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Song Y, Choi W, Shim E. Cost-Effectiveness of Human Papillomavirus Vaccination in the UK: Two Versus Single-Dose of Nonavalent HPV Vaccination. Am J Prev Med 2024; 67:231-240. [PMID: 38508425 DOI: 10.1016/j.amepre.2024.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 03/13/2024] [Accepted: 03/13/2024] [Indexed: 03/22/2024]
Abstract
INTRODUCTION The UK implemented a single-dose HPV vaccination policy in September 2023, aiming for sustained protection, better vaccine coverage, and reduced healthcare costs. This research assesses the cost-effectiveness of both one-dose and two-dose schedules from a healthcare perspective. METHODS Using an age-structured dynamic model, the study analyzed long-term health and economic outcomes of these two different vaccination approaches. It focused on the effects of vaccinating 12- to 13-year-olds with the 9-valent HPV vaccine in either single-dose or two-dose regimens from 2023 to 2093. The analysis, conducted in 2023-2024, explored different immunity durations (10, 30 years, or lifetime) and efficacy levels for the single-dose strategy. RESULTS The study indicated that in the UK, vaccinating 12- to 13-year-olds with a two-dose regimen is not considered cost-effective compared to the single-dose option, assumed to be 90% as effective for 10 years. The incremental cost-effectiveness ratios for two doses ranged from £230,903 to £1,082,916 per quality-adjusted life year (QALY), significantly exceeding the UK's £20,000/QALY willingness-to-pay threshold. Over 70 years, a switch from a two-dose to a single-dose vaccination schedule could potentially lead to savings of over £1,073 million in the healthcare system. Furthermore, the single-dose regimen was cost-effective compared to no vaccination, with an incremental cost-effectiveness ratio below £2,040/QALY. CONCLUSIONS The study affirms the cost-effectiveness of the UK's single-dose HPV vaccine, in sync with its September 2023 policy shift. The shift not only provides financial benefits but also simplifies vaccine administration, strategically reducing HPV's epidemiological and economic impacts.
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Affiliation(s)
- Youngji Song
- Department of Mathematics, Soongsil University, Seoul, Republic of Korea
| | - Wongyeong Choi
- Department of Mathematics, Soongsil University, Seoul, Republic of Korea
| | - Eunha Shim
- Department of Mathematics, Soongsil University, Seoul, Republic of Korea.
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Stuart RM, Cohen JA, Abeysuriya RG, Sanz-Leon P, Kerr CC, Rao D, Klein DJ. Inferring the natural history of HPV from global cancer registries: insights from a multi-country calibration. Sci Rep 2024; 14:15875. [PMID: 38982088 PMCID: PMC11233645 DOI: 10.1038/s41598-024-65842-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Accepted: 06/24/2024] [Indexed: 07/11/2024] Open
Abstract
Human papillomavirus (HPV) is the cause of almost all cases of cervical cancer, a disease that kills some 340,000 women per year. The timeline from initial infection with HPV to the onset of invasive cervical cancer spans decades, and observational studies of this process are limited to settings in which treatment of precancerous lesions was withheld or inadequate. Such studies have been critical for understanding the natural history of HPV. Modeling can shed additional insight on the natural history of HPV, especially across geographical settings with varying prevalence of factors known to affect the host-side immune response to HPV, such as HIV and tobacco use. In this study, we create models for the 30 most populous countries in Sub-Saharan Africa, each with country-specific demographic, and behavioral inputs. We found that it was not possible to fit the data if we assumed that the natural history parameters were exactly identical for all countries, even after accounting for demographic and behavioral differences, but that we could achieve a good fit with the addition of a single immunocompetence parameter for each country. Our results indicate that variation in host immune responses may play a role in explaining the differences in the burden of cervical cancer between countries, which in turn implies a greater need for more geographically diverse data collection to understand the natural history of HPV.
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Affiliation(s)
- Robyn M Stuart
- Gender Equality Division, Bill & Melinda Gates Foundation, Seattle, WA, USA.
| | - Jamie A Cohen
- Global Health Division, Institute for Disease Modeling, Bill & Melinda Gates Foundation, Seattle, WA, USA
| | | | - Paula Sanz-Leon
- Brain Modelling Group, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Cliff C Kerr
- Global Health Division, Institute for Disease Modeling, Bill & Melinda Gates Foundation, Seattle, WA, USA
| | - Darcy Rao
- Gender Equality Division, Bill & Melinda Gates Foundation, Seattle, WA, USA
| | - Daniel J Klein
- Global Health Division, Institute for Disease Modeling, Bill & Melinda Gates Foundation, Seattle, WA, USA
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Spencer JC, Spees LP, Biddell CB, Odebunmi OO, Ilyasova AA, Yanguela J, Lich KH, Mills SD, Higgins CR, Ozawa S, Wheeler SB. Inclusion of marginalized populations in HPV vaccine modeling: A systematic review. Prev Med 2024; 182:107941. [PMID: 38522627 PMCID: PMC11194695 DOI: 10.1016/j.ypmed.2024.107941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/26/2024] [Accepted: 03/21/2024] [Indexed: 03/26/2024]
Abstract
OBJECTIVE Models simulating the potential impacts of Human Papillomavirus (HPV) vaccine have been used globally to guide vaccination policies and programs. We sought to understand how and why marginalized populations have been incorporated into HPV vaccine simulation models. METHODS We conducted a systematic search of PubMed, CINAHL, Scopus, and Embase to identify studies using simulation models of HPV vaccination incorporating one or more marginalized population through stratification or subgroup analysis. We extracted data on study characteristics and described these overall and by included marginalized groups. RESULTS We identified 36 studies that met inclusion criteria, which modeled vaccination in 21 countries. Models included men who have sex with men (MSM; k = 16), stratification by HIV status (k = 9), race/ethnicity (k = 6), poverty (k = 5), rurality (k = 4), and female sex workers (k = 1). When evaluating for a marginalized group (k = 10), HPV vaccination was generally found to be cost-effective, including for MSM, individuals living with HIV, and rural populations. In studies evaluating equity in cancer prevention (k = 9), HPV vaccination generally advanced equity, but this was sensitive to differences in HPV vaccine uptake and use of absolute or relative measures of inequities. Only one study assessed the impact of an intervention promoting HPV vaccine uptake. DISCUSSION Incorporating marginalized populations into decision models can provide valuable insights to guide decision making and improve equity in cancer prevention. More research is needed to understand the equity impact of HPV vaccination on cancer outcomes among marginalized groups. Research should emphasize implementation - including identifying and evaluating specific interventions to increase HPV vaccine uptake.
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Affiliation(s)
- Jennifer C Spencer
- Department of Population Health, Dell Medical School, University of Texas at Austin, Austin, TX, United States of America.
| | - Lisa P Spees
- Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Caitlin B Biddell
- Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Olufeyisayo O Odebunmi
- Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Anna A Ilyasova
- School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Juan Yanguela
- Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Kristen Hassmiller Lich
- Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Sarah D Mills
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America; Department of Health Behavior, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Colleen R Higgins
- Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Sachiko Ozawa
- Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Stephanie B Wheeler
- Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America; Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
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Tran J, Hathaway CL, Broshkevitch CJ, Palanee-Phillips T, Barnabas RV, Rao DW, Sharma M. Cost-effectiveness of single-visit cervical cancer screening in KwaZulu-Natal, South Africa: a model-based analysis accounting for the HIV epidemic. Front Oncol 2024; 14:1382599. [PMID: 38720798 PMCID: PMC11077327 DOI: 10.3389/fonc.2024.1382599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 03/27/2024] [Indexed: 05/12/2024] Open
Abstract
Introduction Women living with human immunodeficiency virus (WLHIV) face elevated risks of human papillomavirus (HPV) acquisition and cervical cancer (CC). Coverage of CC screening and treatment remains low in low-and-middle-income settings, reflecting resource challenges and loss to follow-up with current strategies. We estimated the health and economic impact of alternative scalable CC screening strategies in KwaZulu-Natal, South Africa, a region with high burden of CC and HIV. Methods We parameterized a dynamic compartmental model of HPV and HIV transmission and CC natural history to KwaZulu-Natal. Over 100 years, we simulated the status quo of a multi-visit screening and treatment strategy with cytology and colposcopy triage (South African standard of care) and six single-visit comparator scenarios with varying: 1) screening strategy (HPV DNA testing alone, with genotyping, or with automated visual evaluation triage, a new high-performance technology), 2) screening frequency (once-per-lifetime for all women, or repeated every 5 years for WLHIV and twice for women without HIV), and 3) loss to follow-up for treatment. Using the Ministry of Health perspective, we estimated costs associated with HPV vaccination, screening, and pre-cancer, CC, and HIV treatment. We quantified CC cases, deaths, and disability-adjusted life-years (DALYs) averted for each scenario. We discounted costs (2022 US dollars) and outcomes at 3% annually and calculated incremental cost-effectiveness ratios (ICERs). Results We projected 69,294 new CC cases and 43,950 CC-related deaths in the status quo scenario. HPV DNA testing achieved the greatest improvement in health outcomes, averting 9.4% of cases and 9.0% of deaths with one-time screening and 37.1% and 35.1%, respectively, with repeat screening. Compared to the cost of the status quo ($12.79 billion), repeat screening using HPV DNA genotyping had the greatest increase in costs. Repeat screening with HPV DNA testing was the most effective strategy below the willingness to pay threshold (ICER: $3,194/DALY averted). One-time screening with HPV DNA testing was also an efficient strategy (ICER: $1,398/DALY averted). Conclusions Repeat single-visit screening with HPV DNA testing was the optimal strategy simulated. Single-visit strategies with increased frequency for WLHIV may be cost-effective in KwaZulu-Natal and similar settings with high HIV and HPV prevalence.
