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Gafane-Matemane LF, Craig A, Kruger R, Alaofin OS, Ware LJ, Jones ESW, Kengne AP. Hypertension in sub-Saharan Africa: the current profile, recent advances, gaps, and priorities. J Hum Hypertens 2024:10.1038/s41371-024-00913-6. [PMID: 38698111 DOI: 10.1038/s41371-024-00913-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 04/15/2024] [Accepted: 04/17/2024] [Indexed: 05/05/2024]
Abstract
Recent global and regional reports consistently confirm the high and increasing prevalence of hypertension in sub-Saharan Africa (SSA), with poor detection, treatment, and control rates. This narrative review summarises the burden of hypertension in SSA and recent findings from community-based hypertension management strategies. We further outline prominent risk factors according to recent data and associated underlying mechanisms for hypertension development. An extensive review of literature showed that most countries have reported on the prevalence of hypertension during 2017-2023, despite limitations linked to the lack of nationally representative studies, heterogeneity of sampling and data collection methods. Task-shifting approaches that assign roles to model patients and community health workers reported improved linkage to healthcare services and adherence to medication, with inconsistent findings on blood pressure (BP)-lowering effects over time. The regularly reported risk factors include unhealthy diet, sedentary lifestyle, increased adiposity and underweight, ageing, level of education, and/or income as well as psychosocial factors. Newer data on the pathophysiological mechanisms leading to hypertension and potential areas of intervention are reported from children and adults and include, among others, salt-handling and volume overload, endothelial function, BP dipping patterns and the role of human immunodeficiency virus . To conclude, significant strides have been made in data reporting from SSA on the burden of hypertension in the region as well as biomarker research to improve understanding and identification of areas of intervention. However, gaps remain on linkage between knowledge generation, translation, and implementation research. Coordinated studies addressing both discovery science and public health are crucial to curb hypertension development and improve management in SSA.
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Affiliation(s)
- Lebo F Gafane-Matemane
- Hypertension in Africa Research Team, North-West University, Potchefstroom, 2520, South Africa.
- SAMRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom, 2520, South Africa.
| | - Ashleigh Craig
- SAMRC/Wits Developmental Pathways for Health Research Unit (DPHRU), University of the Witwatersrand, Soweto, 1864, South Africa
| | - Ruan Kruger
- Hypertension in Africa Research Team, North-West University, Potchefstroom, 2520, South Africa
- SAMRC Research Unit for Hypertension and Cardiovascular Disease, North-West University, Potchefstroom, 2520, South Africa
| | - Omotayo S Alaofin
- Hypertension in Africa Research Team, North-West University, Potchefstroom, 2520, South Africa
| | - Lisa J Ware
- SAMRC/Wits Developmental Pathways for Health Research Unit (DPHRU), University of the Witwatersrand, Soweto, 1864, South Africa
| | - Erika S W Jones
- Division of Nephrology and Hypertension, Groote Schuur Hospital and Kidney and Hypertension Research Unit, University of Cape Town, Cape Town, South Africa
| | - Andre Pascal Kengne
- Non-Communicable Diseases Research Unit, South African Medical Research Council, Francie Van Zijl Dr, Parow Valley, Cape Town, 7501, South Africa
- Department of Biological and Environmental Sciences, Faculty of Natural Sciences, Walter Sisulu University, Mthatha, South Africa
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Mweemba C, Mutale W, Masiye F, Hangoma P. Why is there a gap in self-rated health among people with hypertension in Zambia? A decomposition of determinants and rural‒urban differences. BMC Public Health 2024; 24:1025. [PMID: 38609942 PMCID: PMC11015612 DOI: 10.1186/s12889-024-18429-6] [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: 11/03/2023] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
BACKGROUND Hypertension affects over one billion people globally and is one of the leading causes of premature death. Low- and middle-income countries, especially the sub-Saharan Africa region, bear a disproportionately higher share of hypertension globally. Recent evidence shows a steady shift in the burden of hypertension from more affluent and urban populations towards poorer and rural communities. Our study examined inequalities in self-rated health (SRH) among people with hypertension and whether there is a rural‒urban gap in the health of these patients. We then quantified factors driving the health gap. We also examined how much HIV accounts for differences in self-rated health among hypertension patients due to the relationship between HIV, hypertension and health in sub-Saharan Africa. METHODS We utilized the Zambia Household Health Expenditure and Utilization Survey for data on SRH and other demographic and socioeconomic controls. District HIV prevalence information was from the Zambia Population-Based HIV Impact Assessment (ZAMPHIA) survey. We applied the Linear Probability Model to assess the association between self-rated health and independent variables as a preliminary step. We then used the Blinder-Oaxaca decomposition to identify self-rated health inequality between urban and rural patients and determine determinants of the health gap between the two groups. RESULTS Advanced age, lower education and low district HIV prevalence were significantly associated with poor health rating among hypertension patients. The decomposition analysis indicated that 45.5% of urban patients and 36.9% of rural patients reported good self-rated health, representing a statistically significant health gap of 8.6%. Most of the identified health gap can be attributed to endowment effects, with education (73.6%), district HIV prevalence (30.8%) and household expenditure (4.8%) being the most important determinants that explain the health gap. CONCLUSIONS Urban hypertension patients have better SRH than rural patients in Zambia. Education, district HIV prevalence and household expenditure were the most important determinants of the health gap between rural and urban hypertension patients. Policies aimed at promoting educational interventions, improving access to financial resources and strengthening hypertension health services, especially in rural areas, can significantly improve the health of rural patients, and potentially reduce health inequalities between the two regions.
