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Olawepo JO, O'Brien K, Papasodoro J, Coombs PE, Singh N, Gupta S, Bhan A, Olakunde BO, Ezeanolue EE. Retention in Care Among People Living with HIV in Nigeria: A Systematic Review and Meta-analysis. J Res Health Sci 2024; 24:e00618. [PMID: 39311101 PMCID: PMC11380731 DOI: 10.34172/jrhs.2024.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/18/2024] [Accepted: 04/06/2024] [Indexed: 09/27/2024] Open
Abstract
BACKGROUND In 2021, Nigeria had an estimated 1.9 million people living with the human immunodeficiency virus (PLHIV) and 1.7 million (90%) on antiretroviral therapy (ART). Study Design: A systematic review and meta-analysis. METHODS This meta-analysis followed the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) 2020 guidelines. We searched PubMed, Embase, PsychINFO, CINAHL, Global Index Medicus, and Cochrane Library. Studies were included if they reported on ART retention in care among PLHIV in Nigeria. The random-effects meta-analyses were used to combine the studies that had complete retention data. The I2 statistic was used to assess the heterogeneity of the studies. A sensitivity analysis was then done by conducting a leave-one-out analysis. Afterward, data were analyzed using STATA version 18. RESULTS The search yielded 966 unique articles, of which 52 studies met the inclusion criteria for the meta-analysis, and four experimental studies were split into their component arms. The total number of study participants was 563,410, and the pooled retention rate was 72% (95% CI: 67%, 76%; I2=99.9%; n=57). Sub-analysis showed that the Southeast region of Nigeria had the highest retention of 86% (95% CI: 78%, 92%), and the South-South had the lowest retention (58%; 95% CI: 38%, 79%). CONCLUSION In Nigeria, the pooled ART retention rate is less than optimal to achieve the UNAIDS goal of 95%, thus developing new models for ART retention is needed.
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Affiliation(s)
- John O. Olawepo
- Department of Health Sciences, Bouvé College of Health Sciences, Northeastern University, Boston, USA
- Center for Translation and Implementation Research (CTAIR), University of Nigeria, Enugu, Nigeria
| | - Katherine O'Brien
- Department of Health Sciences, Bouvé College of Health Sciences, Northeastern University, Boston, USA
| | - Julia Papasodoro
- Department of Health Sciences, Bouvé College of Health Sciences, Northeastern University, Boston, USA
| | - Philip E. Coombs
- Department of Research and Instruction, Northeastern University Library, Northeastern University, Boston, USA
| | - Neha Singh
- Department of Health Sciences, Bouvé College of Health Sciences, Northeastern University, Boston, USA
| | - Shubhi Gupta
- Department of Health Informatics, Khoury College of Computer Science, Bouvé College of Health Sciences, Northeastern University, Boston, USA
| | - Aarushi Bhan
- Department of Biology, College of Science, Northeastern University, Boston, MA, USA
| | - Babayemi O. Olakunde
- Center for Translation and Implementation Research (CTAIR), University of Nigeria, Enugu, Nigeria
- Department of Population and Community Health, University of North Texas Health Science Center, Fort Worth, Texas, USA
| | - Echezona E. Ezeanolue
- Center for Translation and Implementation Research (CTAIR), University of Nigeria, Enugu, Nigeria
- Healthy Sunrise Foundation, Las Vegas, Nevada, USA
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da Silva ASP, Amianti C, Bandeira LM, Júnior RB, Faccin GM, Motta-Castro ARC. Tracking People Living with HIV in Loss to Follow Up in Central Brazil: A Call for Attention to Health Services. AIDS Behav 2024; 28:2403-2409. [PMID: 38720109 DOI: 10.1007/s10461-024-04337-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/27/2024] [Indexed: 06/26/2024]
Abstract
Despite the effectiveness of antiretroviral therapy (ART), human immunodeficiency virus (HIV) infection remains a global public health concern. However, weaknesses in its management regarding access to integrated HIV care include treatment gaps and loss to follow-up (LTFU) from antiretroviral treatment (ART). This study aimed to characterize the epidemiological and clinical profiles of people living with HIV/AIDS (PLHA) in LTFU from HIV care in Campo Grande, Central Brazil. This retrospective cross-sectional study was conducted between January 2021 and April 2022 using secondary data from PLHA who had LTFU in Campo Grande. A total of 852 patients with PLHA were included in this study. The majority of participants in LTFU were male (63.1%), had a CD4 cell count > 200 cells/mm3 (68.2%), and had been treated for ≥ 3 months (86.4%). Only 287 (33.7%) participants had undetectable HIV viral load. Of the total number of patients who returned to treatment during the study period, 448 (54.3%) were LTFU-positive. The tracking strategy was not applied to 556 (65.26%) patients, and 44.4% of the participants had been in spontaneous demand. These results highlight the relevance of patient-centered interventions and the need to ensure early treatment and promote retention in care systems with consequent viral suppression, impacting the healthcare indicators of the population, with emphasis on health managers and stakeholders in HIV care.
