and uptake of HIV prevention and treatment. Curr Opin HIV AIDS 2023; 18:32-45. [PMID: 36409315 PMCID: PMC9772083 DOI: 10.1097/coh.0000000000000776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
PURPOSE OF REVIEW Despite the growing availability of effective HIV prevention and treatment interventions, there are large gaps in their uptake and sustained use across settings. It is crucial to elicit and apply patients' and stakeholders' preferences to maximize the impact of existing and future interventions. This review summarizes quantitative preference elicitation methods (PEM) and how they can be applied to improve the delivery and uptake of HIV prevention and treatment interventions. RECENT FINDINGS PEM are increasingly applied in HIV implementation research; however, discrete choice experiments (DCEs) have predominated. Beyond DCEs, there are other underutilized PEM that may improve the reach and effectiveness of HIV prevention and treatment interventions among individuals by prioritizing their barriers to engagement and determining which attributes of interventions and delivery strategies are most valued. PEM can also enhance the adoption and sustained implementation of strategies to deliver HIV prevention and treatment interventions by assessing which attributes are the most acceptable and appropriate to key stakeholders. SUMMARY Greater attention to and incorporation of patient's and stakeholders' preferences for HIV prevention and treatment interventions and their delivery has the potential to increase the number of persons accessing and retained in HIV prevention and treatment services.
Collapse
Affiliation(s)
- Andrew D. Kerkhoff
- Division of HIV, Infectious Diseases and Global Medicine Zuckerberg San Francisco General Hospital and Trauma Center University of California, San Francisco, San Francisco, CA, USA
| | - Charles Muiruri
- Department of Population Health Sciences, Duke University School of Medicine, Durham, NC, USA
| | - Elvin H. Geng
- Division of Infectious Diseases, Washington University School of Medicine, St. Louis, MO, USA
| | - Matthew D. Hickey
- Division of HIV, Infectious Diseases and Global Medicine Zuckerberg San Francisco General Hospital and Trauma Center University of California, San Francisco, San Francisco, CA, USA
| |
Collapse
|
4
|
Homerova I, Patel A, Macallan DC. ‘We want it all’:
ART
preferences assessed by
D
esirability of
O
utcome
R
anking. HIV Med 2022; 24:588-595. [PMID: 36457194 DOI: 10.1111/hiv.13447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 11/11/2022] [Indexed: 12/04/2022]
Abstract
OBJECTIVES Understanding how people living with HIV (PLWH) view antiretroviral therapy (ART) prescribing choices is fundamental to patient-centred care. We used the Desirability of Outcome Ranking (DOOR) approach to explore patient ART preferences. METHODS Seventy-four PLWH entered the study, 20 into the 'pilot study', and 54 in the 'comparative study'. Participants ranked five different hypothetical patient stories by desirability. Each story comprised five narrative lines, each line addressing one treatment characteristic drawn from one of five pre-selected domains (treatment failure, treatment difficulty, adverse effects, long-term complications, life events). Narrative lines could be favourable or adverse. In the pilot study the number of adverse domains varied from one to five. Comparative study stories were fixed at two adverse versus three favourable domains, to test the relative ranking of different domains. RESULTS The pilot study identified a relationship between the number of adverse domains and rank (R2 = 0.54; p < 0.0001, Friedman test), however pairwise differences in ranking were not significant beyond three adverse domains. In the comparative study, all domains were ranked equally across the cohort (p = 0.88; Friedman test). In pre-defined demographic subgroup analyses, women ranked the 'treatment failure' domain significantly less desirable than men (p = 0.0014, Mann-Whitney test). CONCLUSIONS People living with HIV appear to care equally about all aspects of ART. The observation that male and female PLWH have different treatment priorities merits further investigation in larger studies. Interindividual differences highlight the importance of individualized shared decision-making and treatment personalization. DOOR may have a role as a pre-treatment assessment tool as well as a research technique.