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Affiliation(s)
- Jacinda Tran
- The Comparative Health Outcomes, Policy, and Economics (CHOICE) Institute, Department of Pharmacy, University of Washington, Seattle, WA, United States
| | - Christine Lee Hathaway
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, United States
| | - Cara Jill Broshkevitch
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Thesla Palanee-Phillips
- Faculty of Health Sciences, Wits RHI, University of the Witwatersrand, Johannesburg, South Africa
- Department of Epidemiology, University of Washington, Seattle, WA, United States
| | - Ruanne Vanessa Barnabas
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, United States
- Division of Infectious Diseases, Department of Medicine, Harvard Medical School, Boston, MA, United States
| | - Darcy White Rao
- Department of Epidemiology, University of Washington, Seattle, WA, United States
| | - Monisha Sharma
- Department of Global Health, University of Washington, Seattle, WA, United States
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Peronace C, Cione E, Abrego-Guandique DM, Fazio MD, Panduri G, Caroleo MC, Cannataro R, Minchella P. FAM19A4 and hsa-miR124-2 Double Methylation as Screening for ASC-H- and CIN1 HPV-Positive Women. Pathogens 2024; 13:312. [PMID: 38668267 PMCID: PMC11054986 DOI: 10.3390/pathogens13040312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 04/04/2024] [Accepted: 04/09/2024] [Indexed: 04/29/2024] Open
Abstract
The DNA methylation levels of host cell genes increase with the severity of the cervical intraepithelial neoplasia (CIN) grade and are very high in cervical cancer. Our study aims to evaluate FAM19A4 and hsa-miR124-2 methylation in Atypical Squamous cells with high-grade squamous intraepithelial lesions (ASC-H) and in CIN1, defined as low-grade squamous intraepithelial lesions (LSILs) by the Bethesda classification, as possible early warning biomarkers for managing women with high-risk HPV infections (hrHPV). FAM19A4 and hsa-miR124-2 methylation tests were conducted on fifty-six cervical screening samples from a subset of women aged 30-64 years old. Specimens were collected into ThinPrep PreservCyt Solution. Their HrHPV genotype and cytology diagnosis were known. A Qiasure (Qiagen) was used for FAM19A4 and hsa-miR124-2 methylation testing on bisulfite-converted DNA, according to the manufacturer's specifications. The reported results were hypermethylation-positive or -negative. We found that FAM194A4 and hsa-miR124-2 methylation was detected in 75% of ASC-H cases with a persistent infection of hrHPV. A total of 60% of CIN1 lesions were found to be positive for methylation, and 83.3% were when the cytology was CIN2/3. In addition, as a novelty of this pilot study, we found that combined FAM19A4 and hsa-miR124-2 methylation positivity rates (both methylated) were associated with the HPV genotypes 16, 18, and 59 and covered 22 and 25% of ASC-H and CIN1 cases, respectively. The methylation of these two genes, in combination with HPV genotyping, can be used as an early warning biomarker in the management and follow-up of women with ASC-H and CIN1 to avoid their progression to cervical cancer.
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Affiliation(s)
- Cinzia Peronace
- Unit of Microbiology and Virology, PO Pugliese, AOU Renato Dulbecco, 88100 Catanzaro, Italy; (M.D.F.); (G.P.); (P.M.)
| | - Erika Cione
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, 87036 Rende (CS), Italy
- Galascreen Laboratories, University of Calabria, 87036 Rende (CS), Italy; (D.M.A.-G.); (M.C.C.); (R.C.)
| | - Diana Marisol Abrego-Guandique
- Galascreen Laboratories, University of Calabria, 87036 Rende (CS), Italy; (D.M.A.-G.); (M.C.C.); (R.C.)
- Department of Health Sciences, University of Magna Graecia, 88100 Catanzaro, Italy
| | - Marco De Fazio
- Unit of Microbiology and Virology, PO Pugliese, AOU Renato Dulbecco, 88100 Catanzaro, Italy; (M.D.F.); (G.P.); (P.M.)
| | - Giuseppina Panduri
- Unit of Microbiology and Virology, PO Pugliese, AOU Renato Dulbecco, 88100 Catanzaro, Italy; (M.D.F.); (G.P.); (P.M.)
| | - Maria Cristina Caroleo
- Galascreen Laboratories, University of Calabria, 87036 Rende (CS), Italy; (D.M.A.-G.); (M.C.C.); (R.C.)
- Department of Health Sciences, University of Magna Graecia, 88100 Catanzaro, Italy
| | - Roberto Cannataro
- Galascreen Laboratories, University of Calabria, 87036 Rende (CS), Italy; (D.M.A.-G.); (M.C.C.); (R.C.)
| | - Pasquale Minchella
- Unit of Microbiology and Virology, PO Pugliese, AOU Renato Dulbecco, 88100 Catanzaro, Italy; (M.D.F.); (G.P.); (P.M.)
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Marembo T, Fitzpatrick MB, Dube Mandishora RS. Human papillomavirus genotype distribution patterns in Zimbabwe; is the bivalent vaccine sufficient? Intervirology 2024; 67:000531347. [PMID: 38574482 PMCID: PMC11057445 DOI: 10.1159/000531347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Accepted: 05/12/2023] [Indexed: 04/06/2024] Open
Abstract
BACKGROUND Vaccination against Human papillomavirus (HPV) is the primary preventative strategy that has been shown to reduce the burden of HPV related diseases. Zimbabwe introduced the bivalent vaccine (HPV 16/18) in the vaccination program targeting prepubescent girls in 2018. This review is an analysis of the distribution of HPV genotypes from various studies conducted in Zimbabwe to ascertain the effectiveness of the bivalent vaccine and make recommendations for future HPV vaccine choices. SUMMARY Zimbabwean studies have mostly reported on cervical HPV in the urban areas. The most frequent HPV genotypes from cervical sites were 16, 18, 33, 35, 45, 56 and 58. These were identified from samples with normal cytology, pre-cancer and invasive cervical cancer. The few studies that have been done in rural areas reported HPV 35 as the most frequent cervicovaginal genotype. From the anal region of individuals reporting for routine screening, HPV 16, 18, 35 52 and 58 were the most frequent. A study on genital warts identified HPV 6, 11, 16, 40, 51and 54. In a study on children with recurrent respiratory papillomatosis (RRP), HPV 6 and 11 were the most common and HPV 35 was also identified in these children. There is no available published data on HPV distribution in head and neck cancers in Zimbabwe. KEY MESSAGES Given that 83% of cervical cancers in Zimbabwe are caused by HPV 16/18, the bivalent vaccine could cover a significant proportion of HPV related cervical cancer. The current limitation of the bivalent vaccine is its failure to prevent benign lesions such as genital warts and RRP or all cervical cancer cases in Zimbabwe. For the prevention of most HPV related conditions, the nonavalent vaccine would be the most appropriate option for the Zimbabwean population. Currently there is no vaccine that includes HPV 35, yet this genotype was frequently identified in HPV related diseases. Vaccine developers may need to consider HPV 35 when manufacturing the next generation HPV vaccines. Furthermore, boys should also be included in HPV vaccination programs to improve herd immunity, as well as prevent RRP and HPV-related head and neck cancers.
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Affiliation(s)
- Takudzwa Marembo
- Department of Medical Microbiology, Midlands State University Faculty of Medicine, Gweru, Zimbabwe
- Africa Centres for Disease Control and Prevention, African Union Commission, Addis Ababa, Ethiopia
| | | | - Racheal S. Dube Mandishora
- Department of Medical Microbiology, University of Zimbabwe College of Health Sciences, Harare, Zimbabwe
- Infections and Cancer Biology Group, International Agency for Research on Cancer-WHO, Lyon, France
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Zhao X, Gopalappa C. Joint modeling HIV and HPV using a new hybrid agent-based network and compartmental simulation technique. PLoS One 2023; 18:e0288141. [PMID: 37922306 PMCID: PMC10624270 DOI: 10.1371/journal.pone.0288141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 06/20/2023] [Indexed: 11/05/2023] Open
Abstract
Persons living with human immunodeficiency virus (HIV) have a disproportionately higher burden of human papillomavirus infection (HPV)-related cancers. Causal factors include both behavioral and biological. While pharmaceutical and care support interventions help address biological risk of coinfection, as social conditions are common drivers of behaviors, structural interventions are key part of behavioral interventions. Our objective is to develop a joint HIV-HPV model to evaluate the contribution of each factor, to subsequently inform intervention analyses. While compartmental modeling is sufficient for faster spreading HPV, network modeling is suitable for slower spreading HIV. However, using network modeling for jointly modeling HIV and HPV can generate computational complexities given their vastly varying disease epidemiology and disease burden across sub-population groups. We applied a recently developed mixed agent-based compartmental (MAC) simulation technique, which simulates persons with at least one slower spreading disease and their immediate contacts as agents in a network, and all other persons including those with faster spreading diseases in a compartmental model, with an evolving contact network algorithm maintaining the dynamics between the two models. We simulated HIV and HPV in the U.S. among heterosexual female, heterosexual male, and men who have sex with men (men only and men and women) (MSM), sub-populations that mix but have varying HIV burden, and cervical cancer among women. We conducted numerical analyses to evaluate the contribution of behavioral and biological factors to risk of cervical cancer among women with HIV. The model outputs for HIV, HPV, and cervical cancer compared well with surveillance estimates. Model estimates for relative prevalence of HPV (1.67 times) and relative incidence of cervical cancer (3.6 times), among women with HIV compared to women without, were also similar to that reported in observational studies in the literature. The fraction attributed to biological factors ranged from 22-38% for increased HPV prevalence and 80% for increased cervical cancer incidence, the remaining attributed to behavioral. The attribution of both behavioral and biological factors to increased HPV prevalence and cervical cancer incidence suggest the need for behavioral, structural, and pharmaceutical interventions. Validity of model results related to both individual and joint disease metrics serves as proof-of-concept of the MAC simulation technique. Understanding the contribution of behavioral and biological factors of risk helps inform interventions. Future work can expand the model to simulate sexual and care behaviors as functions of social conditions to jointly evaluate behavioral, structural, and pharmaceutical interventions for HIV and cervical cancer prevention.
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Affiliation(s)
- Xinmeng Zhao
- Department of Mechanical and Industrial Engineering, University of Massachusetts Amherst, Amherst, MA, United States of America
| | - Chaitra Gopalappa
- Department of Mechanical and Industrial Engineering, University of Massachusetts Amherst, Amherst, MA, United States of America
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Sy F, Berner-Rodoreda A, Asnake T, Getnet M, Amogne W, Bussmann H, Abera H, Bärnighausen T, Deckert A. Exploring computer-aided health decision-making on cervical cancer interventions through deliberative interviews in Ethiopia. NPJ Digit Med 2023; 6:68. [PMID: 37069432 PMCID: PMC10106317 DOI: 10.1038/s41746-023-00808-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 03/30/2023] [Indexed: 04/19/2023] Open
Abstract
Cervical cancer is a significant disease burden in Ethiopia. Mathematical models and computer simulations on disease dynamics can support effective resource allocation. The objectives of this work are (i) to explore the perspectives of health decision-makers on computer-aided predictions supporting cervical cancer interventions, (ii) to identify their information needs from these predictions, and (iii) their willingness to apply the results in their work. We conducted deliberative interviews with 15 health decision-makers and advisors in Ethiopia in autumn 2019. We analyze the data using a five steps framework approach drawing on thematic analysis and find that Ethiopian health decision-makers are willing to use computer-aided predictions in their decisions. Data on HPV prevalence and the cervical cancer burden are scarce but valued highly and decision-makers are particularly interested in the identification of local HPV hotspots. Data-driven mathematical models and computer simulations may increasingly influence health decision-making in Ethiopia.