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Affiliation(s)
| | - Carolina Amianti
- Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil.
| | | | - Roberto Braz Júnior
- Secretaria Municipal de Saúde de Campo Grande (SESAU), Campo Grande, MS, Brazil
| | | | - Ana Rita Coimbra Motta-Castro
- Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil
- Fiocruz Mato Grosso do Sul, Fundação Oswaldo Cruz/Ministério da Saúde, Campo Grande, Brazil
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Raberahona M, Rakotomalala R, Andriananja V, Andriamamonjisoa J, Rakotomijoro E, Andrianasolo RL, Rakotoarivelo RA, Randria MJDD. A retrospective cohort analysis of people living with HIV/AIDS enrolled in HIV care at a reference center in Antananarivo, Madagascar. Front Public Health 2024; 11:1329194. [PMID: 38288430 PMCID: PMC10822960 DOI: 10.3389/fpubh.2023.1329194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Accepted: 12/22/2023] [Indexed: 01/31/2024] Open
Abstract
Background The impact of the "Treat all" policy on the individual and in terms of public health is closely related to early diagnosis and retention in care. Patient-level data are scarce in Madagascar. In this study, we aimed to describe the profile of a cohort of newly diagnosed people living with HIV/AIDS (PLHIV), identify their outcomes, and assess factors associated with attrition from care and advanced HIV disease (AHD) at presentation. Methods We conducted a retrospective cohort study of PLHIV aged ≥15 years newly diagnosed at the University Hospital Joseph Raseta Befelatanana Antananarivo from 1 January 2010 to 31 December 2016. Results A total of 490 PLHIV were included in the cohort analysis. In total, 67.1% were male. The median age (interquartile range) at enrollment in care was 29 years (24-38). Overall, 36.1% of PLHIV were diagnosed with AHD at baseline. The proportion of patients with WHO stage IV at baseline increased significantly from 3.3% in 2010 to 31% in 2016 (p = 0.001 for trend). The probability of retention in care after the diagnosis at 12 months, 24 months, and 36 months was 71.8%, 65.5%, and 61.3%, respectively. Age ≥ 40 years (aHR: 1.55; 95% CI: 1.05-2.29; p = 0.026), low level of education (aHR:1.62; 95% CI: 1.11-2.36; p = 0,013), unspecified level of education (aHR:2.18; 95% CI: 1.37-3.47; p = 0.001) and unemployment (aHR:1.52; 95% CI: 1.07-2.16; p = 0.019) were independently associated with attrition from care. Factors associated with AHD at baseline were age ≥ 40 (aOR: 2.77; 95% CI: 1.38-5.57, p = 0.004), unspecified level of education (aOR: 3.80; 95% CI: 1.58-9.16, p = 0.003) and presence of clinical symptoms at baseline (aOR: 23.81; 95% CI: 10.7-52.98; p < 0.001). Sex workers were independently less likely to have an AHD at presentation (aOR: 0.23; 95% CI: 0.05-0.96, p = 0.044). Conclusion Sociodemographic determinants influenced retention in care more than clinical factors. The presence of clinical symptoms and sociodemographic determinants were the main factors associated with AHD at baseline.