Collapse
Affiliation(s)
- Ivana Homerova
- Institute for Infection & Immunity, St George's, University of London London UK
| | - Avani Patel
- Institute for Infection & Immunity, St George's, University of London London UK
| | - Derek C. Macallan
- Institute for Infection & Immunity, St George's, University of London London UK
- Infection Clinical Academic Group, St George's University Hospitals NHS Foundation Trust London UK
| |
Collapse
|
5
|
EL Masri H, McGuire TM, van Driel ML, Benham H, Hollingworth SA. Dynamics of Patient-Based Benefit-Risk Assessment of Medicines in Chronic Diseases: A Systematic Review. Patient Prefer Adherence 2022; 16:2609-2637. [PMID: 36164323 PMCID: PMC9508999 DOI: 10.2147/ppa.s375062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 08/25/2022] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND A critical gap exits in understanding the dynamics of patient-based benefit-risk assessment (BRA) of medicines in chronic diseases during the disease journey. PURPOSE To systematically review and synthesize current evidence on the changes of patients' preferences about the benefits and risks of medicines during their disease journey including the influence of disease duration and severity, and previous treatment experience. METHODS A systematic review of studies identified in PubMed and Embase, from inception to November 2020, was conducted in accordance with the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) statement. Articles were eligible if they analyzed adult patient-based BRA of medicines with a chronic disease, based on at least one of the pre-specified dimensions: disease severity, disease duration, or previous treatment experience. RESULTS A total of 26,228 articles were identified and 105 were eligible for inclusion. Of these, 85 detected a variation in patient-based BRA of medicines with at least one of the pre-specified criteria. Patients with higher disease severity and more treatment experience have increased risk tolerance. It remains inconclusive whether disease duration directly affects the relative importance of a patient's preference. CONCLUSION Factors important for patients' BRA of their medicines during a chronic disease journey vary more with their clinical situation and previous treatment experience than with time since diagnosis. Due to the importance of these factors on patients' perspectives and potential impact on their decision-making and eventually their clinical outcomes, there is a need for more studies to assess the dynamics of patients' BRA in every disease.
Collapse
Affiliation(s)
- Hiba EL Masri
- School of Pharmacy, The University of Queensland, Brisbane, Queensland, Australia
- Correspondence: Hiba EL Masri, School of Pharmacy, The University of Queensland, 20 Cornwall St, Woolloongabba, Brisbane, Queensland, 4102, Australia, Tel +61 478512234, Email
| | - Treasure M McGuire
- School of Pharmacy, The University of Queensland, Brisbane, Queensland, Australia
- Faculty of Health Sciences and Medicine, Bond University, Robina, Queensland, Australia
- Mater Pharmacy, Mater Health, Brisbane, Queensland, Australia
| | - Mieke L van Driel
- Primary Care Clinical Unit, Faculty of Medicine, The University of Queensland, Brisbane, Australia
| | - Helen Benham
- Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
- Department of Rheumatology, Princess Alexandra Hospital, Brisbane, Queensland, Australia
| | | |
Collapse
|
6
|
Belay YA, Yitayal M, Atnafu A, Taye FA. Patients' preferences for antiretroviral therapy service provision: a systematic review. COST EFFECTIVENESS AND RESOURCE ALLOCATION 2021; 19:56. [PMID: 34461939 PMCID: PMC8404280 DOI: 10.1186/s12962-021-00310-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 08/16/2021] [Indexed: 11/25/2022] Open
Abstract
Background Achieving global targets of adherence to treatment, retention in care, and treatment success remains a challenge. Health system investment to make antiretroviral therapy services more responsive to patients’ needs and values could address these impediments. Appropriate resource allocation to implement differentiated HIV treatment services demands research evidence. This study aimed to provide an overview of the patients’ preferences for antiretroviral therapy service delivery features. Methods Electronic databases (PubMed, Web of Science, Embase, and CINAHL) and search engines (Google and Google Scholar) were searched. This review has followed a convergent segregated approach to synthesis and integration. Data from the included studies were systematically extracted, tabulated, and summarised in a narrative review. Studies that analysed preferences for antiretroviral therapy regardless of the method used and published in the English language in any year across the world and HIV positive clients who were 15 years and above on 4th February 2021 were included for this review. The quality of the included studies was assessed using the mixed methods appraisal tool. A thematic synthesis of the data from the findings section of the main body of the qualitative study was undertaken. ATLAS.ti software version 7 was used for qualitative synthesis. Results From the 1054 retrieved studies, only 23 studies (16 quantitative, three qualitative, and four mixed-methods) fulfilled the inclusion criteria. The median number of attributes used in all included quantitative studies was 6 (Inter Quartile Range 3). In this review, no study has fulfilled the respective criteria in the methodological quality assessment. In the quantitative synthesis, the majority of participants more valued the outcome, whereas, in the qualitative synthesis, participants preferred more the structure aspect of antiretroviral therapy service. The thematic analysis produced 17 themes, of which ten themes were related to structure, three to process, and four to outcome dimension of Donabedian’s quality of care model. The findings from individual quantitative and qualitative syntheses complement each other. Conclusions In this review, participants’ value for antiretroviral therapy service characteristics varied across included studies. Priorities and values of people living with HIV should be incorporated in the policy, practice, research, and development efforts to improve the quality of antiretroviral therapy service hence avoid poor patient outcomes. Supplementary Information The online version contains supplementary material available at 10.1186/s12962-021-00310-7.
