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Unger HW, Acharya S, Arnold L, Wu C, van Eijk AM, Gore-Langton GR, Ter Kuile FO, Lufele E, Chico RM, Price RN, Moore BR, Thriemer K, Rogerson SJ. The effect and control of malaria in pregnancy and lactating women in the Asia-Pacific region. Lancet Glob Health 2023; 11:e1805-e1818. [PMID: 37858590 DOI: 10.1016/s2214-109x(23)00415-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 08/10/2023] [Accepted: 08/23/2023] [Indexed: 10/21/2023]
Abstract
Half of all pregnancies at risk of malaria worldwide occur in the Asia-Pacific region, where Plasmodium falciparum and Plasmodium vivax co-exist. Despite substantial reductions in transmission, malaria remains an important cause of adverse health outcomes for mothers and offspring, including pre-eclampsia. Malaria transmission is heterogeneous, and infections are commonly subpatent and asymptomatic. High-grade antimalarial resistance poses a formidable challenge to malaria control in pregnancy in the region. Intermittent preventive treatment in pregnancy reduces infection risk in meso-endemic New Guinea, whereas screen-and-treat strategies will require more sensitive point-of-care tests to control malaria in pregnancy. In the first trimester, artemether-lumefantrine is approved, and safety data are accumulating for other artemisinin-based combinations. Safety of novel antimalarials to treat artemisinin-resistant P falciparum during pregnancy, and of 8-aminoquinolines during lactation, needs to be established. A more systematic approach to the prevention of malaria in pregnancy in the Asia-Pacific is required.
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Affiliation(s)
- Holger W Unger
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia; Department of Obstetrics and Gynaecology, Royal Darwin Hospital, Tiwi, NT, Australia; Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK.
| | - Sanjaya Acharya
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia
| | - Lachlan Arnold
- Royal Melbourne Hospital Clinical School, The University of Melbourne, Parkville, VIC, Australia
| | - Connie Wu
- Royal Melbourne Hospital Clinical School, The University of Melbourne, Parkville, VIC, Australia
| | - Anna Maria van Eijk
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Georgia R Gore-Langton
- Department of Disease Control, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Feiko O Ter Kuile
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Elvin Lufele
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia; Vector-Borne Diseases Unit, Papua New Guinea Institute of Medical Research, Madang, Papua New Guinea
| | - R Matthew Chico
- Department of Disease Control, Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Ric N Price
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia; Centre for Tropical Medicine, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK; Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Brioni R Moore
- Curtin Medical School, Curtin University, Bentley, WA, Australia; Curtin Health Innovation Research Institute, Curtin University, Bentley, WA, Australia; Telethon Kids Institute, Perth Children's Hospital, Nedlands, WA, Australia
| | - Kamala Thriemer
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, NT, Australia
| | - Stephen J Rogerson
- Department of Infectious Diseases, University of Melbourne, The Doherty Institute, Melbourne, VIC, Australia; Department of Medicine, University of Melbourne, The Doherty Institute, Melbourne, VIC, Australia
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Tan SX, Pumpalova Y, Rogers AM, Bhatt K, Herbst C, Ruff P, Neugut AI, Hur C. Cost-effectiveness of adjuvant chemotherapy for high-risk stage II and stage III colon cancer in South Africa. Cancer Med 2023; 12:15515-15529. [PMID: 37318753 PMCID: PMC10417185 DOI: 10.1002/cam4.6199] [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: 08/24/2022] [Revised: 03/30/2023] [Accepted: 05/23/2023] [Indexed: 06/16/2023] Open
Abstract
BACKGROUND Colon cancer incidence is rising in low- and middle-income countries (LMICs), where resource limitations and cost often dictate treatment decisions. In this study, we evaluate the cost-effectiveness of adjuvant chemotherapy for high-risk stage II and stage III colon cancer treatment in South Africa (ZA) and illustrate how such analyses can inform cancer treatment recommendations in a LMIC. METHODS We created a decision-analytic Markov model to compare lifetime costs and outcomes for patients with high-risk stage II and stage III colon cancer treated with three adjuvant chemotherapy regimens in a public hospital in ZA: capecitabine and oxaliplatin (CAPOX) for 3 and 6 months, and capecitabine for 6 months, compared to no adjuvant treatment. The primary outcome was the incremental cost-effectiveness ratio (ICER) in international dollars (I$) per disability-adjusted life-year (DALY) averted, at a willingness-to-pay (WTP) threshold equal to the 2021 ZA gross domestic product per capita (I$13,764/DALY averted). RESULTS CAPOX for 3 months was cost-effective for both patients with high-risk stage II and patients with stage III colon cancer (ICER = I$250/DALY averted and I$1042/DALY averted, respectively), compared to no adjuvant chemotherapy. In subgroup analyses of patients by tumor stage and number of positive lymph nodes, for patients with high-risk stage II colon cancer and T4 tumors, and patients with stage III colon cancer with T4 or N2 disease. CAPOX for 6 months was cost-effective and the optimal strategy. The optimal strategy in other settings will vary by local WTP thresholds. Decision analytic tools can be used to identify cost-effective cancer treatment strategies in resource-constrained settings. CONCLUSION Colon cancer incidence is increasing in low- and middle-income countries, including South Africa, where resource constraints can impact treatment decisions. This cost-effectiveness study evaluates three systemic adjuvant chemotherapy options, compared to surgery alone, for patients in South African public hospitals after surgical resection for high-risk stage II and stage III colon cancer. Doublet adjuvant chemotherapy (capecitabine and oxaliplatin) for 3 months is the cost-effective strategy and should be recommended in South Africa.