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Affiliation(s)
- Mihaja Raberahona
- Department of Infectious Diseases, University Hospital Joseph Raseta Befelatanana Antananarivo, Antananarivo, Madagascar
- Faculty of Medicine, University of Antananarivo, Antananarivo, Madagascar
| | - Rado Rakotomalala
- Department of Infectious Diseases, University Hospital Joseph Raseta Befelatanana Antananarivo, Antananarivo, Madagascar
| | - Volatiana Andriananja
- Department of Infectious Diseases, University Hospital Joseph Raseta Befelatanana Antananarivo, Antananarivo, Madagascar
| | - Johary Andriamamonjisoa
- Department of Infectious Diseases, University Hospital Joseph Raseta Befelatanana Antananarivo, Antananarivo, Madagascar
| | - Etienne Rakotomijoro
- Department of Infectious Diseases, University Hospital Joseph Raseta Befelatanana Antananarivo, Antananarivo, Madagascar
| | | | - Rivonirina Andry Rakotoarivelo
- Department of Infectious Diseases, Faculty of Medicine, University Hospital Tambohobe Fianarantsoa, University of Fianarantsoa, Fianarantsoa, Madagascar
| | - Mamy Jean de Dieu Randria
- Department of Infectious Diseases, University Hospital Joseph Raseta Befelatanana Antananarivo, Antananarivo, Madagascar
- Faculty of Medicine, University of Antananarivo, Antananarivo, Madagascar
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Makurumidze R, Decroo T, Jacobs BKM, Rusakaniko S, Van Damme W, Lynen L, Gils T. Attrition one year after starting antiretroviral therapy before and after the programmatic implementation of HIV "Treat All" in Sub-Saharan Africa: a systematic review and meta-analysis. BMC Infect Dis 2023; 23:558. [PMID: 37641003 PMCID: PMC10463759 DOI: 10.1186/s12879-023-08551-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 08/21/2023] [Indexed: 08/31/2023] Open
Abstract
INTRODUCTION Evidence on the real-world effects of "Treat All" on attrition has not been systematically reviewed. We aimed to review existing literature to compare attrition 12 months after antiretroviral therapy (ART) initiation, before and after "Treat All" was implemented in Sub-Saharan Africa and describe predictors of attrition. METHODS We searched Embase, Google Scholar, PubMed, and Web of Science in July 2020 and created alerts up to the end of June 2023. We also searched for preprints and conference abstracts. Two co-authors screened and selected the articles. Risk of bias was assessed using the modified Newcastle-Ottawa Scale. We extracted and tabulated data on study characteristics, attrition 12 months after ART initiation, and predictors of attrition. We calculated a pooled risk ratio for attrition using random-effects meta-analysis. RESULTS Eight articles and one conference abstract (nine studies) out of 8179 screened records were included in the meta-analysis. The random-effects adjusted pooled risk ratio (RR) comparing attrition before and after "Treat All" 12 months after ART initiation was not significant [RR = 1.07 (95% Confidence interval (CI): 0.91-1.24)], with 92% heterogeneity (I2). Being a pregnant or breastfeeding woman, starting ART with advanced HIV, and starting ART within the same week were reported as risk factors for attrition both before and after "Treat All". CONCLUSIONS We found no significant difference in attrition before and after "Treat All" one year after ART initiation. While "Treat All" is being implemented widely, differentiated approaches to enhance retention should be prioritised for those subgroups at risk of attrition. PROSPERO NUMBER CRD42020191582 .
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Affiliation(s)
- Richard Makurumidze
- Institute of Tropical Medicine, Clinical Sciences Department, Antwerp, Belgium.
- Faculty of Medicine and Health Sciences, Department of Primary Health Care Sciences, University of Zimbabwe, Harare, Zimbabwe.
- Faculty of Medicine & Pharmacy, Gerontology, Vrije Universiteit Brussel (VUB), Brussels, Belgium.
| | - Tom Decroo
- Institute of Tropical Medicine, Clinical Sciences Department, Antwerp, Belgium
- Research Foundation of Flanders, Brussels, Belgium
| | - Bart K M Jacobs
- Institute of Tropical Medicine, Clinical Sciences Department, Antwerp, Belgium
| | - Simbarashe Rusakaniko
- Faculty of Medicine and Health Sciences, Department of Primary Health Care Sciences, University of Zimbabwe, Harare, Zimbabwe
| | - Wim Van Damme
- Institute of Tropical Medicine, Clinical Sciences Department, Antwerp, Belgium
- Faculty of Medicine & Pharmacy, Gerontology, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Lutgarde Lynen
- Institute of Tropical Medicine, Clinical Sciences Department, Antwerp, Belgium
| | - Tinne Gils
- Institute of Tropical Medicine, Clinical Sciences Department, Antwerp, Belgium
- Global Health Institute, University of Antwerp, Antwerp, Belgium
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Mayasi Ngongo N, Kamangu Ntambwe E, Situakibanza Nani-Tuma H, Mbula Mambimbi M, Mandina Ndona M, Longokolo Mashi M, Bepouka Izizag B, Lukiana T, Odio Ossam J, Mangala Sonzi D, Maes N, Moutschen M, El Moussaoui M, Darcis G. Human Immunodeficiency Virus Viral Load Monitoring and Rate of Virologic Suppression Among Patients Receiving Antiretroviral Therapy in Democratic Republic of the Congo, 2013-2020. Open Forum Infect Dis 2023; 10:ofad242. [PMID: 37363052 PMCID: PMC10287095 DOI: 10.1093/ofid/ofad242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 05/02/2023] [Indexed: 06/28/2023] Open