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Affiliation(s)
- Frithjof Sy
- Heidelberg Institute of Global Health, University of Heidelberg, Heidelberg, Germany.
| | | | | | - Misrak Getnet
- Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Wondwossen Amogne
- Infectious Disease Department (TASH) Addis Ababa University, Addis Ababa, Ethiopia
| | - Hermann Bussmann
- Institute of Pathology, University of Heidelberg, Heidelberg, Germany
| | - Helen Abera
- Infectious Disease Department (TASH) Addis Ababa University, Addis Ababa, Ethiopia
| | - Till Bärnighausen
- Heidelberg Institute of Global Health, University of Heidelberg, Heidelberg, Germany
- Harvard Center for Population & Development Studies, Harvard University, Cambridge, MA, USA
- Africa Health Research Institute, KwaZulu-Natal, South Africa
| | - Andreas Deckert
- Heidelberg Institute of Global Health, University of Heidelberg, Heidelberg, Germany.
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You T, Zhao X, Hu S, Gao M, Liu Y, Zhang Y, Qiao Y, Jit M, Zhao F. Optimal allocation strategies for HPV vaccination introduction and expansion in China accommodated to different supply and dose schedule scenarios: A modelling study. EClinicalMedicine 2023; 56:101789. [PMID: 36618898 PMCID: PMC9813696 DOI: 10.1016/j.eclinm.2022.101789] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/22/2022] [Accepted: 11/30/2022] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND A key barrier to cervical cancer elimination in China is low human papillomavirus (HPV) vaccine uptake, which is limited by supply constraints, high prices, and restriction to two/three-dose schedule. We explored optimal vaccination strategies for maximizing health and economic benefits accommodated to different supply and dose schedules. METHODS We evaluated different HPV vaccine strategies under 4 scenarios with different assumptions about vaccine availability and dose schedules. Each strategy involved different vaccine types, target ages, and modes of delivery. We used a previously validated transmission model to assess the health impact (cervical cancer cases averted), efficiency (number of doses needed to be given to prevent one case of cervical cancer [NND]), and value for money (incremental cost-effectiveness ratio [ICER] and return on investment [ROI]) of different strategies in Chinese females over a 100-year time horizon. All costs are expressed in 2021 dollars. We adopted a societal perspective and discounted quality-adjusted life-years (QALYs), costs and benefits by 3% annually for cost-effectiveness analysis and ROI calculation. FINDINGS In a supply-constrained and on-label use scenario, compared with no vaccination, two-dose routine vaccination of 14-year-olds would be the optimal, cost-saving strategy for a future national program (NNDs: 150-220, net cost saving: $15 164 million-$22 034 million, ROIs: 7-14, depending on vaccine type). If the one-dose schedule recommended by WHO is permitted in China, then reallocating the second dose from the routine cohorts to add a catch-up vaccination at 20-year-olds would be the most efficient strategy (NNDs: 73-107), and would be cost-saving compared with routine one-dose vaccination only (net cost saving: $4127 million-$6035 million, ROIs: 19-37). When supply constraints are lifted, scaling up vaccination in older females to 26 years could further expand the health benefits and still be cost-saving compared to maintaining the optimal vaccination strategy in the supply-constrained context. INTERPRETATION Our study provides timely evidence for the current and future HPV vaccination strategy planning in China, and may also be of value to other countries with supply and dose restrictions. FUNDING Bill & Melinda Gates Foundation; CAMS Innovation Fund for Medical Sciences (CIFMS).
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Affiliation(s)
- Tingting You
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xuelian Zhao
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Shangying Hu
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Meng Gao
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yang Liu
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Yong Zhang
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Youlin Qiao
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Mark Jit
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, United Kingdom
- School of Public Health, University of Hong Kong, Hong Kong SAR, China
| | - Fanghui Zhao
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Corresponding author. 17 South Panjiayuan Lane, PO Box 2258, Beijing, 100021, China.
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Miti S, Shato T, Asante C, Baumann A, Chongwe G, Bobo PM, Silver MI, Hunleth JM. Leveraging health infrastructure to optimize HPV vaccination for adolescents in Zambia: Protocol for an implementation study. PLoS One 2023; 18:e0285031. [PMID: 37159471 PMCID: PMC10168569 DOI: 10.1371/journal.pone.0285031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 04/12/2023] [Indexed: 05/11/2023] Open
Abstract
BACKGROUND Cervical cancer is the leading cause of cancer death in Zambia, where HIV prevalence is also high (11.3%). HIV heightens the risk of developing and dying from cervical cancer. The human papillomavirus (HPV) vaccine can prevent 90% of cervical cancers, and in Zambia is recommended for adolescent girls ages 14-15 years, including those with HIV. Currently they mainly deliver HPV vaccination via school-based campaigns, which may exclude the most vulnerable adolescents-those out-of-school or who irregularly attend. Adolescents living with HIV (ALHIV) are more likely to have these vulnerabilities. Further, school-based campaigns are not tailored to the WHO-recommended HPV vaccination schedule for ALHIV (3 versus 2 doses). Integrating HPV vaccination into routine care in adolescent HIV clinics may ensure that ALHIV have access to vaccine at the WHO-recommended schedule. Such integration requires a multilevel approach, stakeholder engagement, and diversified implementation strategies, given known challenges of providing the HPV vaccine in LMICs, including Zambia. METHODS Our study aims to integrate HPV vaccination into routine care in adolescent HIV clinics. To achieve success, we will co-design a package of implementation strategies using a previously successful implementation research approach developed for cervical cancer prevention in LMICs: the Integrative Systems Praxis for Implementation Research (INSPIRE). INSPIRE is a novel, comprehensive approach to develop, implement, and evaluate implementation science efforts. Following key elements of INSPIRE, our specific aims are to: 1) Identify the unique multilevel contextual factors (barriers and facilitators) across HIV settings (rural, urban, peri-urban) that influence HPV vaccine uptake; 2) Use Implementation Mapping to translate stakeholder feedback and findings from Aim 1 into a package of implementation strategies to integrate HPV vaccine into HIV clinics; 3) Conduct a Hybrid Type 3 effectiveness-implementation trial to evaluate the package of multilevel implementation strategies for integrating HPV vaccine into HIV clinics. DISCUSSION Our research team has strong support, technical expertise, and resources (e.g., vaccines) from the Zambian Ministry of Health; and political will for scale-up. This stakeholder-based implementation model has the potential to be transported to HIV clinics across Zambia and serve as a model to address cancer prevention priorities for those with HIV in other LMICs. TRIAL REGISTRATION To be registered prior to Aim 3, when implementation strategies finalized.
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Affiliation(s)
- Sam Miti
- Arthur Davison Children's Hospital, Ndola, Zambia
- Tropical Diseases Research Center, Ndola, Zambia
| | - Thembekile Shato
- Division of Public Health Sciences, Department of Surgery, Washington University in St. Louis, St. Louis, Missouri, United States of America
- Implementation Science Center for Cancer Control and Prevention Research Center, Brown School, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Comfort Asante
- Tropical Diseases Research Center, Ndola, Zambia
- Ndola Teaching Hospital, Ndola, Zambia
| | - Ana Baumann
- Division of Public Health Sciences, Department of Surgery, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | | | | | - Michelle I Silver
- Division of Public Health Sciences, Department of Surgery, Washington University in St. Louis, St. Louis, Missouri, United States of America
| | - Jean M Hunleth
- Division of Public Health Sciences, Department of Surgery, Washington University in St. Louis, St. Louis, Missouri, United States of America
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Boily MC, Barnabas RV, Rönn MM, Bayer CJ, van Schalkwyk C, Soni N, Rao DW, Staadegaard L, Liu G, Silhol R, Brisson M, Johnson LF, Bloem P, Gottlieb S, Broutet N, Dalal S. Estimating the effect of HIV on cervical cancer elimination in South Africa: Comparative modelling of the impact of vaccination and screening. EClinicalMedicine 2022; 54:101754. [PMID: 36583170 PMCID: PMC9793279 DOI: 10.1016/j.eclinm.2022.101754] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 11/01/2022] [Accepted: 11/03/2022] [Indexed: 11/18/2022] Open
Abstract
Background In 2020, the World Health Organization (WHO) launched its initiative to eliminate cervical cancer as a public health problem. To inform global efforts for countries with high HIV and cervical cancer burden, we assessed the impact of human papillomavirus (HPV) vaccination and cervical cancer screening and treatment in South Africa, on cervical cancer and the potential for achieving elimination before 2120, considering faster HPV disease progression and higher cervical cancer risk among women living with HIV(WLHIV) and HIV interventions. Methods Three independent transmission-dynamic models simulating HIV and HPV infections and disease progression were used to predict the impact on cervical cancer incidence of three scenarios for all women: 1) girls' vaccination (9-14 years old), 2) girls' vaccination plus 1 lifetime cervical screen (at 35 years), and 3) girls' vaccination plus 2 lifetime cervical screens (at 35 and 45 years) and three enhanced scenarios for WLHIV: 4) vaccination of young WLHIV aged 15-24 years, 5) three-yearly cervical screening of WLHIV aged 15-49 years, or 6) both. Vaccination assumed 90% coverage and 100% lifetime protection with the nonavalent vaccine (against HPV-16/18/31/33/45/52/58). Cervical cancer screening assumed HPV testing with uptake increasing from 45% (2023), 70% (2030) to 90% (2045+). We also assumed that UNAIDS 90-90-90 HIV treatment and 70% male circumcision targets are reached by 2030. We examined three elimination thresholds: age-standardised cervical cancer incidence rates below 4 or 10 per 100,000 women-years, and >85% reduction in cervical cancer incidence rate. We conducted sensitivity analyses and presented the median age-standardised predictions of outcomes of the three models (minimum-maximum across models). Findings Girls' vaccination could reduce age-standardised cervical cancer incidence from a median of 47.6 (40.9-79.2) in 2020 to 4.5 (3.2-6.3) per 100,000 women-years by 2120, averting on average ∼4% and ∼46% of age-standardised cumulative cervical cancer cases over 25 and 100 years, respectively, compared to the basecase. Adding 2 lifetime screens helped achieve elimination over the century among all women (2120 cervical cancer incidence: 3.6 (1.9-3.6) per 100,000 women-years), but not among WLHIV (10.8 (5.3-11.6)), and averted more cumulative cancer cases overall (∼45% over 25 years and ∼61% over 100 years compared to basecase) than girls' vaccination alone. Adding three-yearly cervical screening among WLHIV (to girls' vaccination and 2 lifetime cervical screens) further reduced age-standardised cervical cancer incidence to 3.3 (1.8-3.6) per 100,000 women-years overall and to 5.2 (3.9-8.5) among WLHIV by 2120 and averted on average 12-13% additional cumulative cancer cases among all women and 21-24% among WLHIV than girls' vaccination and 2 lifetime cervical screens over 25 years or longer. Long-term vaccine protection and using the nonavalent vaccine was required for elimination. Interpretation High HPV vaccination coverage of girls and 2 lifetime cervical screens could eliminate cervical cancer among women overall in South Africa by the end of the century and substantially decrease cases among all women and WLHIV over the short and medium term. Cervical cancer elimination in WLHIV would likely require enhanced prevention strategies for WLHIV. Screening of WLHIV remains an important strategy to reduce incidence and alleviate disparities in cervical cancer burden between women with and without HIV, despite HIV interventions scale-up. Funding World Health Organization. National Cancer Institute, National Institutes of Health. MRC Centre for Global Infectious Disease Analysis, UK Medical Research Council. National Institute of Child Health and Human Development research. Cancer Association of South Africa. Canadian Institutes of Health Research and the Fonds de recherche du Québec - Santé research.