Collapse
Affiliation(s)
- Yihalem Abebe Belay
- Department of Public Health, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia. .,Department of Health Systems and Policy, Institute of Public Health, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia.
| | - Mezgebu Yitayal
- Department of Health Systems and Policy, Institute of Public Health, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
| | - Asmamaw Atnafu
- Department of Health Systems and Policy, Institute of Public Health, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia
| | - Fitalew Agimass Taye
- Department of Accounting, Finance, and Economics, Griffith University, Brisbane, Australia
| |
Collapse
|
7
|
Yang Y, Thapa R, Lewis FM. Using Best-Worst Scaling to Determine the Most Burdensome Menopausal Symptoms in Cambodian Women Living With HIV. J Assoc Nurses AIDS Care 2021; 32:174-187. [PMID: 33449581 DOI: 10.1097/jnc.0000000000000226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
ABSTRACT As persons living with HIV live longer, it is important to understand the symptoms experienced by menopausal women living with HIV (WLWH). This study used best-worst scaling (BWS) to determine the menopausal symptoms that are most burdensome for Cambodian WLWH. Participants were asked to rate a list of menopausal symptoms in terms of the most and least burdensome in their lives via BWS. The final analysis included 183 participants, 67 of whom were premenopausal, 47 perimenopausal, and 69 postmenopausal women. Physical and mental exhaustion (mean best-worst score = 319) was rated as the most burdensome symptom, and hot flushes and sweating were the least burdensome (mean best-worst score = -181). The BWS provides information on priorities for the distribution of health care resources. Understanding how Cambodian WLWH prioritize burdensome menopausal symptoms is crucial for choosing the most contextually sensitive method to provide health care services and interventions.
Collapse
Affiliation(s)
- Youngran Yang
- Youngran Yang, PhD, MPH, RN, is an Associate Professor, School of Nursing, Research Institute of Nursing Science, Sustainable Development Center, Jeonbuk National University, Jeonju, Korea. Roshna Thapa, MSN, RN, is a Research Assistant, School of Nursing, Research Institute of Nursing Science, Jeonbuk National University, Jeonju, Korea. Frances Marcus Lewis, PhD, RN, FAAN, is an Endowed Professor in Nursing, Department of Family and Child Nursing, School of Nursing, University of Washington, Seattle, Washington, USA
| | | | | |
Collapse
|
8
|
Goossens AJM, Cheung KL, Sijstermans E, Conde R, Gonzalez JGR, Hiligsmann M. A discrete choice experiment to assess patients' preferences for HIV treatment in the rural population in Colombia. J Med Econ 2020; 23:803-811. [PMID: 32098539 DOI: 10.1080/13696998.2020.1735398] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Aim: To elicit patients' preferences for HIV treatment of the rural population in Colombia.Methods: A discrete choice experiment (DCE), conducted in a HIV clinic in Bogotá, was used to examine the trade-off between five HIV treatment attributes: effect on life expectancy, effect on physical activity, risk of moderate side-effects, accessibility to clinic, and economic costs to access controls. Attributes selection was based on literature review, expert consultation and a focus group with six patients. An efficient experimental design was used to define two versions of the questionnaire with each of 12 choice sets and a dominance task was added to check reliability. A mixed logit model was then used to analyse the data and sub-group analyses were conducted on the basis of age, gender, education, and sexual preference.Results: A total of 129 HIV patients were included for analysis. For all treatment attributes, significant differences between at least two levels were observed, meaning that all attributes were significant predictors of choice. Patients valued the effect on physical activity (conditional relative importance of 27.5%) and the effect on life expectancy (26.0%) the most. Sub-group analyses regard age and education showed significant differences: younger patients and high educated patients valued the effect on physical activity the most important, whereas older patients mostly valued the effect on life expectancy and low educated patients mostly valued the accessibility to clinic.Limitations: One potential limitation is selection bias, as only patients from one HIV clinic were reached. Additionally, questionnaires were partly administered in the waiting rooms, which potentially led to noise in the data.Conclusions: This study suggests that all HIV treatment characteristics included in this DCE were important and that HIV patients from rural Colombia valued short-term efficacy (i.e. effect on physical activity) and long-term efficacy (i.e. effect on life expectancy) the most.