Abstract
Background Antiretroviral therapy (ART) expansion and viral load as a treatment monitoring approach have increased the demand for viral load testing. Many hurdles affect the coverage, quality, and use of viral load results. Estimates of viral load monitoring and viral suppression rates are needed to assess the performance of ART programs and improve human immunodeficiency virus (HIV) management outcomes. Methods People with HIV (PWH) viral load monitoring data were routinely collected in 84 health facilities in Kinshasa, Democratic Republic of the Congo (DRC), between 2013 and 2020. The number of PWH under ART, the number of participants with at least 1 viral load test result, the rate of viral suppression (defined as ≤1000 HIV ribonucleic acid copies per mL), and the mean turnaround time from sample collection to release of viral load test results were collected together with clinical data. Results A total of 14 057 PWH were included in the analysis. People with HIV were mainly enrolled after the "test and treat" implementation. The patients were followed for a median period of 27 months. The proportion of PWH with at least 1 available viral load largely increased in recent years. The delay from sample collection to release of viral load test results decreased overtime, from 35 days in 2018 to 16 days in 2020. Pregnancy and advanced HIV disease were associated with a lower chance of viral suppression. Conclusions There has been considerable success in increasing viral load access for all PWH under therapy in DRC. Nevertheless, viral load testing should be intensified with a particular effort to be made in groups at higher risk of viral failure.
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Affiliation(s)
- Nadine Mayasi Ngongo
- Correspondence: Gilles Darcis, MD, PhD, Avenue de l’hôpital 1, 4000 Liège, Belgium (); Nadine Mayasi Ngongo, MD, PhD, Avenue de l’hôpital 1, 4000 Liège, Belgium (nadiamayas02@gmail)
| | - Erick Kamangu Ntambwe
- Department of Molecular Biology of Basic Sciences, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Hippolyte Situakibanza Nani-Tuma
- Department of Internal Medicine, Infectious and Tropical Diseases, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Marcel Mbula Mambimbi
- Department of Internal Medicine, Infectious and Tropical Diseases, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Madone Mandina Ndona
- Department of Internal Medicine, Infectious and Tropical Diseases, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Murielle Longokolo Mashi
- Department of Internal Medicine, Infectious and Tropical Diseases, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Ben Bepouka Izizag
- Department of Internal Medicine, Infectious and Tropical Diseases, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Tuna Lukiana
- Department of Internal Medicine, Infectious and Tropical Diseases, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Jérôme Odio Ossam
- Department of Internal Medicine, Infectious and Tropical Diseases, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Donatien Mangala Sonzi
- Department of Internal Medicine, Infectious and Tropical Diseases, University Hospital of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Nathalie Maes
- Biostatistics and Research Method Center (B-STAT), University Hospital of Liège, Liège, Belgium
| | - Michel Moutschen
- Department of Internal Medicine and Infectious Diseases, Liège University Hospital, Liège, Belgium
- AIDS Reference Laboratory, University of Liège, Liège, Belgium
| | - Majdouline El Moussaoui
- Department of Internal Medicine and Infectious Diseases, Liège University Hospital, Liège, Belgium
| | - Gilles Darcis
- Correspondence: Gilles Darcis, MD, PhD, Avenue de l’hôpital 1, 4000 Liège, Belgium (); Nadine Mayasi Ngongo, MD, PhD, Avenue de l’hôpital 1, 4000 Liège, Belgium (nadiamayas02@gmail)
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Munyayi FK, van Wyk BE. Determinants and rates of retention in HIV care among adolescents receiving antiretroviral therapy in Windhoek, Namibia: a baseline cohort analysis. BMC Public Health 2023; 23:458. [PMID: 36890540 PMCID: PMC9994767 DOI: 10.1186/s12889-023-15356-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 03/01/2023] [Indexed: 03/10/2023] Open
Abstract
