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Kühl MJ, Gondwe T, Dhabangi A, Kwambai TK, Mori AT, Opoka R, John CC, Idro R, ter Kuile FO, Phiri KS, Robberstad B. Economic evaluation of postdischarge malaria chemoprevention in preschool children treated for severe anaemia in Malawi, Kenya, and Uganda: A cost-effectiveness analysis. EClinicalMedicine 2022; 52:101669. [PMID: 36313146 PMCID: PMC9596312 DOI: 10.1016/j.eclinm.2022.101669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 09/04/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Children hospitalised with severe anaemia in malaria-endemic areas are at a high risk of dying or being readmitted within six months of discharge. A trial in Kenya and Uganda showed that three months of postdischarge malaria chemoprevention (PDMC) with monthly dihydroartemisinin-piperaquine (DP) substantially reduced this risk. The World Health Organization recently included PDMC in its malaria chemoprevention guidelines. We conducted a cost-effectiveness analysis of community-based PDMC delivery (supplying all three PDMC-DP courses to caregivers at discharge to administer at home), facility-based PDMC delivery (monthly dispensing of PDMC-DP at the hospital), and the standard of care (no PDMC). METHODS We combined data from two recently completed trials; one placebo-controlled trial in Kenya and Uganda collecting efficacy data (May 6, 2016 until November 15, 2018; n=1049), and one delivery mechanism trial from Malawi collecting adherence data (March 24, 2016 until October 3, 2018; n=375). Cost data were collected alongside both trials. Three Markov decision models, one each for Malawi, Kenya, and Uganda, were used to compute incremental cost-effectiveness ratios expressed as costs per quality-adjusted life-year (QALY) gained. Deterministic and probabilistic sensitivity analyses were performed to account for uncertainty. FINDINGS Both PDMC strategies were cost-saving in each country, meaning less costly and more effective in increasing health-adjusted life expectancy than the standard of care. The estimated incremental cost savings for community-based PDMC compared to the standard of care were US$ 22·10 (Malawi), 38·52 (Kenya), and 26·23 (Uganda) per child treated. The incremental effectiveness gain using either PDMC strategy varied between 0·3 and 0·4 QALYs. Community-based PDMC was less costly and more effective than facility-based PDMC. These results remained robust in sensitivity analyses. INTERPRETATION PDMC under implementation conditions is cost-saving. Caregivers receiving PDMC at discharge is a cost-effective delivery strategy for implementation in malaria-endemic southeastern African settings. FUNDING Research Council of Norway.
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Affiliation(s)
- Melf-Jakob Kühl
- Centre for International Health (CIH), Department of Global Public Health and Primary Care, University of Bergen, Årstadveien 17, 5009 Bergen, Norway
- Health Economics Leadership and Translational Ethics Research Group (HELTER), Department of Global Public Health and Primary Care, University of Bergen, Årstadveien 17, 5009 Bergen, Norway
| | - Thandile Gondwe
- Kamuzu University of Health Sciences, 782 Mahatma Gandhi, Blantyre, Malawi
- Training and Research Unit of Excellence, 1 Kufa Road, Blantyre, Malawi
| | - Aggrey Dhabangi
- Makerere University College of Health Sciences, Upper Mulago Hill Road, Kampala, Uganda
| | - Titus K. Kwambai
- Centre for Global Health Research (CGHR), Kenya Medical Research Institute (KEMRI), Busia Rd, Kisumu, Kenya
- Department of Clinical Sciences, Liverpool School of Tropical Medicine (LSTM), Pembroke Place, Liverpool L3 5QA, United Kingdom
| | - Amani T. Mori
- Chr. Michelsen Institute, Jekteviksbakken 31, 5006 Bergen, Norway
- Health Economics Leadership and Translational Ethics Research Group (HELTER), Department of Global Public Health and Primary Care, University of Bergen, Årstadveien 17, 5009 Bergen, Norway
| | - Robert Opoka
- Makerere University College of Health Sciences, Upper Mulago Hill Road, Kampala, Uganda
| | - C. Chandy John
- Ryan White Center for Pediatric Infectious Diseases and Global Health, School of Medicine, Indiana University, 1044 W Walnut St, R4 402D Indianapolis, United States of America
| | - Richard Idro
- Makerere University College of Health Sciences, Upper Mulago Hill Road, Kampala, Uganda
| | - Feiko O. ter Kuile
- Department of Clinical Sciences, Liverpool School of Tropical Medicine (LSTM), Pembroke Place, Liverpool L3 5QA, United Kingdom
| | - Kamija S. Phiri
- Kamuzu University of Health Sciences, 782 Mahatma Gandhi, Blantyre, Malawi
- Training and Research Unit of Excellence, 1 Kufa Road, Blantyre, Malawi
| | - Bjarne Robberstad
- Health Economics Leadership and Translational Ethics Research Group (HELTER), Department of Global Public Health and Primary Care, University of Bergen, Årstadveien 17, 5009 Bergen, Norway
- Corresponding author at: Department of Global Public Health and Primary Care, University of Bergen, Årstadveien 17, 5009 Bergen, Norway.
