Optimizing Differentiated HIV Treatment Models in Urban Zimbabwe: Assessing Patient Preferences Using a Discrete Choice Experiment

Framework for determining the optimal course of action when efficiency and affordability measures differ by perspective in cost-effectiveness analysis-with an illustrative case of HIV treatment in Mozambique

BACKGROUND

Cost-effectiveness analysis (CEA) is a standard tool for evaluating health programs and informing decisions about resource allocation and prioritization. Most CEAs evaluating health interventions in low- and middle-income countries adopt a health sector perspective, accounting for resources funded by international donors and country governments, while often excluding out-of-pocket expenditures and time costs borne by program beneficiaries. Even when patients' costs are included, a companion analysis focused on the patient perspective is rarely performed. We view this as a missed opportunity.

METHODS

We developed methods for assessing intervention affordability and evaluating whether optimal interventions from the health sector perspective also represent efficient and affordable options for patients. We mapped the five different patterns that a comparison of the perspective results can yield into a practical framework, and we provided guidance for researchers and decision-makers on how to use results from multiple perspectives. To illustrate the methodology, we conducted a CEA of six HIV treatment delivery models in Mozambique. We conducted a Monte Carlo microsimulation with probabilistic sensitivity analysis from both patient and health sector perspectives, generating incremental cost-effectiveness ratios for the treatment approaches. We also calculated annualized patient costs for the treatment approaches, comparing the costs with an affordability threshold. We then compared the cost-effectiveness and affordability results from the two perspectives using the framework we developed.

RESULTS

In this case, the two perspectives did not produce a shared optimal approach for HIV treatment at the willingness-to-pay threshold of 0.3 × Mozambique's annual GDP per capita per DALY averted. However, the clinical 6-month antiretroviral drug distribution strategy, which is optimal from the health sector perspective, is efficient and affordable from the patient perspective. All treatment approaches, except clinical 1-month distributions of antiretroviral drugs which were standard before Covid-19, had an annual cost to patients less than the country's annual average for out-of-pocket health expenditures.

CONCLUSION

Including a patient perspective in CEAs and explicitly considering affordability offers decision-makers additional insights either by confirming that the optimal strategy from the health sector perspective is also efficient and affordable from the patient perspective or by identifying incongruencies in value or affordability that could affect patient participation.

Clinical outcomes after extended 12-month antiretroviral therapy prescriptions in a community-based differentiated HIV service delivery programme in South Africa: a retrospective cohort study

INTRODUCTION

There is an urgent need for more efficient models of differentiated antiretroviral therapy (ART) delivery for people living with HIV (PLHIV), with the World Health Organization calling for evidence to guide whether annual ART prescriptions and consultations (12M scripts) should be recommended in global guidelines. We assessed the association between 12M scripts (allowed temporarily during the COVID-19 pandemic) versus standard 6-month prescriptions and consultations (6M scripts) and clinical outcomes.

METHODS

We performed a retrospective cohort study using routine, de-identified data from 59 public clinics in KwaZulu-Natal, South Africa. We included PLHIV aged ≥18 years with a recent suppressed viral load (VL) who had been referred for community ART delivery with 6M or 12M scripts. We used modified Poisson regression to compare 12-month retention-in-care (≤90 days late for all visits) and viral suppression (<50 copies/ml) between prescription groups.

RESULTS

Among 27,148 PLHIV referred for community ART during Jun-Dec 2020, 57.4% received 12M scripts. The median age was 39 years and 69.4% were women. Age, sex, prior community ART use and time on ART were similar across groups. However, more of the 12M script group had dolutegravir-based regimens (60.0% vs. 46.3%). The median (interquartile range) number of clinic visits in the year of follow-up was 1(1-1) in the 12M group and 2(2-3) in the 6M group. Retention was 94.6% (95% confidence interval [CI]: 94.2%-94.9%) among those receiving 12M scripts and 91.8% (95% CI: 91.3%-92.3%) among those with 6M scripts. 17.1% and 16.9% of clients in the 12M and 6M groups were missing follow-up VL data, respectively. Among those with VLs, 92.4% (95% CI: 92.0%-92.9%) in the 12M group and 91.4% (95% CI: 90.8%-92.0%) in the 6M group were suppressed. After adjusting for age, sex, ART regimen, time on ART, prior community ART use and calendar month, retention (adjusted risk ratio [aRR]: 1.03, 95% CI: 1.01-1.05) and suppression (aRR: 1.00, 95% CI: 0.99-1.01) were similar across groups.

CONCLUSIONS

Among PLHIV referred for community ART with a recent suppressed VL, the use of 12M scripts reduced clinic visits without impacting short-term clinical outcomes. 12M scripts should be considered for differentiated service delivery programmes.