Collapse
Affiliation(s)
- Anne J M Goossens
- Department of Health Services Research, CAPHRI Care and Public Health Research Institute, Maastricht University, Maastricht, The Netherlands
| | - Kei Long Cheung
- Department of Clinical Sciences, College of Health and Life Sciences, Brunel University London, London, United Kingdom
| | - Eric Sijstermans
- Department of Health Services Research, CAPHRI Care and Public Health Research Institute, Maastricht University, Maastricht, The Netherlands
| | - Rafael Conde
- Centro de Investigación Clínica ACISC, Asistencia Científica de Alta Complejida, Bogota, Colombia
| | - Javier G R Gonzalez
- Rosario Graduate School of Business, School of Business, Administración en Salud, Universidad del Rosario, Bogotá, Colombia
| | - Mickael Hiligsmann
- Department of Health Services Research, CAPHRI Care and Public Health Research Institute, Maastricht University, Maastricht, The Netherlands
| |
Collapse
|
9
|
Sijstermans E, Cheung KL, Goossens AJM, Conde R, Gonzalez JGR, Hiligsmann M. A discrete choice experiment to assess patients' preferences for HIV treatment in the urban population in Colombia. J Med Econ 2020; 23:812-818. [PMID: 32098614 DOI: 10.1080/13696998.2020.1735399] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Aim: This study aimed to assess patients' preferences for HIV treatment in an urban Colombian population.Methods: A Discrete Choice Experiment (DCE) was conducted. Urban Colombian HIV patients were asked to repetitively choose between two hypothetical treatments that differ in regard to five attributes 'effect on life expectancy', 'effect on physical activity', 'risk of moderate side effects, 'accessibility to clinic' and 'economic cost to access controls'. Twelve choice sets were made using an efficient design. A Mixed Logit Panel Model was used for the analysis and subgroup analyses were performed according to age, gender, education level and sexual preference.Results: A total of 224 HIV patients were included. All attributes were significant, indicating that there were differences between at least two levels of each attribute. Patients preferred to be able to perform all physical activity without difficulty, to have large positive effects on life expectancy, to travel less than 2 h, to have lower risk of side-effects and to have subsidized travel costs. The attributes 'effect on physical activity' and 'effects on life expectancy' were deemed the most important. Sub-analyses showed that higher educated patients placed more importance on the large positive effects of HIV treatment, and a more negative preference for subsidized travel cost (5% level).Limitations: A potential limitation is selection bias as it is difficult to make a systematic urban/rural division of respondents. Additional, questionnaires were partly administered in the waiting rooms, which potentially led to some noise in the data.Conclusions: Findings suggests that short-term efficacy (i.e. effect on physical activity) and long-term efficacy (i.e. effect on life expectancy) are the most important treatment characteristics for HIV urban patients in Colombia. Preference data could provide relevant information for clinical and policy decision-making to optimize HIV care.