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Affiliation(s)
- Marie-Claude Boily
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Ruanne V. Barnabas
- Division of Infectious Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Minttu M. Rönn
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Cara J. Bayer
- Departments of Epidemiology and Global Health, University of Washington, Seattle, WA, USA
| | - Cari van Schalkwyk
- The South African Department of Science and Innovation/National Research Foundation Centre of Excellence in Epidemiological Modelling and Analysis, Stellenbosch University, Stellenbosch, South Africa
| | - Nirali Soni
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Darcy W. Rao
- Departments of Epidemiology and Global Health, University of Washington, Seattle, WA, USA
| | - Lisa Staadegaard
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Gui Liu
- Departments of Epidemiology and Global Health, University of Washington, Seattle, WA, USA
| | - Romain Silhol
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Marc Brisson
- Centre de Recherche du CHU de Québec, Québec, Canada
- Département de médecine sociale et préventive, Université Laval, Québec, Canada
| | - Leigh F. Johnson
- Centre for Infectious Disease Epidemiology and Research, University of Cape Town, Cape Town, South Africa
| | - Paul Bloem
- Department of Immunization, Vaccines and Biologicals, World Health Organization, Geneva, Switzerland
| | - Sami Gottlieb
- Department of Sexual and Reproductive Health and Research, World Health Organization, Geneva, Switzerland
| | - Nathalie Broutet
- Department of Sexual and Reproductive Health and Research, World Health Organization, Geneva, Switzerland
| | - Shona Dalal
- Department of Global HIV, Hepatitis and STIs Programmes, World Health Organization, Geneva, Switzerland
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12
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Iskandar R, Taghavi K, Low N, Bramer WM, Egger M, Rohner E. Mathematical Models for Evaluating Effectiveness and Cost-Effectiveness of Cervical Cancer Control Policies in Populations Including Women Living With Human Immunodeficiency Virus: A Scoping Review. Value Health Reg Issues 2022; 32:39-46. [PMID: 36063639 PMCID: PMC9979336 DOI: 10.1016/j.vhri.2022.07.001] [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] [Received: 02/04/2022] [Revised: 06/07/2022] [Accepted: 07/23/2022] [Indexed: 02/08/2023]
Abstract
OBJECTIVES Mathematical modeling is increasingly used to inform cervical cancer control policies, and model-based evaluations of such policies in women living with human immunodeficiency virus (HIV) are an emerging research area. We did a scoping review of published literature to identify research gaps and inform future work in this field. METHODS We systematically searched literature up to April 2022 and included mathematical modeling studies evaluating the effectiveness or cost-effectiveness of cervical cancer prevention strategies in populations including women living with HIV. We extracted information on prevention strategies and modeling approaches. RESULTS We screened 1504 records and included 22 studies, almost half of which focused on South Africa. We found substantial between-study heterogeneity in terms of strategies assessed and modeling approaches used. Fourteen studies evaluated cervical cancer screening strategies, 7 studies assessed human papillomavirus vaccination (with or without screening), and 1 study evaluated the impact of HIV control measures on cervical cancer incidence and mortality. Thirteen conducted cost-effectiveness analyses. Markov cohort state-transition models were used most commonly (n = 12). Most studies (n = 17) modeled the effect of HIV by creating HIV-related health states. Thirteen studies performed model calibration, but 11 did not report the calibration methods used. Only 1 study stated that model code was available upon request. CONCLUSIONS Few model-based evaluations of cervical cancer control strategies have specifically considered women living with HIV. Improvements in model transparency, by sharing information and making model code publicly available, could facilitate the utility of these evaluations for other high disease-burden countries, where they are needed for assisting policy makers.
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Affiliation(s)
- Rowan Iskandar
- Center of Excellence in Decision-Analytic Modeling and Health Economics Research, sitem-insel, Bern, Switzerland; Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland; Center for Evidence Synthesis in Health, Brown University School of Public Health, Providence, RI, USA
| | - Katayoun Taghavi
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Nicola Low
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Wichor M Bramer
- Medical Library, Erasmus MC, Erasmus University Medical Centre Rotterdam, Rotterdam, The Netherlands
| | - Matthias Egger
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland; Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, England, UK; Centre for Infectious Disease Epidemiology and Research, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
| | - Eliane Rohner
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland.
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13
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Rao DW, Bayer CJ, Liu G, Chikandiwa A, Sharma M, Hathaway CL, Tan N, Mugo N, Barnabas RV. Modelling cervical cancer elimination using single-visit screening and treatment strategies in the context of high HIV prevalence: estimates for KwaZulu-Natal, South Africa. J Int AIDS Soc 2022; 25:e26021. [PMID: 36225139 PMCID: PMC9557021 DOI: 10.1002/jia2.26021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 09/21/2022] [Indexed: 11/06/2022] Open
Abstract
INTRODUCTION In settings with high HIV prevalence, cervical cancer incidence rates are up to six-fold higher than the global average of 13.1 cases per 100,000 women-years. To inform strategies for global cervical cancer elimination, we used a dynamic transmission model to evaluate scalable screening and treatment strategies, accounting for HIV-associated cancer risks and weighing prevention gains against overtreatment. METHODS We developed a dynamic model of HIV-HPV co-infection and disease progression, which we calibrated to KwaZulu-Natal, South Africa. Our baseline scenario reflects the current practice of HPV vaccination with a multi-visit screening and treatment strategy involving cytology and colposcopy triage. We evaluated 13 comparator scenarios with increased vaccination coverage and one-time, two-time or repeat HIV-targeted cervical cancer screening with the following single-visit strategies: HPV DNA testing, HPV genotyping, automated visual evaluation (AVE) and HPV DNA with AVE triage. In all scenarios, HIV antiretroviral therapy, condom use and voluntary male medical circumcision continue at baseline levels. We simulated cancer incidence under each scenario from 2020 to 2120 using the 25 best-fitting parameter sets. We present the median and range of model output from these simulations to account for parameter uncertainty. RESULTS We estimate that cervical cancer incidence will decrease by 87% with the continuation of current cervical cancer and HIV prevention strategies, from an age-standardized rate per 100,000 women of 80.4 (range 58.2, 112.1) in 2020 to 10.7 (4.2, 29.9) in 2120. Scenarios scaling up vaccination and single-visit strategies resulted in near- and long-term gains. With repeat HIV-targeted screening, incidence rates were projected to be 29-34% lower in 2030 relative to the baseline scenario, and elimination (incidence <4/100,000) was achieved with HPV DNA testing in 2095 and with AVE in 2114. A strategy of HPV DNA with AVE triage optimized the tradeoff between cancer cases averted and overtreatment. CONCLUSIONS Single-visit screening strategies could avert a substantial burden of cervical cancer and accelerate progress towards elimination in settings with a high burden of HIV. Increasing the screening frequency among women with HIV and reducing loss-to-follow-up for treatment will be key components of a successful elimination strategy.
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Affiliation(s)
| | - Cara J. Bayer
- Department of EpidemiologyUniversity of North Carolina‐Chapel HillChapel HillNorth CarolinaUSA
| | - Gui Liu
- Department of Global HealthUniversity of WashingtonSeattleWashingtonUSA
| | - Admire Chikandiwa
- Wits RHI, Faculty of Health SciencesUniversity of the WitwatersrandJohannesburgSouth Africa
| | - Monisha Sharma
- Department of Global HealthUniversity of WashingtonSeattleWashingtonUSA
| | | | - Nicholas Tan
- Creighton University School of MedicinePhoenixArizonaUSA
| | - Nelly Mugo
- Department of Global HealthUniversity of WashingtonSeattleWashingtonUSA
- Kenya Medical Research InstituteNairobiKenya
| | - Ruanne V. Barnabas
- Massachusetts General HospitalBostonMassachusettsUSA
- Harvard Medical SchoolBostonMassachusettsUSA
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14
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Daniels V, Saxena K, Patterson-Lomba O, Gomez-Lievano A, Saah A, Luxembourg A, Velicer C, Chen YT, Elbasha E. Modeling the health and economic implications of adopting a 1-dose 9-valent human papillomavirus vaccination regimen in a high-income country setting: An analysis in the United Kingdom. Vaccine 2022; 40:2173-2183. [PMID: 35232593 DOI: 10.1016/j.vaccine.2022.02.067] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/19/2021] [Accepted: 02/18/2022] [Indexed: 02/07/2023]
Abstract
Although no human papillomavirus (HPV) vaccine is indicated for single-dose administration, some observational evidence suggests that a 1-dose regimen might reduce HPV infection risk to that achieved with 2 doses. This study estimated the potential health and economic outcomes associated with switching from a 2-dose HPV vaccination program for girls and boys aged 13-14 years to an off-label 9-valent (9vHPV), 1-dose regimen, accounting for the uncertainty of the effectiveness and durability of a single dose. A dynamic HPV transmission infection and disease model was adapted to the United Kingdom and included a probabilistic sensitivity analysis using estimated distributions for duration of protection of 1-dose and degree of protection of 1 relative to 2 doses. One-way sensitivity analyses of key inputs were performed. Outcomes included additional cancer and disease cases and the difference in net monetary benefit (NMB). The 1-dose program was predicted to result in 81,738 additional HPV-related cancer cases in males and females over 100 years compared to the 2-dose program, ranging from 36,673 to 134,347 additional cases (2.5% and 97.5% quantiles, respectively), and had a 7.8% probability of being cost-effective at the £20,000/quality-adjusted life years willingness-to-pay (WTP) threshold. In one-way sensitivity analyses, the number of additional cancer cases was sensitive to the median of the duration of protection distribution and coverage rates. The differences in NMBs were sensitive to the median of the duration of protection distribution, dose price and discount rate, but not coverage variations. Across sensitivity analyses, the probability of 1 dose being cost-effective vs 2 doses was < 50% at the standard WTP threshold. Adoption of a 1-dose 9vHPV vaccination program resulted in more vaccine-preventable HPV-related cancer and disease cases in males and females, introduced substantial uncertainty in health and economic outcomes, and had a low probability of being cost-effective compared to the 2-dose program.