Preferences of People Living with HIV for Long-Acting Antiretroviral Treatment in Germany: Evidence from a Discrete Choice Experiment

OBJECTIVE

This study aimed to elicit preferences for attributes of current and novel long-acting antiretroviral therapy for human immunodeficiency virus treatment.

METHODS

Primary survey data were collected (July-October 2022) on a sample of 333 people living with human immunodeficiency virus in Germany from a patient recruitment agency. Respondents were invited by e-mail to respond to a web-based questionnaire. After performing a systematic literature review, we conducted qualitative semi-structured interviews to identify and select the key attributes of drug therapy for patients' preferences for human immunodeficiency virus treatment. Based on this, a discrete choice experiment survey elicited preferences for long-acting antiretroviral therapy characteristics, including the type of medication, frequency of dosing, the location of treatment, the risk of both short-term and long-term side effects, as well as possible interactions with other medications or (party) drugs. A statistical data analysis was performed using multinomial logit models. An additional latent class multinomial logit was performed to evaluate subgroup differences.

RESULTS

Overall, 226 respondents (86% male, mean age 46.1 years) were included in the analysis. The frequency of dosing (36.1%) and the risk of long-term side effects (28.2%) had the greatest influence on preferences. The latent class analysis identified two patient groups. While the first class (n = 135; 87% male, mean age 44.4 years) found the frequency of dosing (44.1%) to be most important, the second class (n = 91; 85% male, mean age 48.6 years) focused on the risk of long-term side effects (50.3%). The evaluation of structural variables showed that male respondents, those living in small cities or villages, and those with better health status results were significantly more likely to be assigned to the second class (p < 0.05 each).

CONCLUSIONS

All attributes included in our survey were important to participants when choosing an antiretroviral therapy. We found evidence that the frequency of dosing as well as the risk of long-term side effects have a particular impact on the acceptance of novel therapy regimens and should be considered in order to optimize adherence and satisfaction.

Development of attributes and attribute levels for a discrete choice experiment on patients' and providers' choice for antiretroviral therapy service in Northwest Ethiopia

BACKGROUND

Discrete choice experiments (DCEs) are used to assess the strength of preferences and value of interventions. However, researchers using this approach have been criticized for not conducting or publishing rigorous studies to select the required attributes and levels. Proper specification of attributes and their levels determines the validity of DCE. Hence, our study aimed to identify and define attributes and levels for the design of a DCE to elicit patients' and providers' preferences for ART service in Northwest Ethiopia.

METHODS

Four stages were followed to derive the final list of attributes and levels: (1) a literature review to derive conceptual attributes; (2) key informant interviews of 17 providers and in-depth interviews of 15 adult stable patients to identify context-specific attributes and attribute levels; (3) ranking survey among 31 HIV/AIDS program implementers and rating survey among 35 adult stable patients and 42 health workers providing antiretroviral therapy (ART) service to indicate participants' preference of attributes; and (4) an expert opinion to reduce the list of attributes and levels.

RESULTS

First, a literature review identified 23 candidate attributes. Second, individual-level analysis of the qualitative transcripts confirmed 15 of these 23 attributes. Third, the ranking and rating surveys put the importance of the 23 ART service attributes in order of preference. Fourth, through discussions with eight experts, 17 attributes were discarded based on multiple criteria. The six retained attributes were: the location of ART refills, the frequency of receiving ART refills, the person providing ART refills, the participants/others seen at the same ART refill visit, medication refill pick-up/delivery times, and the total cost of the visit during antiretroviral (ARV) medication refill. Finally, levels were assigned to these 6 attributes based on data from the literature, transcripts, and knowledge of the Ethiopian context.

CONCLUSIONS

This detailed description illuminates the attribute development process and provides the reader with a basis for evaluating the rigor of this phase of DCE construction. This paper contributes empirical evidence to the limited methodological literature on attributes and levels of development for DCE, thereby providing further empirical guidance on ART service preference, specifically among patients of low- and middle-income countries.

Patient and health worker perspectives on quality of HIV care and treatment services in Haiti

BACKGROUND

Poor quality of care is a barrier to engagement in HIV care and treatment in low- and middle-income country settings. This study involved focus group discussions (FGD) with patients and health workers in two large urban hospitals to describe quality of patient education and psychosocial support services within Haiti's national HIV antiretroviral therapy (ART) program. The purpose of this qualitative study was to illuminate key gaps and salient "ingredients" for improving quality of care.

METHODS

The study included 8 FGDs with a total of 26 male patients and 32 female patients and 15 smaller FGDs with 57 health workers. The analysis used a directed content analysis method, with the goal of extending existing conceptual frameworks on quality of care through rich description.