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Affiliation(s)
- Sarah Xinhui Tan
- Department of Medicine, Vagelos College of Physicians and SurgeonsColumbia UniversityNew YorkNew YorkUSA
| | - Yoanna Pumpalova
- Department of Medicine, Vagelos College of Physicians and SurgeonsColumbia UniversityNew YorkNew YorkUSA
| | - Alexandra M. Rogers
- Department of Medicine, Vagelos College of Physicians and SurgeonsColumbia UniversityNew YorkNew YorkUSA
| | - Kishan Bhatt
- Department of Medicine, Vagelos College of Physicians and SurgeonsColumbia UniversityNew YorkNew YorkUSA
| | - Candice‐lee Herbst
- Department of Internal Medicine, Faculty of Health SciencesUniversity of the WitwatersrandJohannesburgSouth Africa
| | - Paul Ruff
- Noncommunicable Diseases Research Division, Wits Health Consortium (PTY) LtdJohannesburgSouth Africa
- SAMRC/Wits Developmental Pathways to Health Research Unit, Department of Paediatrics, Faculty of the Health SciencesUniversity of the WitwatersrandJohannesburgSouth Africa
- Division of Medical Oncology, Department of Medicine, Faculty of Health SciencesUniversity of the WitwatersrandJohannesburgSouth Africa
| | - Alfred I. Neugut
- Department of Medicine, Vagelos College of Physicians and SurgeonsColumbia UniversityNew YorkNew YorkUSA
- Herbert Irving Comprehensive Cancer Center, Vagelos College of Physicians and SurgeonsColumbia UniversityNew YorkNew YorkUSA
- Department of Epidemiology, Mailman School of Public HealthColumbia UniversityNew YorkNew YorkUSA
| | - Chin Hur
- Department of Medicine, Vagelos College of Physicians and SurgeonsColumbia UniversityNew YorkNew YorkUSA
- Herbert Irving Comprehensive Cancer Center, Vagelos College of Physicians and SurgeonsColumbia UniversityNew YorkNew YorkUSA
- Department of Epidemiology, Mailman School of Public HealthColumbia UniversityNew YorkNew YorkUSA
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Pumpalova Y, Rogers AM, Tan SX, Herbst CL, Ruff P, Neugut AI, Hur C. Modeling the Cost-Effectiveness of Adjuvant Chemotherapy for Stage III Colon Cancer in South African Public Hospitals. JCO Glob Oncol 2021; 7:1730-1741. [PMID: 34936375 PMCID: PMC8710350 DOI: 10.1200/go.21.00279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE Cancer incidence is rising in low- and middle-income countries, where resource constraints often complicate therapeutic decisions. Here, we perform a cost-effectiveness analysis to identify the optimal adjuvant chemotherapy strategy for patients with stage III colon cancer treated in South African (ZA) public hospitals. METHODS A decision-analytic Markov model was developed to compare lifetime costs and outcomes for patients with stage III colon cancer treated with six adjuvant chemotherapy regimens in ZA public hospitals: fluorouracil, leucovorin, and oxaliplatin for 3 and 6 months; capecitabine and oxaliplatin (CAPOX) for 3 and 6 months; capecitabine for 6 months; and fluorouracil/leucovorin for 6 months. Transition probabilities were derived from clinical trials to estimate risks of toxicity, disease recurrence, and survival. Societal costs and utilities were obtained from literature. The primary outcome was the incremental cost-effectiveness ratio in international dollars (I$) per disability-adjusted life-year (DALY) averted, compared with no therapy, at a willingness-to-pay (WTP) threshold of I$13,006.56. RESULTS CAPOX for 3 months was cost-effective (I$5,381.17 and 5.74 DALYs averted) compared with no adjuvant chemotherapy. Fluorouracil, leucovorin, and oxaliplatin for 6 months was on the efficiency frontier with 5.91 DALYs averted but, with an incremental cost-effectiveness ratio of I$99,021.36/DALY averted, exceeded the WTP threshold. CONCLUSION In ZA public hospitals, CAPOX for 3 months is the cost-effective adjuvant treatment for stage III colon cancer. The optimal strategy in other settings may change according to local WTP thresholds. Decision analytic tools can play a vital role in selecting cost-effective cancer therapeutics in resource-constrained settings.
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Affiliation(s)
- Yoanna Pumpalova
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY
| | - Alexandra M Rogers
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY
| | - Sarah Xinhui Tan
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY
| | - Candice-Lee Herbst
- Department of Internal Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Paul Ruff
- Noncommunicable Diseases Research Division, Wits Health Consortium (PTY) Ltd, Johannesburg, South Africa.,SAMRC/Wits Developmental Pathways to Health Research Unit, Department of Paediatrics, Faculty of the Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.,Division of Medical Oncology, Department of Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Alfred I Neugut
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY.,Herbert Irving Comprehensive Cancer Center, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY.,Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY
| | - Chin Hur
- Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY.,Herbert Irving Comprehensive Cancer Center, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY.,Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY
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