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Affiliation(s)
- Vincent Daniels
- Merck & Co., Inc., 2000 Galloping Hill Rd, Kenilworth, NJ 07033, USA.
| | - Kunal Saxena
- Merck & Co., Inc., 2000 Galloping Hill Rd, Kenilworth, NJ 07033, USA.
| | | | | | - Alfred Saah
- Merck & Co., Inc., 2000 Galloping Hill Rd, Kenilworth, NJ 07033, USA.
| | - Alain Luxembourg
- Merck & Co., Inc., 2000 Galloping Hill Rd, Kenilworth, NJ 07033, USA.
| | - Christine Velicer
- Merck & Co., Inc., 2000 Galloping Hill Rd, Kenilworth, NJ 07033, USA.
| | - Ya-Ting Chen
- Merck & Co., Inc., 2000 Galloping Hill Rd, Kenilworth, NJ 07033, USA.
| | - Elamin Elbasha
- Merck & Co., Inc., 2000 Galloping Hill Rd, Kenilworth, NJ 07033, USA.
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15
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Liu G, Mugo NR, Bayer C, Rao DW, Onono M, Mgodi NM, Chirenje ZM, Njoroge BW, Tan N, Bukusi EA, Barnabas RV. Impact of catch-up human papillomavirus vaccination on cervical cancer incidence in Kenya: A mathematical modeling evaluation of HPV vaccination strategies in the context of moderate HIV prevalence. EClinicalMedicine 2022; 45:101306. [PMID: 35243272 PMCID: PMC8860915 DOI: 10.1016/j.eclinm.2022.101306] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 01/20/2022] [Accepted: 01/28/2022] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Cervical cancer incidence is high in Kenya due to HIV and limited access to cancer prevention services. Human papillomavirus (HPV) has been shown to increase HIV acquisition; however, the potential impact of HPV vaccination on HIV is unknown. We modeled the health impact of HPV vaccination in the context of the HIV epidemiology in Kenya. METHODS Using a validated compartmental transmission model of HIV and HPV set in Kenya, we evaluated five scenarios of nonavalent HPV vaccination: single-age-vaccination of 10-year-old girls at 90% coverage; multi-age-cohort (MAC) vaccination of 10-14-year-old girls at 90% coverage; MAC plus moderate-coverage (50%) catch-up vaccination of 15-24-year-old women; MAC plus high-coverage (80%) catch-up of 15-24-year-old women; and MAC plus catch-up of 15-44-year-old women at 80% coverage (HPV-FASTER). We compared cervical cancer incidence, HIV prevalence, and cumulative cervical cancer and HIV cases averted after 50 years to a baseline scenario without vaccination. In all scenarios, we assumed the UNAIDS 90-90-90 goal for HIV treatment is attained by 2030. FINDINGS In 2021, model-estimated cervical cancer incidence is 44/100,000 and HIV prevalence among women is 6·5%. In 2070, projected cancer incidence declines to 27/100,000 and HIV prevalence reaches 0·3% without vaccination. With single-age-vaccination, cancer incidence in 2070 is reduced by 68%, averting 64,529 cumulative cancer cases. MAC vaccination reduces cancer incidence by 75%, averting 206,115 cancer cases. Moderate and high-coverage catch-up and HPV-FASTER reduce cancer incidence by 80%, 82%, and 84%, averting 254,930, 278,690, and 326,968 cancer cases, respectively. In all scenarios, HIV prevalence in 2070 is reduced by a relative 8-11%, with 15,609-34,981 HIV cases averted after 50 years. INTERPRETATION HPV vaccination can substantially reduce cervical cancer incidence in Kenya in the next 50 years, particularly if women up to age 24 are vaccinated. HIV treatment scale-up can also alleviate cervical cancer burden. However, HPV vaccination has modest additional impact on HIV when antiretroviral therapy coverage is high. FUNDING National Institutes of Health, Bill and Melinda Gates Foundation.
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Affiliation(s)
- Gui Liu
- Department of Global Health, University of Washington, Seattle, USA
- Corresponding author: Gui Liu, Department of Global Health, University of Washington, 908 Jefferson St., Seattle, WA 98104
| | - Nelly R Mugo
- Department of Global Health, University of Washington, Seattle, USA
- Kenya Medical Research Institute, Nairobi, Kenya
| | - Cara Bayer
- Department of Global Health, University of Washington, Seattle, USA
| | - Darcy White Rao
- Department of Epidemiology, University of Washington, Seattle, USA
| | | | - Nyaradzo M Mgodi
- University of Zimbabwe Clinical Trials Research Centre, Harare, Zimbabwe
| | - Zvavahera M Chirenje
- Faculty of Medicine and Health Sciences, University of Zimbabwe, Harare, Zimbabwe
| | | | - Nicholas Tan
- Creighton University School of Medicine, Phoenix, USA
| | - Elizabeth A Bukusi
- Department of Global Health, University of Washington, Seattle, USA
- Kenya Medical Research Institute, Nairobi, Kenya
- Department of Obstetrics and Gynecology, University of Washington, Seattle, USA
| | - Ruanne V Barnabas
- Department of Global Health, University of Washington, Seattle, USA
- Department of Epidemiology, University of Washington, Seattle, USA
- Department of Obstetrics and Gynecology, University of Washington, Seattle, USA
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, USA
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16
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Ibrahim Khalil A, Mpunga T, Wei F, Baussano I, de Martel C, Bray F, Stelzle D, Dryden‐Peterson S, Jaquet A, Horner M, Awolude OA, Trejo MJ, Mudini W, Soliman AS, Sengayi‐Muchengeti M, Coghill AE, van Aardt MC, De Vuyst H, Hawes SE, Broutet N, Dalal S, Clifford GM. Age-specific burden of cervical cancer associated with HIV: A global analysis with a focus on sub-Saharan Africa. Int J Cancer 2022; 150:761-772. [PMID: 34626498 PMCID: PMC8732304 DOI: 10.1002/ijc.33841] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 09/01/2021] [Accepted: 09/16/2021] [Indexed: 01/28/2023]
Abstract
HIV substantially worsens human papillomavirus (HPV) carcinogenicity and contributes to an important population excess of cervical cancer, particularly in sub-Saharan Africa (SSA). We estimated HIV- and age-stratified cervical cancer burden at a country, regional and global level in 2020. Proportions of cervical cancer (a) diagnosed in women living with HIV (WLHIV), and (b) attributable to HIV, were calculated using age-specific estimates of HIV prevalence (UNAIDS) and relative risk. These proportions were validated against empirical data and applied to age-specific cervical cancer incidence (GLOBOCAN 2020). HIV was most important in SSA, where 24.9% of cervical cancers were diagnosed in WLHIV, and 20.4% were attributable to HIV (vs 1.3% and 1.1%, respectively, in the rest of the world). In all world regions, contribution of HIV to cervical cancer was far higher in younger women (as seen also in empirical series). For example, in Southern Africa, where more than half of cervical cancers were diagnosed in WLHIV, the HIV-attributable fraction decreased from 86% in women ≤34 years to only 12% in women ≥55 years. The absolute burden of HIV-attributable cervical cancer (approximately 28 000 cases globally) also shifted toward younger women: in Southern Africa, 63% of 5341 HIV-attributable cervical cancer occurred in women <45 years old, compared to only 17% of 6901 non-HIV-attributable cervical cancer. Improved quantification of cervical cancer burden by age and HIV status can inform cervical cancer prevention efforts in SSA, including prediction of the impact of WLHIV-targeted vs general population approaches to cervical screening, and impact of HIV prevention.
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Affiliation(s)
- Ahmadaye Ibrahim Khalil
- Early Detection, Prevention and Infections Branch, International Agency for Research on Cancer (IARC/WHO)LyonFrance
| | - Tharcisse Mpunga
- Butaro Cancer Centre of Excellence, Ministry of HealthButaroRwanda
| | - Feixue Wei
- Early Detection, Prevention and Infections Branch, International Agency for Research on Cancer (IARC/WHO)LyonFrance
| | - Iacopo Baussano
- Early Detection, Prevention and Infections Branch, International Agency for Research on Cancer (IARC/WHO)LyonFrance
| | - Catherine de Martel
- Early Detection, Prevention and Infections Branch, International Agency for Research on Cancer (IARC/WHO)LyonFrance
| | - Freddie Bray
- Cancer Surveillance Branch, International Agency for Research on Cancer (IARC/WHO)LyonFrance
| | - Dominik Stelzle
- Center for Global Health, Department of Neurology, Faculty of MedicineTechnical University of MunichMunichGermany,Chair of Epidemiology, Department of Sport and Health SciencesTechnical University of MunichMunichGermany
| | - Scott Dryden‐Peterson
- Division of Infectious DiseasesBrigham and Women's HospitalBostonMassachusettsUSA,Department of Immunology and Infectious DiseasesHarvard T.H. Chan School of Public HealthBostonMassachusettsUSA,Botswana Harvard AIDS Institute PartnershipGaboroneBotswana
| | - Antoine Jaquet
- University of Bordeaux, Inserm, French National Research Institute for Sustainable Development (IRD), UMR 1219BordeauxFrance
| | - Marie‐Josèphe Horner
- Infections and Immunoepidemiology Branch, Division of Cancer Epidemiology and GeneticsNational Cancer InstituteBethesdaMarylandUSA
| | - Olutosin A. Awolude
- Department of Obstetrics and Gynaecology, College of MedicineUniversity of IbadanIbadanNigeria,Infectious Disease Institute, College of MedicineUniversity of IbadanIbadanNigeria
| | - Mario Jesus Trejo
- Department of Epidemiology and BiostatisticsUniversity of ArizonaTucsonArizonaUSA
| | - Washington Mudini
- Division of Anatomical Pathology, Faculty of Health SciencesUniversity of Cape TownCape TownSouth Africa
| | - Amr S. Soliman
- Community Health and Social Medicine Department, CUNY School of MedicineThe City College of New YorkNew York CityNew YorkUSA
| | - Mazvita Sengayi‐Muchengeti
- National Cancer Registry, National Health Laboratory ServiceJohannesburgSouth Africa,School of Public HealthUniversity of the WitwatersrandJohannesburgSouth Africa,South African DSI‐NRF Centre of Excellence in Epidemiological Modelling and Analysis (SACEMA)Stellenbosch UniversityStellenboschSouth Africa
| | - Anna E. Coghill
- Cancer Epidemiology Program, Division of Population ScienceH. Lee Moffitt Cancer Center and Research InstituteTampaFloridaUSA
| | - Matthys C. van Aardt
- Gynaecologic Oncology Unit, Department of Obstetrics and GynaecologyUniversity of PretoriaPretoriaSouth Africa
| | - Hugo De Vuyst
- Early Detection, Prevention and Infections Branch, International Agency for Research on Cancer (IARC/WHO)LyonFrance
| | - Stephen E. Hawes
- Departments of Epidemiology, Health Services, and Global HealthUniversity of WashingtonSeattleWashingtonUSA
| | - Nathalie Broutet
- Department of Sexual and Reproductive Health and Research, World Health OrganizationGenevaSwitzerland
| | - Shona Dalal
- Department of Global HIV, Hepatitis and STIs Programmes, World Health OrganizationGenevaSwitzerland
| | - Gary M. Clifford
- Early Detection, Prevention and Infections Branch, International Agency for Research on Cancer (IARC/WHO)LyonFrance
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Amponsah-Dacosta E, Blose N, Nkwinika VV, Chepkurui V. Human Papillomavirus Vaccination in South Africa: Programmatic Challenges and Opportunities for Integration With Other Adolescent Health Services? Front Public Health 2022; 10:799984. [PMID: 35174123 PMCID: PMC8841655 DOI: 10.3389/fpubh.2022.799984] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 01/07/2022] [Indexed: 12/17/2022] Open
Abstract
Compared to other regions of the world, sub-Saharan Africa has made limited progress in the implementation and performance of nationwide human papillomavirus (HPV) vaccination programmes. Without urgent intervention, this will serve to undermine cervical cancer elimination efforts in this region. The primary intent of this narrative review is to highlight the programmatic successes and challenges of the school-based HPV vaccination programme in South Africa since its inception in 2014, with the aim of contributing to the evidence base needed to accelerate implementation and improve programme performance in other sub-Saharan African countries. As of 2020, the proportion of adolescent girls aged 15 years who had received at least one dose of the HPV vaccine at any time between ages 9–14 years was 75%, while 61% had completed the full recommended two-dose schedule. This gives some indication of the reach of the South African HPV vaccination programme over the past 6 years. Despite this, vaccine coverage and dose completion rates have persistently followed a downward trend, slowing progress toward attaining global elimination targets. There is evidence suggesting that declining public demand for the HPV vaccine may be a result of weakening social mobilization over time, inadequate reminder and tracking systems, and vaccine hesitancy. Another concern is the disproportionate burden of HPV and HIV co-infections among adolescent girls and young women in South Africa, which predisposes them to early development of invasive cervical cancer. Moving forward, national policy makers and implementers will have to explore reforms to current age eligibility criteria and vaccine dose schedules, as well as implement strategies to support vaccine uptake among populations like out-of-school girls, girls attending private schools, and HIV positive young women. Additional opportunities to strengthen the South African HPV vaccination programme can be achieved by scaling up the co-delivery of other adolescent health services such as comprehensive sexual and reproductive health and rights education, deworming, and health screening. This calls for reinforcing implementation of the integrated school health policy and leveraging existing adolescent health programmes and initiatives in South Africa. Ultimately, establishing tailored, adolescent-centered, integrated health programmes will require guidance from further operational research.