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Kwambai TK, Mori AT, Nevitt S, van Eijk AM, Samuels AM, Robberstad B, Phiri KS, Ter Kuile FO. Post-discharge morbidity and mortality in children admitted with severe anaemia and other health conditions in malaria-endemic settings in Africa: a systematic review and meta-analysis. Lancet Child Adolesc Health 2022; 6:474-483. [PMID: 35605629 DOI: 10.1016/s2352-4642(22)00074-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/24/2022] [Accepted: 02/28/2022] [Indexed: 01/22/2023]
Abstract
BACKGROUND Severe anaemia is associated with high in-hospital mortality among young children. In malaria-endemic areas, surviving children also remain at increased risk of mortality for several months after hospital discharge. We aimed to compare the risks of morbidity and mortality among children discharged from hospital after recovery from severe anaemia versus other health conditions in malaria-endemic settings in Africa. METHODS Following PRISMA guidelines, we searched PubMed, Scopus, Web of Science, and Cochrane Central from inception to Nov 30, 2021, without language restrictions, for prospective or retrospective cohort studies and randomised controlled trials that followed up children younger than 15 years for defined periods after hospital discharge in malaria-endemic countries in Africa. We excluded the intervention groups in trials and studies or subgroups involving children with sickle cell anaemia, malignancies, or surgery or trauma, or those reporting follow-up data that were combined with the in-hospital period. Two independent reviewers extracted the data and assessed the quality and risk of bias using the Newcastle Ottawa Scale or the Cochrane Collaboration's tool. The coprimary outcomes were all-cause death and all-cause readmissions 6 months after discharge. This study is registered with PROSPERO, CRD42017079282. FINDINGS Of 2930 articles identified in our search, 27 studies were included. For children who were recently discharged following hospital admission with severe anaemia, all-cause mortality by 6 months was higher than during the in-hospital period (n=5 studies; Mantel-Haenszel odds ratio 1·72, 95% CI 1·22-2·44; p=0·0020; I2=51·5%) and more than two times higher than children previously admitted without severe anaemia (n=4 studies; relative risk [RR] 2·69, 95% CI 1·59-4·53; p<0·0001; I2=69·2%). Readmissions within 6 months of discharge were also more common in children admitted with severe anaemia than in children admitted with other conditions (n=1 study; RR 3·05, 1·12-8·35; p<0·0001). Children admitted with severe acute malnutrition (regardless of severe anaemia) also had a higher 6-month mortality after discharge than those admitted for other reasons (n=2 studies; RR=3·12, 2·02-4·68; p<0·0001; I2=54·7%). Other predictors of mortality after discharge included discharge against medical advice, HIV, bacteraemia, and hypoxia. INTERPRETATION In malaria-endemic settings in Africa, children admitted to hospital with severe anaemia and severe acute malnutrition are at increased risk of mortality in the first 6 months after discharge compared with children admitted with other health conditions. Improved strategies are needed for the management of these high-risk groups during the period after discharge. FUNDING Research Council of Norway and US Centers for Disease Control and Prevention.
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Affiliation(s)
- Titus K Kwambai
- Kenya Medical Research Institute, Centre for Global Health Research, Kisumu, Kenya; Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK; Division of Parasitic Diseases and Malaria, Center for Global Health, Centers for Disease Control and Prevention, Kisumu, Kenya.
| | - Amani T Mori
- Section for Ethics and Health Economics and Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Sarah Nevitt
- Department of Health Data Science, University of Liverpool, Liverpool, Merseyside, UK
| | - Anna Maria van Eijk
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Aaron M Samuels
- Division of Parasitic Diseases and Malaria, Center for Global Health, Centers for Disease Control and Prevention, Kisumu, Kenya; Division of Parasitic Diseases and Malaria, Center for Global Health, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Bjarne Robberstad
- Section for Ethics and Health Economics and Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Kamija S Phiri
- School of Public Health and Family Medicine, College of Medicine, University of Malawi, Blantyre, Malawi
| | - Feiko O Ter Kuile
- Kenya Medical Research Institute, Centre for Global Health Research, Kisumu, Kenya; Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK.