BACKGROUND Long-term engagement in HIV care is essential to achieving and maintaining viral suppression. Adolescents living with HIV (ALHIV) experience many barriers to remaining engaged in care and treatment programs. Higher attrition among adolescents compared to adults remains a huge concern due to unique psychosocial and health systems challenges adolescents face, and recently the COVID-19 pandemic effects. We report on determinants and rates of retention in care in adolescents aged 10-19 years enrolled on antiretroviral therapy (ART) in Windhoek, Namibia. METHODS A retrospective cohort analysis of routine clinical data of 695 adolescents aged 10-19 years enrolled for ART at 13 Windhoek district public healthcare facilities, between January 2019 and December 2021 was conducted. Anonymized patient data were extracted from an electronic database and registers. Bivariate and Cox proportional hazards analysis were performed to determine factors associated with retention in care among ALHIV at 6, 12, 18, 24 and 36 months. Retention in care trends were also described using the Kaplan-Meier survival analysis. RESULTS The retention in care rates at 6, 12, 18, 24 and 36 months were 97.7%, 94.1%, 92.4%, 90.2%, and 84.6%, respectively. Our study population had predominantly treatment-experienced adolescents, who initiated ART between birth and 9 years (73.5%), were on treatment for > 24 months (85.0%), and on first-line ART (93.1%). After controlling for confounders, the risk of dropping out of care was increased for older adolescents aged 15-19 years (aHR = 1.964, 95% CI 1.033-3.735); adolescents on switched ART regimens (Second line + Third line regimen) (aHR = 4.024, 95% CI 2.021-8.012); adolescents who initiated ART at 15-19 years (aHR = 2.179, 95%CI 1.100-4.316); and male adolescents receiving ART at a PHC clinic (aHR = 4.322, 1.332-14.024). Conversely, the risk of ALHIV dropping out of care decreased for adolescents whose TB screen results were negative (aHR = 0.215, 95% CI 0.095-0.489). CONCLUSION Retention in care rates among ALHIV in Windhoek do not meet the UNAIDS revised target of 95%. Gender-specific interventions are needed to keep male and older adolescents motivated and engaged in long-term care, and to promote adherence amongst those adolescents who were initiated on ART in late adolescence (15-19 years).
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Affiliation(s)
- Farai K. Munyayi
- School of Public Health, University of the Western Cape, Cape Town, South Africa
| | - Brian E. van Wyk
- School of Public Health, University of the Western Cape, Cape Town, South Africa
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Muhula SO, Gachohi J, Kombe Y, Karanja S. Six-Months Retention on Treatment and Attrition Risk Factors among People Living with HIV in Kibera Informal Settlement, Nairobi, Kenya. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:12657. [PMID: 36231957 PMCID: PMC9565028 DOI: 10.3390/ijerph191912657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/22/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
Early retention of patients on HIV treatment is vital in preventing new infections, reducing transmissions, preventing AIDS related deaths and achieving viral suppression. This study sought to determine the effectiveness of non-cash intervention (reminding HIV positive patients at every clinic visit that they stand to receive free T-shirts of their favorite football team or free Kiondos based on preference if they made it to the sixth month visit without missing a treatment appointment) and psychosocial support on retention during the first six months of HIV treatment. This unblinded randomized control trial was conducted at three health centers within the Kibera informal settlement in Nairobi, Kenya. Participants were randomly assigned to the intervention and control groups at a ratio of 1:1. Eligible participants were patients who newly tested HIV positive and enrolled for treatment at the study sites, were 18 years and older and were willing and able to provide informed consent to participate in the study. The primary outcome of interest was retention on treatment at six months. The overall retention on treatment at six months was 93%. Retention at six months among the intervention and control groups was 94% and 91%, respectively (aRR: 1.03; 95% CI: 0.98-1.09; p-value = 0.24). Attrition from treatment was significantly associated with being divorced, being single/never married, time to clinic, participant weight and being on other first line ART regimens other than TDF/3TC/DTG and TDF/3TC/EFV. Mortality and lost to follow-up rates were 1.6 and 13.5 per 100 person-years, respectively. The combination of non-cash incentives and psychosocial support did not improve retention during the first six months of HIV treatment. To reduce further attrition in the early stages of HIV treatment, innovative strategies are needed to reach divorced and not married/single patients earlier and support them to remain on treatment. Efforts should also be made to further decentralize ART treatment to reduce costs and time associated with travelling to and from hospitals.
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Affiliation(s)
- Samuel Opondo Muhula
- School of Public Health, Jomo Kenyatta University of Agriculture and Technology, Nairobi P.O. Box 62000-00200, Kenya
- Amref Health Africa, Nairobi P.O. Box 30125-00100, Kenya
| | - John Gachohi
- School of Public Health, Jomo Kenyatta University of Agriculture and Technology, Nairobi P.O. Box 62000-00200, Kenya
| | - Yeri Kombe
- Kenya Medical Research Institute, Nairobi P.O. Box 54840-00200, Kenya
| | - Simon Karanja
- School of Public Health, Jomo Kenyatta University of Agriculture and Technology, Nairobi P.O. Box 62000-00200, Kenya
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