Collapse
Affiliation(s)
- Eric Sijstermans
- Department of Health Services Research, CAPHRI Care and Public Health Research Institute, Maastricht University, Maastricht, The Netherlands
| | - Kei Long Cheung
- Department of Clinical Sciences, College of Health and Life Sciences, Brunel University London, London, UK
| | - Anne J M Goossens
- Department of Health Services Research, CAPHRI Care and Public Health Research Institute, Maastricht University, Maastricht, The Netherlands
| | - Rafael Conde
- Centro de Investigación Clínica ACISC, Asistencia Científica de Alta Complejida, Bogota, Colombia
| | - Javier G R Gonzalez
- Rosario Graduate School of Business, School of Business, Administración en Salud, Universidad del Rosario, Bogotá, Colombia
| | - Mickael Hiligsmann
- Department of Health Services Research, CAPHRI Care and Public Health Research Institute, Maastricht University, Maastricht, The Netherlands
| |
Collapse
|
10
|
Perceived Importance of Factors in Cannabis Purchase Decisions: A Best-worst Scaling Experiment. THE INTERNATIONAL JOURNAL OF DRUG POLICY 2020; 91:102793. [PMID: 32482489 DOI: 10.1016/j.drugpo.2020.102793] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 03/15/2020] [Accepted: 05/12/2020] [Indexed: 11/20/2022]
Abstract
BACKGROUND Consumers' access to cannabis has been considerably expanded in US states where recreational cannabis was legalized and commercialized. However, little is known about the important factors influencing consumers' purchase decisions in cannabis retail dispensaries. This study examined cannabis users' perceptions of the relative importance of policy-relevant factors when they made cannabis purchase decisions. METHODS An online survey was administered to 817 adult cannabis users in seven states in the US (California, Colorado, Maine, Massachusetts, Nevada, Oregon, and Washington) that had approved cannabis commercialization by the time of interview in January 2018. Twenty policy-relevant cannabis attributes were evaluated, including those pertaining to product characteristics, quality, package characteristics, price and free sample, store characteristics, and restrictions on use. A best-worst scaling experiment was employed, which asked respondents to select the most and the least important attributes in a choice scenario. Each respondent answered 10 choice scenarios, each including a random combination of four attributes out of the 20. The relative importance of each attribute was evaluated using hierarchical Bayesian estimation of mixed logit models. RESULTS Overall, 'quality', 'strain type', 'price', 'THC' (tetrahydrocannabinol) and 'pesticide' were the top five important attributes affecting cannabis users' willingness to buy cannabis in a dispensary. These five attributes jointly accounted for approximately half of the total importance. In subsample analysis, both recreational and dual-purpose users attached higher importance to 'quality', 'THC', and 'price', whereas medical users tended to think 'CBD' (cannabidiol) and 'pesticide' were more important. All cannabis users perceived 'package' to be the least important attribute. Gender had no major differences in perceptions. CONCLUSIONS Cannabis users in general perceived product characteristics, quality, and price to be important factors in their willingness to buy cannabis in dispensaries. There were heterogeneities in the perceptions by cannabis use purposes. The findings might deserve consideration in cannabis policy design.
Collapse
|
11
|
Humphrey JM, Naanyu V, MacDonald KR, Wools-Kaloustian K, Zimet GD. Stated-preference research in HIV: A scoping review. PLoS One 2019; 14:e0224566. [PMID: 31665153 PMCID: PMC6821403 DOI: 10.1371/journal.pone.0224566] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 10/16/2019] [Indexed: 12/21/2022] Open
Abstract
Discrete choice experiments (DCE), conjoint analysis (CA), and best-worst scaling (BWS) are quantitative techniques for estimating consumer preferences for products or services. These methods are increasingly used in healthcare research, but their applications within the field of HIV research have not yet been described. The objective of this scoping review was to systematically map the extent and nature of published DCE, CA, and BWS studies in the field of HIV and identify priority areas where these methods can be used in the future. Online databases were searched to identify published HIV-related DCE, CA and BWS studies in any country and year as the primary outcome. After screening 1,496 citations, 57 studies were identified that were conducted in 26 countries from 2000-2017. The frequency of published studies increased over time and covered HIV themes relating to prevention (n = 25), counselling and testing (n = 10), service delivery (n = 10), and antiretroviral therapy (n = 12). Most studies were DCEs (63%) followed by CA (37%) and BWS (4%). The median [IQR] sample size was 288 [138-496] participants, and 74% of studies used primary qualitative data to develop attributes. Only 30% of studies were conducted in sub-Saharan Africa where the burden of HIV is highest. Moreover, few studies surveyed key populations including men who have sex with men, transgender people, pregnant and postpartum women, adolescents, and people who inject drugs. These populations represent priorities for future stated-preference research. This scoping review can help researchers, policy makers, program implementers, and health economists to better understand the various applications of stated-preference research methods in the field of HIV.
Collapse
Affiliation(s)
- John M. Humphrey
- Department of Medicine, Indiana University, Indianapolis, Indiana, United States of America
| | - Violet Naanyu
- Department of Behavioral Sciences, Moi University, Eldoret, Uasin Gishu County, Kenya
- AMPATH Program, Eldoret, Uasin Gishu County, Kenya
| | - Katherine R. MacDonald
- Department of Pediatrics, Indiana University, Indianapolis, Indiana, United States of America
| | - Kara Wools-Kaloustian
- Department of Medicine, Indiana University, Indianapolis, Indiana, United States of America
| | - Gregory D. Zimet
- Department of Pediatrics, Indiana University, Indianapolis, Indiana, United States of America
| |
Collapse
|