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Affiliation(s)
- Edina Amponsah-Dacosta
- Vaccines for Africa Initiative, Faculty of Health Sciences, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
- *Correspondence: Edina Amponsah-Dacosta ;
| | - Ntombifuthi Blose
- Vaccines for Africa Initiative, Faculty of Health Sciences, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
- Division of Epidemiology and Biostatistics, Faculty of Health Sciences, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
| | - Varsetile Varster Nkwinika
- Department of Virological Pathology, Sefako Makgatho Health Sciences University, Pretoria, South Africa
- Department of Virological Pathology, South African Vaccination and Immunisation Centre (SAVIC), Sefako Makgatho Health Sciences University, Pretoria, South Africa
| | - Viola Chepkurui
- Vaccines for Africa Initiative, Faculty of Health Sciences, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
- Division of Epidemiology and Biostatistics, Faculty of Health Sciences, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa
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18
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Barnabas RV, Brown ER, Onono M, Bukusi EA, Njoroge B, Winer RL, Donnell D, Galloway D, Cherne S, Heller K, Leingang H, Morrison S, Rechkina E, McClelland RS, Baeten JM, Celum C, Mugo N. Single-dose HPV vaccination efficacy among adolescent girls and young women in Kenya (the KEN SHE Study): study protocol for a randomized controlled trial. Trials 2021; 22:661. [PMID: 34579786 PMCID: PMC8475401 DOI: 10.1186/s13063-021-05608-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 09/06/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND HPV infection is the primary cause of cervical cancer, a leading cause of cancer among women in Kenya and many sub-Saharan African countries. High coverage of HPV vaccination is a World Health Organization priority to eliminate cervical cancer globally, but vaccine supply and logistics limit widespread implementation of the current two or three dose HPV vaccine schedule. METHODS We are conducting an individual randomized controlled trial to evaluate whether a single dose of the bivalent (HPV 16/18) or nonavalent (HPV 16/18/31/33/45/52/58/6/11) HPV vaccine prevents persistent HPV infection, a surrogate marker for precancerous lesions and cervical cancer. The primary objective is to compare the efficacy of immediate, single-dose bivalent or nonavalent vaccination with delayed HPV vaccination. Kenyan women age 15-20 years old are randomized to immediate bivalent HPV and delayed meningococcal vaccine (group 1), immediate nonavalent HPV vaccine and delayed meningococcal vaccine (group 2), or immediate meningococcal vaccine and delayed HPV vaccine (group 3) with 36 months of follow-up. The primary outcome is persistent vaccine-type HPV infection by month 18 and by month 36 for the final durability outcome. The secondary objectives include to (1) evaluate non-inferiority of antibody titers among girls and adolescents (age 9 to 14 years) from another Tanzanian study, the DoRIS Study (NCT02834637), compared to KEN SHE Study participants; (2) assess the memory B cell immune response at months 36 and 37; and (3) estimate cost-effectiveness using the trial results and health economic models. DISCUSSION This study will evaluate single-dose HPV vaccine efficacy in Africa and has the potential to guide public health policy and increase HPV vaccine coverage. The secondary aims will assess generalizability of the trial results by evaluating immunobridging from younger ages, durability of the immune response, and the long-term health benefits and cost of single-dose HPV vaccine delivery. TRIAL REGISTRATION ClinicalTrials.gov NCT03675256 . Registered on September 18, 2018.
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Affiliation(s)
- Ruanne V Barnabas
- Department of Global Health, University of Washington, Seattle, USA. .,Division of Allergy and Infectious Diseases, University of Washington, Seattle, USA. .,Department of Epidemiology, University of Washington, Seattle, USA. .,Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, USA.
| | - Elizabeth R Brown
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, USA.,Department of Biostatistics, University of Washington, Seattle, USA.,Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, USA
| | | | - Elizabeth A Bukusi
- Department of Global Health, University of Washington, Seattle, USA.,Kenya Medical Research Institute, Nairobi, Kenya
| | | | - Rachel L Winer
- Department of Epidemiology, University of Washington, Seattle, USA
| | - Deborah Donnell
- Department of Global Health, University of Washington, Seattle, USA.,Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, USA.,Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, USA
| | - Denise Galloway
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, USA
| | - Stephen Cherne
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, USA
| | - Kate Heller
- Department of Global Health, University of Washington, Seattle, USA
| | - Hannah Leingang
- Department of Global Health, University of Washington, Seattle, USA
| | - Susan Morrison
- Department of Global Health, University of Washington, Seattle, USA
| | - Elena Rechkina
- Department of Global Health, University of Washington, Seattle, USA
| | - R Scott McClelland
- Department of Global Health, University of Washington, Seattle, USA.,Division of Allergy and Infectious Diseases, University of Washington, Seattle, USA.,Department of Epidemiology, University of Washington, Seattle, USA
| | - Jared M Baeten
- Department of Global Health, University of Washington, Seattle, USA.,Division of Allergy and Infectious Diseases, University of Washington, Seattle, USA.,Department of Epidemiology, University of Washington, Seattle, USA
| | - Connie Celum
- Department of Global Health, University of Washington, Seattle, USA.,Division of Allergy and Infectious Diseases, University of Washington, Seattle, USA.,Department of Epidemiology, University of Washington, Seattle, USA
| | - Nelly Mugo
- Department of Global Health, University of Washington, Seattle, USA.,Kenya Medical Research Institute, Nairobi, Kenya
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19
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van Schalkwyk C, Moodley J, Welte A, Johnson LF. Modelling the impact of prevention strategies on cervical cancer incidence in South Africa. Int J Cancer 2021; 149:1564-1575. [PMID: 34164807 DOI: 10.1002/ijc.33716] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/28/2021] [Accepted: 06/14/2021] [Indexed: 01/17/2023]
Abstract
In 2020, the World Health Organisation (WHO) published a strategy to eliminate cervical cancer as a public health concern. In South Africa, despite having a national screening policy in place since 2000, diagnosed cervical cancer incidence has shown no signs of decline. We extend a previously developed individual-based model for human immunodeficiency virus (HIV) and human papillomavirus (HPV) infection to include progression to cervical cancer. The model accounts for future reductions in HIV incidence and prevalence and includes a detailed cervical cancer screening algorithm, based on individual-level data from the public health sector. We estimate the impact of the current prevention programme and alternative screening scenarios on cervical cancer incidence. The South African screening programme prevented 8600 (95%CI 4700-12 300) cervical cancer cases between 2000 and 2019. At current levels of prevention (status quo vaccination, screening, and treatment), age-standardised cervical cancer incidence will reduce from 49.4 per 100 000 women (95%CI 36.6-67.2) in 2020, to 12.0 per 100 000 women (95%CI 8.0-17.2) in 2120. Reaching WHO's prevention targets by 2030 could help South Africa reach elimination (at the 10/100 000 threshold) by 2077 (94% probability of elimination by 2120). Using new screening technologies could reduce incidence to 4.7 per 100 000 women (95%CI 2.8-6.7) in 2120 (44% probability of elimination at the 4/100 000 threshold). HPV vaccination and decreasing HIV prevalence will substantially reduce cervical cancer incidence in the long term, but improvements to South Africa's current screening strategy will be required to prevent cases in the short term. Switching to new screening technologies will have the greatest impact.