RESULTS

Dimension of safety, patient-centeredness, accessibility, and equity were most salient. Patients noted risks to privacy with both clinic and community-based services as well as concerns with ART side effects, while health workers described risks to their own safety in providing community-based services. While patients cited examples of positive interactions with health workers that centered their needs and perspectives, they also noted concerns that inhibited trust and satisfaction with services. Health workers described difficult working conditions that challenged their ability to provide patient-centered services. Patients sought favored relationships with health workers to help them navigate the health care system, but this undermined the sense of fairness. Both patients and health workers described frustration with lack of resources to assist patients in dire poverty, and health workers described great pressure to help patients from their "own pockets."

CONCLUSIONS

These concerns reflected the embeddedness of patient - provider interactions within a health system marked by scarcity, power dynamics between patients and health workers, and social stigma related to HIV. Reinforcing a respectful and welcoming atmosphere, timely service, privacy protection, and building patient perception of fairness in access to support could help to build patient satisfaction and care engagement in Haiti. Improving working conditions for health workers is also critical to achieving quality.

Systematic review: Development of a person-centered care framework within the context of HIV treatment settings in sub-Saharan Africa

Objectives

Person‐centred care (PCC) meets the needs of individuals by increasing convenience, providing supportive and culturally appropriate services to diverse populations, and engaging families, communities, and stakeholders in planning and provision of care. While the evidence demonstrates that PCC approaches can lead to clinical improvements across the HIV care continuum, it is not yet well defined in the context of HIV service delivery.

Methods

A systematic review was conducted to define PCC practices for HIV treatment services in health facilities in sub‐Saharan Africa. Data synthesis led to the development of a PCC framework including domain and sub‐domain development. The study team used the Effective Public Health Project Practice tool for quantitative studies to assess the quality of the included studies.

Results

Thirty‐one studies from 12 countries met the inclusion criteria, including 56,586 study participants (females 42%–100% and males 0%—58%), resulting in three major domains and 11 sub‐domains. These include staffing (sub‐domains of composition, availability, and competency); service delivery standards (sub‐domains of client feedback mechanisms; service efficiency and integration; convenience and access; and digital health worker support tools); and direct client support services (sub‐domains of psychosocial services, logistics support, client‐agency, and digital client support tools). Twenty‐five of the person‐centred interventions within these domains resulted in improvements in linkage to care, treatment retention, and/or viral suppression.

Conclusions

The PCC framework can help to provide a more consistent classification of HIV treatment interventions and will support improved assessment of these interventions to ensure that people receive personalised care.

Uptake of community‐ versus clinic‐based antiretroviral therapy dispensing in the Central Chronic Medication Dispensing and Distribution program in South Africa

Introduction

South Africa's government‐led Central Chronic Medication Dispensing and Distribution (CCMDD) program offers people living with HIV the option to collect antiretroviral therapy at their choice of community‐ or clinic‐based pick‐up points intended to increase convenience and decongest clinics. To understand CCMDD pick‐up point use among people living with HIV, we evaluated factors associated with uptake of a community‐ versus clinic‐based pick‐up point at CCMDD enrolment.

Methods

We collected baseline data from October 2018 to March 2020 on adults (≥18 years) who met CCMDD clinical eligibility criteria (non‐pregnant, on antiretroviral therapy for ≥1 year and virologically suppressed) as part of an observational cohort in seven public clinics in KwaZulu‐Natal. We identified factors associated with community‐based pick‐up point uptake and fit a multivariable logistic regression model, including age, gender, employment status, self‐perceived barriers to care, self‐efficacy, HIV‐related discrimination, and perceived benefits and challenges of CCMDD.

Results and Discussion

Among 1521 participants, 67% were females, with median age 36 years (IQR 30–44). Uptake of a community‐based pick‐up point was associated with younger age (aOR 1.18 per 10‐year decrease, 95% CI 1.05–1.33), being employed ≥40 hours per week (aOR 1.42, 95% CI 1.10–1.83) versus being unemployed, no self‐perceived barriers to care (aOR 1.42, 95% CI 1.09–1.86) and scoring between 36 and 39 (aOR 1.44, 95% CI 1.03–2.01) or 40 (aOR 1.91, 95% CI 1.39–2.63) versus 10–35 on the self‐efficacy scale, where higher scores indicate greater self‐efficacy. Additional factors included more convenient pick‐up point location (aOR 2.32, 95% CI 1.77–3.04) or hours (aOR 5.09, 95% CI 3.71–6.98) as perceived benefits of CCMDD, and lack of in‐clinic follow‐up after a missed collection date as a perceived challenge of CCMDD (aOR 4.37, 95% CI 2.30–8.31).

Conclusions

Uptake of community‐based pick‐up was associated with younger age, full‐time employment, and systemic and structural factors of living with HIV (no self‐perceived barriers to care and high self‐efficacy), as well as perceptions of CCMDD (convenient pick‐up point location and hours, lack of in‐clinic follow‐up). Strategies to facilitate community‐based pick‐up point uptake should be tailored to patients’ age, employment, self‐perceived barriers to care and self‐efficacy to maximize the impact of CCMDD in decongesting clinics.