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Ngalesoni FN, Ruhago GM, Mori AT, Robberstad B, Norheim OF. Cost-effectiveness of medical primary prevention strategies to reduce absolute risk of cardiovascular disease in Tanzania: a Markov modelling study. BMC Health Serv Res 2016; 16:185. [PMID: 27184802 PMCID: PMC4869389 DOI: 10.1186/s12913-016-1409-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Accepted: 04/18/2016] [Indexed: 11/27/2022] Open
Abstract
Background Cardiovascular disease (CVD) is a growing cause of mortality and morbidity in Tanzania, but contextualized evidence on cost-effective medical strategies to prevent it is scarce. We aim to perform a cost-effectiveness analysis of medical interventions for primary prevention of CVD using the World Health Organization’s (WHO) absolute risk approach for four risk levels. Methods The cost-effectiveness analysis was performed from a societal perspective using two Markov decision models: CVD risk without diabetes and CVD risk with diabetes. Primary provider and patient costs were estimated using the ingredients approach and step-down methodologies. Epidemiological data and efficacy inputs were derived from systematic reviews and meta-analyses. We used disability- adjusted life years (DALYs) averted as the outcome measure. Sensitivity analyses were conducted to evaluate the robustness of the model results. Results For CVD low-risk patients without diabetes, medical management is not cost-effective unless willingness to pay (WTP) is higher than US$1327 per DALY averted. For moderate-risk patients, WTP must exceed US$164 per DALY before a combination of angiotensin converting enzyme inhibitor (ACEI) and diuretic (Diu) becomes cost-effective, while for high-risk and very high-risk patients the thresholds are US$349 (ACEI, calcium channel blocker (CCB) and Diu) and US$498 per DALY (ACEI, CCB, Diu and Aspirin (ASA)) respectively. For patients with CVD risk with diabetes, a combination of sulfonylureas (Sulf), ACEI and CCB for low and moderate risk (incremental cost-effectiveness ratio (ICER) US$608 and US$115 per DALY respectively), is the most cost-effective, while adding biguanide (Big) to this combination yielded the most favourable ICERs of US$309 and US$350 per DALY for high and very high risk respectively. For the latter, ASA is also part of the combination. Conclusions Medical preventive cardiology is very cost-effective for all risk levels except low CVD risk. Budget impact analyses and distributional concerns should be considered further to assess governments’ ability and to whom these benefits will accrue.
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Affiliation(s)
- Frida N Ngalesoni
- Ministry of Health and Social Welfare, Dar es Salaam, Tanzania. .,Department of Global Public Health and Primary Health Care, University of Bergen, Kalfarveien 31, Post box 7804, NO-5020, Bergen, Norway.
| | - George M Ruhago
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania.,Department of Global Public Health and Primary Health Care, University of Bergen, Kalfarveien 31, Post box 7804, NO-5020, Bergen, Norway
| | - Amani T Mori
- Muhimbili University of Health and Allied Sciences, Dar es Salaam, Tanzania.,Centre of International Health, University of Bergen, Bergen, Norway
| | - Bjarne Robberstad
- Centre of International Health, University of Bergen, Bergen, Norway
| | - Ole F Norheim
- Department of Global Public Health and Primary Health Care, University of Bergen, Kalfarveien 31, Post box 7804, NO-5020, Bergen, Norway
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Mori AT, Ngalesoni F, Norheim OF, Robberstad B. Cost-effectiveness of dihydroartemisinin-piperaquine compared with artemether-lumefantrine for treating uncomplicated malaria in children at a district hospital in Tanzania. Malar J 2014; 13:363. [PMID: 25223864 PMCID: PMC4171550 DOI: 10.1186/1475-2875-13-363] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Accepted: 09/12/2014] [Indexed: 01/01/2023] Open
Abstract
Background Dihydroartemisinin-piperaquine (DhP) is highly recommended for the treatment of uncomplicated malaria. This study aims to compare the costs, health benefits and cost-effectiveness of DhP and artemether-lumefantrine (AL) alongside “do-nothing” as a baseline comparator in order to consider the appropriateness of DhP as a first-line anti-malarial drug for children in Tanzania. Methods A cost-effectiveness analysis was performed using a Markov decision model, from a provider’s perspective. The study used cost data from Tanzania and secondary effectiveness data from a review of articles from sub-Saharan Africa. Probabilistic sensitivity analysis was used to incorporate uncertainties in the model parameters. In addition, sensitivity analyses were used to test plausible variations of key parameters and the key assumptions were tested in scenario analyses. Results The model predicts that DhP is more cost-effective than AL, with an incremental cost-effectiveness ratio (ICER) of US$ 12.40 per DALY averted. This result relies on the assumption that compliance to treatment with DhP is higher than that with AL due to its relatively simple once-a-day dosage regimen. When compliance was assumed to be identical for the two drugs, AL was more cost-effective than DhP with an ICER of US$ 12.54 per DALY averted. DhP is, however, slightly more likely to be cost-effective compared to a willingness-to-pay threshold of US$ 150 per DALY averted. Conclusion Dihydroartemisinin-piperaquine is a very cost-effective anti-malarial drug. The findings support its use as an alternative first-line drug for treatment of uncomplicated malaria in children in Tanzania and other sub-Saharan African countries with similar healthcare infrastructures and epidemiology of malaria. Electronic supplementary material The online version of this article (doi:10.1186/1475-2875-13-363) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Amani T Mori
- Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, P,O, Box 7804, 5020 Bergen, Norway.
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