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Affiliation(s)
- Cari van Schalkwyk
- The South African Department of Science and Innovation/National Research Foundation Centre of Excellence in Epidemiological Modelling and Analysis, Stellenbosch University, Stellenbosch, South Africa
| | - Jennifer Moodley
- Women's Health Research Unit, School of Public Health and Family Medicine, University of Cape Town, Cape Town, South Africa.,Cancer Research Initiative, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa.,South African Medical Research Council Gynaecology Cancer Research Centre, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Alex Welte
- The South African Department of Science and Innovation/National Research Foundation Centre of Excellence in Epidemiological Modelling and Analysis, Stellenbosch University, Stellenbosch, South Africa
| | - Leigh F Johnson
- Centre for Infectious Disease Epidemiology and Research, University of Cape Town, Cape Town, South Africa
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20
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Prevention of cervical cancer through two HPV-based screen-and-treat implementation models in Malawi: protocol for a cluster randomized feasibility trial. Pilot Feasibility Stud 2021; 7:98. [PMID: 33879259 PMCID: PMC8056631 DOI: 10.1186/s40814-021-00839-7] [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: 12/15/2020] [Accepted: 04/13/2021] [Indexed: 12/29/2022] Open
Abstract
Background Cervical cancer is the leading cause of cancer incidence and mortality among Malawian women, despite being a largely preventable disease. Implementing a cervical cancer screening and preventive treatment (CCSPT) program that utilizes rapid human papillomavirus (HPV) testing on self-collected cervicovaginal samples for screening and thermal ablation for treatment may achieve greater coverage than current programs that use visual inspection with acetic acid (VIA) for screening and cryotherapy for treatment. Furthermore, self-sampling creates the opportunity for community-based screening to increase uptake in populations with low screening rates. Malawi’s public health system utilizes regularly scheduled outreach and village-based clinics to provide routine health services like family planning. Cancer screening is not yet included in these community services. Incorporating self-sampled HPV testing into national policy could address cervical cancer screening barriers in Malawi, though at present the effectiveness, acceptability, appropriateness, feasibility, and cost-effectiveness still need to be demonstrated. Methods We designed a cluster randomized feasibility trial to determine the effectiveness, acceptability, appropriateness, feasibility, and budget impact of two models for integrating a HPV-based CCSPT program into family planning (FP) services in Malawi: model 1 involves only clinic-based self-sampled HPV testing, whereas model 2 includes both clinic-based and community-based self-sampled HPV testing. Our algorithm involves self-collection of samples for HPV GeneXpert® testing, visual inspection with acetic acid for HPV-positive women to determine ablative treatment eligibility, and same-day thermal ablation for treatment-eligible women. Interventions will be implemented at 14 selected facilities. Our primary outcome will be the uptake of cervical cancer screening and family planning services during the 18 months of implementation, which will be measured through an Endline Household Survey. We will also conduct mixed methods assessments to understand the acceptability, appropriateness, and feasibility of the interventions, and a cost analysis to assess budget impact. Discussion Our trial will provide in-depth information on the implementation of clinic-only and clinic-and-community models for integrating self-sampled HPV testing CCSPT with FP services in Malawi. Findings will provide valuable insight for policymakers and implementers in Malawi and other resource-limited settings with high cervical cancer burden. Trial registration ClinicalTrials.gov identifier: NCT04286243. Registered on February 26, 2020.
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21
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Secor AM, Driver M, Kharono B, Hergott D, Liu G, Barnabas RV, Dull P, Hawes SE, Drain PK. Immunogenicity of Alternative Dosing Schedules for HPV Vaccines among Adolescent Girls and Young Women: A Systematic Review and Meta-Analysis. Vaccines (Basel) 2020; 8:E618. [PMID: 33092049 PMCID: PMC7712330 DOI: 10.3390/vaccines8040618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/09/2020] [Accepted: 10/13/2020] [Indexed: 12/23/2022] Open
Abstract
Alternative dosing schedules for licensed human papilloma virus (HPV) vaccines, particularly single dose and extended intervals between doses (>12 months), are being considered to address vaccine shortages and improve operational flexibility. We searched PUBMED/MEDLINE for publications reporting immunogenicity data following administration of one of the licensed HPV vaccines (2vHPV, 4vHPV, and 9vHPV) to females aged 9-26 years. We conducted non-inferiority analyses comparing alternative to standard schedules using mixed effects meta-regression controlling for baseline HPV status and disaggregated by vaccine, subtype, time point, and age group (9-14 and 15-26 years). Non-inferiority was defined as the lower bound of the 95% confidence interval (CI) for the geometric mean titer (GMT) ratio being greater than 0.5. Our search returned 2464 studies, of which 23 were included in data analyses. When evaluated against standard schedules, although robust immunogenicity was demonstrated across all multi-dose groups, non-inferiority of extended interval dosing was mixed across vaccines, subtypes, and time points. Single dose did not meet the criteria for non-inferiority in any comparisons. Sparse data limited the number of possible comparisons, and further research is warranted.
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Affiliation(s)
- Andrew M. Secor
- START Center, University of Washington, Seattle, WA 98195, USA; (M.D.); (B.K.); (D.H.); (S.E.H.); (P.K.D.)
- Department of Global Health, University of Washington, Seattle, WA 98195, USA;
| | - Matthew Driver
- START Center, University of Washington, Seattle, WA 98195, USA; (M.D.); (B.K.); (D.H.); (S.E.H.); (P.K.D.)
- Department of Epidemiology, University of Washington, Seattle, WA 98195, USA;
| | - Brenda Kharono
- START Center, University of Washington, Seattle, WA 98195, USA; (M.D.); (B.K.); (D.H.); (S.E.H.); (P.K.D.)
- Department of Global Health, University of Washington, Seattle, WA 98195, USA;
| | - Dianna Hergott
- START Center, University of Washington, Seattle, WA 98195, USA; (M.D.); (B.K.); (D.H.); (S.E.H.); (P.K.D.)
- Department of Epidemiology, University of Washington, Seattle, WA 98195, USA;
| | - Gui Liu
- Department of Epidemiology, University of Washington, Seattle, WA 98195, USA;
| | - Ruanne V. Barnabas
- Department of Global Health, University of Washington, Seattle, WA 98195, USA;
- Department of Epidemiology, University of Washington, Seattle, WA 98195, USA;
- Department of Medicine, University of Washington, Seattle, WA 98195, USA
| | - Peter Dull
- Bill and Melinda Gates Foundation, Seattle, WA 98109, USA;
| | - Stephen E. Hawes
- START Center, University of Washington, Seattle, WA 98195, USA; (M.D.); (B.K.); (D.H.); (S.E.H.); (P.K.D.)
- Department of Global Health, University of Washington, Seattle, WA 98195, USA;
- Department of Epidemiology, University of Washington, Seattle, WA 98195, USA;
| | - Paul K. Drain
- START Center, University of Washington, Seattle, WA 98195, USA; (M.D.); (B.K.); (D.H.); (S.E.H.); (P.K.D.)
- Department of Global Health, University of Washington, Seattle, WA 98195, USA;
- Department of Medicine, University of Washington, Seattle, WA 98195, USA
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22
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Sindiani AM, Alshdaifat EH, Alkhatib AJ. Investigating Cervical Risk Factors that Lead to Cytological and Biopsy Examination. Med Arch 2020; 74:294-297. [PMID: 33041448 PMCID: PMC7520059 DOI: 10.5455/medarh.2020.74.294-297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Introduction: Cervical cancer ranks the fourth prevalent cancer in women at the global level, and the second in poor countries. The main objectives of the present study were to investigate the risk factors associated with cervical cancer and to study their possible association with the decision to take a cervical biopsy. Aim: The main objectives of this study were to investigate the risk factors associated with cervical cancer and to study their possible association with the decision to take a cervical biopsy. Methods: It was cross-sectional study and we analyzed an online data posted on Kaggle. This Dataset is obtained from UCI Repository. A list of risk factors for cervical cancer leading to biopsy examination was included, such as age, number of sexual partners, first sexual intercourse, number of pregnancies, smoking variables, hormonal contraceptives, IUD, and sexually transmitted disease variables, Hinselmann, Schiller, Cytology, and Biopsy. The dataset was prepared for appropriateness through filtering invalid cases with missing data. Results: The results of the study showed that the following variables were significantly associated with cytological examination: STD-Condylomotosis (p=0.035), STD-Pericondylomotosis (p=0.029), STD_HIV (p=0.006), Hinselmann (p<0.001), Schiller (p<0.001), and biopsy (p<0.001). the results also showed that the following variables were significantly associated with cytological examination. Conclusion: Taken together, cytological variables or biopsy examination variables if carried out at an early stage, lead to better diagnostic and therapeutic options.
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Affiliation(s)
- Amer Mahmoud Sindiani
- Department of Obstetrics and Gynecology, Faculty of Medicine, Jordan University of Science and Technology, Jordan
| | | | - Ahed J Alkhatib
- Department of Legal Medicine, Toxicology and Forensic Medicine, Jordan University of Science & Technology, Jordan
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The past, present and future impact of HIV prevention and control on HPV and cervical disease in Tanzania: A modelling study. PLoS One 2020; 15:e0231388. [PMID: 32374729 PMCID: PMC7202618 DOI: 10.1371/journal.pone.0231388] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 03/03/2020] [Indexed: 12/18/2022] Open
Abstract
Background Women with HIV have an elevated risk of HPV infection, and eventually, cervical cancer. Tanzania has a high burden of both HIV and cervical cancer, with an HIV prevalence of 5.5% in women in 2018, and a cervical cancer incidence rate among the highest globally, at 59.1 per 100,000 per year, and an estimated 9,772 cervical cancers diagnosed in 2018. We aimed to quantify the impact that interventions intended to control HIV have had and will have on cervical cancer in Tanzania over a period from 1995 to 2070. Methods A deterministic transmission-dynamic compartment model of HIV and HPV infection and natural history was used to simulate the impact of voluntary medical male circumcision (VMMC), anti-retroviral therapy (ART), and targeted pre-exposure prophylaxis (PrEP) on cervical cancer incidence and mortality from 1995–2070. Findings We estimate that VMMC has prevented 2,843 cervical cancer cases and 1,039 cervical cancer deaths from 1995–2020; by 2070 we predict that VMMC will have lowered cervical cancer incidence and mortality rates by 28% (55.11 cases per 100,000 women in 2070 without VMMC, compared to 39.93 with VMMC only) and 26% (37.31 deaths per 100,000 women in 2070 without VMMC compared to 27.72 with VMMC), respectively. We predict that ART will temporarily increase cervical cancer diagnoses and deaths, due to the removal of HIV death as a competing risk, but will ultimately further lower cervical cancer incidence and mortality rates by 7% (to 37.31 cases per 100,000 women in 2070) and 5% (to 26.44 deaths per 100,000 women in 2070), respectively, relative to a scenario with VMMC but no ART. A combination of ART and targeted PrEP use is anticipated to lower cervical cancer incidence and mortality rates to 35.82 and 25.35 cases and deaths, respectively, per 100,000 women in 2070. Conclusions HIV treatment and control measures in Tanzania will result in long-term reductions in cervical cancer incidence and mortality. Although, in the near term, the life-extending capability of ART will result in a temporary increase in cervical cancer rates, continued efforts towards HIV prevention will reduce cervical cancer incidence and mortality over the longer term. These findings are critical background to understanding the longer-term impact of achieving cervical cancer elimination targets in Tanzania.