Patient preferences for HIV service delivery models; a Discrete Choice Experiment in Kisumu, Kenya

Novel "differentiated service delivery" models for HIV treatment that reduce clinic visit frequency, minimize waiting time, and deliver treatment in the community promise retention improvement for HIV treatment in Sub-Saharan Africa. Quantitative assessments of differentiated service delivery (DSD) feature most preferred by patient populations do not widely exist but could inform selection and prioritization of different DSD models. We used a discrete choice experiment (DCE) to elicit patient preferences of HIV treatment services and how they differ across DSD models. We surveyed 18+year-olds, enrolled in HIV care for ≥6 months between February-March, 2019 at four facilities in Kisumu County, Kenya. DCE offered patients a series of comparisons between three treatment models, each varying across seven attributes: ART refill location, quantity of dispensed ART at each refill, medication pick-up hours, type of adherence support, clinical visit frequency, staff attitude, and professional cadre of person providing ART refills. We used hierarchical Bayesian model to estimate attribute importance and relative desirability of care characteristics, latent class analysis (LCA) for groups of preferences and mixed logit model for willingness to trade analysis. Of 242 patients, 128 (53.8%) were females and 150 (62.8%) lived in rural areas. Patients placed greatest importance on ART refill location [19.5% (95% CI 18.4, 10.6) and adherence support [19.5% (95% CI 18.17, 20.3)], followed by staff attitude [16.1% (95% CI 15.1, 17.2)]. In the mixed logit, patients preferred nice attitude of staff (coefficient = 1.60), refill ART health center (Coeff = 1.58) and individual adherence support (Coeff = 1.54), 3 or 6 months for ART refill (Coeff = 0.95 and 0.80, respectively) and pharmacists (instead of lay health workers) providing ART refill (Coeff = 0.64). No differences were observed by gender or urbanicity. LCA revealed two distinct groups (59.5% vs. 40.5%). Participants preferred 3 to 6-month refill interval or clinic visit spacing, which DSD offers stable patients. While DSD has encouraged community ART group options, our results suggest strong preferences for ART refills from health-centers or pharmacists over lay-caregivers or community members. These preferences held across gender&urban/rural subpopulations.

Differentiated service delivery models among PLHIV in Akwa Ibom and Cross River States, Nigeria during the COVID-19 pandemic: descriptive analysis of programmatic data

Introduction

The rapid increase in the number of people living with HIV (PLHIV) on antiretroviral therapy (ART) in Akwa Ibom and Cross River states in Nigeria led to overcrowding at clinics. Patients were devolved to receive ART refills through five differentiated service delivery (DSD) models: fast‐track (FT), adolescent refill clubs (ARCs), community pharmacy ART refill programs (CPARPs), community ART refill clubs (CARCs) and community ART refill groups (CARGs) designed to meet the needs of different groups of PLHIV. In the context of COVID‐19‐related travel restrictions, out‐of‐facility models offered critical mechanisms for continuity of treatment. We compared retention and viral suppression among those devolved to DSD with those who continued standard care at facilities.

Methods

A retrospective cohort study was conducted among patients devolved to DSD from January 2018 to December 2020. Bivariate analyses were conducted to assess differences in retention and viral suppression by socio‐demographic characteristics. Kaplan–Meier assessed retention at 3, 6, 9 and 12 months. Differences in proportions were compared using the chi‐square test; a p‐value of <0.05 was considered significant.

Results

A total of 40,800 PLHIV from 84 facilities received ART through the five models: CARC (53%), FT (19.1%), ARC (12.1%), CPARP (10.4%) and CARG (5.4%). Retention rates at 6 months exceeded 96% for all models compared to 94% among those continuing standard care. Among those using DSD, retention rate at 12 months was higher among adults than children (97.8% vs. 96.7%, p = 0.04). No significant sex differences in retention rates were found among those enrolled in DSD. Viral suppression rates among PLHIV served through DSD were significantly higher among adults than children (95.4% vs. 89.2%; p <0.01). Among adults, 95.4% enrolled in DSD were virally suppressed compared to 91.8% of those in standard care (p <0.01). For children, 89.2% enrolled in DSD were virally suppressed compared to 83.2% in standard care (p <0.01).

Conclusions

PLHIV receiving ART through DSD models had retention but higher viral suppression rates compared to those receiving standard care. Expanding DSD during COVID‐19 has helped ensure uninterrupted access to ART in Nigeria. Further scale‐up is warranted to decongest facilities and improve clinical outcomes.

Patients' preferences for antiretroviral therapy service provision: a systematic review

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.