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24
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Mapanga W, Singh E, Feresu SA, Girdler-Brown B. Treatment of pre- and confirmed cervical cancer in HIV-seropositive women from developing countries: a systematic review. Syst Rev 2020; 9:79. [PMID: 32276672 PMCID: PMC7149877 DOI: 10.1186/s13643-020-01345-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 03/30/2020] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Cervical cancer has become a major public health challenge in developing countries with a reported age-standardised incidence rate of about 17.9/100,000/year and lifetime risks approaching 1 in 20 in some settings. Evidence indicates that HIV-seropositive women are 2 to 12 times more likely to develop precancerous lesions that lead to cervical cancer than HIV-negative women. There is a lack of rigorous evidence on which treatment methods are being utilised for HIV-positive women, and this review aims to synthesise available evidence on treatment modalities for both cervical neoplasia and cervical cancer in HIV-seropositive women in developing countries. METHODS A systematic review guided by a published protocol was conducted. Online databases including MEDLINE/PubMed, Embase, CINAHL and Emerald (via EBSCOhost), PsycINFO, Cochrane Library, and health databases, which cover developing countries (3ie Systematic Reviews, WHO library and databases, World Bank website), were searched for published articles. Additional articles were found through citation, reference list tracking, and grey literature. Study design, treatment category, geographic country/region, and key outcomes for each included article were documented and summarised. RESULTS Thirteen research articles from sub-Saharan Africa, Asia, and South America were included. Eight (61.5%) articles focused on the treatment of cervical cancer with the remaining five (38.5%) assessed cervical neoplasia treatment. The available cervical cancer treatments, radiotherapy, chemotherapy, chemoradiation, and surgery are effective for HIV-seropositive patients, and these are the same treatments for HIV-negative patients. Both cryotherapy and LEEP are effective in reducing CIN2+ among HIV-seropositive women, and a choice between the treatments might be based on available resources and expertise. Radiation, chemotherapy, concurrent treatment using radiotherapy and chemotherapy, and surgery have shown the possibility of effectiveness among HIV-seropositive women. Cervical cancer stage, immunosuppressive level including those on HAART, and multisystem toxicities due to treatment are associated with treatment completion, prognostic, and survival outcomes. CONCLUSIONS Treatment of cervical cancer is based on the stage of cancer, and poor outcomes in most developing countries might be due to a lack of optimal treatment regimen. Those infected with HIV were younger and had advanced cervical cancer as compared to those who were HIV-negative. Facilitation and putting HIV-infected people on life-long ART is of importance and has been found to have a positive impact on cervical cancer treatment response. Research on precancerous lesions and cervical cancer management of HIV-seropositive patients focusing on the quality of life of those treated; the effectiveness of the treatment method considering CD4+ count and ART is required. SYSTEMATIC REVIEW REGISTRATION PROSPERO CRD42018095707.
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Affiliation(s)
- Witness Mapanga
- School of Health Systems and Public Health, Epidemiology & Biostatistics, University of Pretoria, 5-10 H.W. Snyman Building, Pretoria, South Africa.
- Non-Communicable Diseases Research (NCDR) Division of the Wits Health Consortium, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
- , Brooklyn, South Africa.
| | - Elvira Singh
- Cancer Epidemiology Research Group, National Cancer Registry, National Health Laboratory Service, Johannesburg, South Africa
- Community Medicine Unit, School of Public Health, University of the Witwatersrand, Johannesburg, South Africa
| | - Shingairai A Feresu
- Faculty of Health Sciences, The University of Fort Hare, P.O. Box 1054, 45 Church Street, Gasson Building, 7th Floor, East London, 5201, South Africa
| | - Brendan Girdler-Brown
- School of Health Systems and Public Health, Epidemiology & Biostatistics, University of Pretoria, 5-10 H.W. Snyman Building, Pretoria, South Africa
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Restivo V, Costantino C, Amato L, Candiloro S, Casuccio A, Maranto M, Marrella A, Palmeri S, Pizzo S, Vitale F, Amodio E. Evaluation of the Burden of HPV-Related Hospitalizations as a Useful Tool to Increase Awareness: 2007-2017 Data from the Sicilian Hospital Discharge Records. Vaccines (Basel) 2020; 8:vaccines8010047. [PMID: 31991909 PMCID: PMC7157634 DOI: 10.3390/vaccines8010047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 01/15/2020] [Accepted: 01/22/2020] [Indexed: 12/29/2022] Open
Abstract
In light of the implementation of human papillomavirus (HPV) prevention strategies, epidemiological studies in different geographical areas are required in order to assess the impact of HPV-related diseases. The purpose of the present study was to describe the burden of HPV-related hospitalizations in Sicily. A retrospective observational study estimated 43,531 hospitalizations attributable to HPV from 2007 to 2017. During the observed period, there was a decrease for all HPV-related conditions with a higher reduction, among neoplasms, for cervical cancer (annual percent change (APC) = −9.9%, p < 0.001). The median age for cervical cancer was 45 years old, with an increasing value from 43 to 47 years (p < 0.001). The age classes with greater decreases in hospital admissions for invasive cancers were women aged 35 years or more (APC range from −5.5 to −9.86) and 25–34 years old (APC = −11.87, p < 0.001) for women with cervical carcinoma in situ. After ten years for vaccine introduction and sixteen years for cervical cancer screening availability, a relatively large decrease in hospital admissions for cervical cancer and other HPV-related diseases in Sicily was observed. Some clinical characteristics of hospitalization, such as increasing age, are suggestive clues for the impact of preventive strategies, but further research is needed to confirm this relationship.
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Bobat R. Opportunistic Infections. HIV INFECTION IN CHILDREN AND ADOLESCENTS 2020. [PMCID: PMC7120925 DOI: 10.1007/978-3-030-35433-6_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Evolution in paediatric HIV management has changed the incidence and prevalence of opportunistic infections and a major reduction has been shown for most opportunistic infections with antiretroviral therapy use in lower and middle-income countries, especially in the first year of treatment. However, the high prevalence of disease still requires adequate management of opportunistic infections, to improve patient quality of life and the impact on burden of disease. Lower CD4 counts were associated with chronic infection and increased risk of opportunistic infections in patients, but some studies have shown that even children with high CD4 counts may have opportunistic infections. This chapter reviews common opportunistic infections that may infect HIV positive children and adolescents, particularly in sub Saharan Africa.
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Affiliation(s)
- Raziya Bobat
- Department of Paediatrics and Child Health, University of KwaZulu-Natal, Durban, KwaZulu-Natal South Africa
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Mahumud RA, Alam K, Dunn J, Gow J. The cost-effectiveness of controlling cervical cancer using a new 9-valent human papillomavirus vaccine among school-aged girls in Australia. PLoS One 2019; 14:e0223658. [PMID: 31596899 PMCID: PMC6785120 DOI: 10.1371/journal.pone.0223658] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 09/24/2019] [Indexed: 12/24/2022] Open
Abstract
INTRODUCTION Cervical cancer imposes a substantial health burden worldwide including in Australia and is caused by persistent infection with one of 13 sexually transmitted high-risk human papillomavirus (HPV) types. The objective of this study was to assess the cost-effectiveness of adding a nonavalent new Gardasil-9® (9vHPV) vaccine to the national immunisation schedule in Australia across three different delivery strategies. MATERIALS AND METHODS The Papillomavirus Rapid Interface for Modelling and Economics (PRIME) model was used to examine the cost-effectiveness of 9vHPV vaccine introduction to prevent HPV infection. Academic literature and anecdotal evidence were included on the demographic variables, cervical cancer incidence and mortality, treatment costs, and vaccine delivery costs. The incremental cost-effectiveness ratios (ICERs) were measured per disability-adjusted life years (DALYs) averted, using the heuristic cost-effectiveness threshold defined by the World Health Organisation (WHO). Analyses and data from international agencies were used in scenario analysis from the health system and societal perspectives. RESULTS The 9vHPV vaccination was estimated to prevent 113 new cases of cervical cancer (discounted) during a 20-year period. From the health system and societal perspectives, the 9vHPV vaccination was very cost-effective in comparison with the status quo, with an ICER of A$47,008 and A$44,678 per DALY averted, respectively, using the heuristic cost-effectiveness threshold level. Considering delivery strategies, the ICERs per DALY averted were A$47,605, A$46,682, and A$46,738 for school, health facilities, and outreach-based vaccination programs from the health system perspective, wherein, from the societal perspective, the ICERs per DALY averted were A$46,378, A$43,729, A$43,930, respectively. All estimates of ICERs fell below the threshold level (A$73,267). CONCLUSIONS This cost-effectiveness evaluation suggests that the routine two-dose 9vHPV vaccination strategy of preadolescent girls against HPV is very cost-effective in Australia from both the health system and societal perspectives. If equally priced, the 9vHPV option is the most economically viable vaccine. Overall, this analysis seeks to contribute to an evidence-based recommendation about the new 9vHPV vaccination in the national immunisation program in Australia.
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Affiliation(s)
- Rashidul Alam Mahumud
- Health Economics and Policy Research, Centre for Health, Informatics and Economic Research, University of Southern Queensland, Toowoomba, Queensland, Australia
- School of Commerce, University of Southern Queensland, Toowoomba, QLD Australia
- Health Economics Research, Health Systems and Population Studies Division, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
- Health and Epidemiology Research, Department of Statistics, University of Rajshahi, Rajshahi, Bangladesh
| | - Khorshed Alam
- Health Economics and Policy Research, Centre for Health, Informatics and Economic Research, University of Southern Queensland, Toowoomba, Queensland, Australia
- School of Commerce, University of Southern Queensland, Toowoomba, QLD Australia
| | - Jeff Dunn
- Health Economics and Policy Research, Centre for Health, Informatics and Economic Research, University of Southern Queensland, Toowoomba, Queensland, Australia
- Cancer Research Centre, Cancer Council Queensland, Fortitude Valley, QLD, Australia
- Prostate Cancer Foundation of Australia, St Leonards NSW, Australia
| | - Jeff Gow
- Health Economics and Policy Research, Centre for Health, Informatics and Economic Research, University of Southern Queensland, Toowoomba, Queensland, Australia
- School of Commerce, University of Southern Queensland, Toowoomba, QLD Australia
- School of Accounting, Economics and Finance, University of KwaZulu-Natal, Durban, South Africa
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Abstract
Cervical cancer is the fourth most common cancer in women, and the seventh overall, with an estimated 528,000 new cases and 266,000 deaths in 2012 [1]. Almost nine out of ten (87%) cervical cancer deaths occur in the less-developed regions of the world. The cervical cancer incidence significantly increases after 20 years of age and peaks at 50 years of age. Because cervical cancer mainly affects African women at a relatively young age, the socio-economic consequences are enormous. The human papillomavirus (HPV) is central to the development of cervical neoplasia and can be detected in 99.7% of cervical cancers. Hence primary prevention aims at reducing human papillomavirus (HPV) infection by HPV vaccine administration. Secondary prevention involves cervical cancer screening and management of precancerous lesions via either Pap smear, visual inspection with acetic acid (VIA) or with lugols iodine (VILI) or HPV testing for high-risk HPV types.
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Affiliation(s)
- Mamsau Ngoma
- Ocean Road Cancer Institute, PO Box 5408, Dar Es Salaam, Tanzania
| | - Philippe Autier
- International Prevention Research Institute, Espace Européen d'Ecully, Bâtiment G, Allée Claude Debussy, 69130 Ecully ouest Lyon, France
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