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Affiliation(s)
- Chris Mweemba
- Department of Health Policy and Management, School of Public Health, University of Zambia, Ridgeway Campus, Lusaka, P.O. Box 50110, Zambia.
| | - Wilbroad Mutale
- Department of Health Policy and Management, School of Public Health, University of Zambia, Ridgeway Campus, Lusaka, P.O. Box 50110, Zambia
| | - Felix Masiye
- Department of Economics, School of Humanities and Social Science, Great East Road Campus, Lusaka, P.O Box 32379, Zambia
| | - Peter Hangoma
- Department of Health Policy and Management, School of Public Health, University of Zambia, Ridgeway Campus, Lusaka, P.O. Box 50110, Zambia
- Chr. Michelson Institute (CMI), Bergen, Norway
- Bergen Center for Ethics and Priority Setting in Health, University of Bergen, Bergen, Norway
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Satapathy P, Khatib MN, Gaidhane S, Zahiruddin QS, Gaidhane AM, Rustagi S, Serhan HA, Padhi BK. Association of neighborhood deprivation and hypertension: A systematic review and meta-analysis. Curr Probl Cardiol 2024; 49:102438. [PMID: 38301916 DOI: 10.1016/j.cpcardiol.2024.102438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 01/29/2024] [Indexed: 02/03/2024]
Abstract
BACKGROUND Hypertension impacts nearly one billion individuals and is a primary health challenge. While traditional perspectives have focused on individual behavior and genetics as principal risk factors, recent research underscores the profound influence of socioeconomic factors within neighborhoods on the risk of hypertension. This systematic review and meta-analysis is aimed to elucidate the association between neighborhood deprivation and the risk of hypertension. METHODS A comprehensive literature search was conducted across PubMed, Embase, and Web of Science from inception until December 25, 2023. Observational studies defining neighborhood deprivation and reporting hypertension incidence were included. Nested Knowledge software was used for screening and data extraction, with study quality assessed using the Newcastle-Ottawa Scale. Statistical analysis was performed with R software (V 4.3), using a random-effects model to calculate the pooled relative risk (RR). RESULTS Twenty-six studies were included in the qualitative analysis and 22 in the meta-analysis, covering over 62 million participants. The pooled RR was 1.139 (95% CI: 1.006 - 1.290), p=0.04, indicating a higher hypertension risk in deprived neighborhoods. Subgroup analyses showed variability by country and deprivation assessment methods. RR varied from 1.00 in Japan (95% CI: 0.93-1.08) to 1.60 (95% CI: 1.07-2.39) in France and 1.57 (95% CI: 0.67-3.70) in Germany, with significant heterogeneity observed in measures of neighborhood deprivation. CONCLUSION Our analysis confirms a significant association between neighborhood deprivation and hypertension, underscoring the importance of socioeconomic factors in public health. It highlights the need for targeted local assessments and interventions. Future research should explore the causal mechanisms and effectiveness of interventions addressing neighborhood deprivation.
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Affiliation(s)
- Prakasini Satapathy
- Center for Global Health Research, Saveetha Medical College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India; School of Pharmacy, Graphic Era Hill University, Dehradun, India; Medical Laboratories Techniques Department, AL-Mustaqbal University, Hillah, Babil 51001, Iraq
| | - Mahalaqua Nazli Khatib
- Division of Evidence Synthesis, Global Consortium of Public Health and Research, Datta Meghe Institute of Higher Education, Wardha, India
| | - Shilpa Gaidhane
- One Health Centre (COHERD), Jawaharlal Nehru Medical College, Datta Meghe Institute of Higher Education, Wardha, India
| | - Quazi Syed Zahiruddin
- South Asia Infant Feeding Research Network (SAIFRN), Division of Evidence Synthesis, Global Consortium of Public Health and Research, Datta Meghe Institute of Higher Education, Wardha, India
| | - Abhay M Gaidhane
- Jawaharlal Nehru Medical College, and Global Health Academy, School of Epidemiology and Public Health, Datta Meghe Institute of Higher Education, Wardha, India
| | - Sarvesh Rustagi
- School of Applied and Life Sciences, Uttaranchal University, Dehradun, Uttarakhand, India
| | - Hashem Abu Serhan
- Department of Ophthalmology, Hamad Medical Corporation, Doha, Qatar.
| | - Bijaya K Padhi
- Department of Community Medicine and School of Public Health, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India.
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Lui S, Dubrofsky L, Khan NA, Tobe SW, Huynh J, Kuyper L, Mathew A, Amin S, Schiffrin EL, Harvey P, Leung AA, Ruzicka M, Mangat B, Reid D, Floras J, Bittman J, Garbutt L, Braam B, Suri R, Hannah-Shmouni F, Prebtani A, Savard S, MacMillan TE, Ruddy TD, Vallee M, Bollu A, Logan A, Padwal R, Ringrose J. Characterizing Hypertension Specialist Care in Canada: A National Survey. CJC Open 2023; 5:907-915. [PMID: 38204853 PMCID: PMC10774075 DOI: 10.1016/j.cjco.2023.08.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 08/29/2023] [Indexed: 01/12/2024] Open
Abstract
Background The hypertension specialist often receives referrals of patients with young-onset, severe, difficult-to-control hypertension, patients with hypertensive emergencies, and patients with secondary causes of hypertension. Specialist hypertension care compliments primary care for these complex patients and contributes to an overall hypertension control strategy. The objective of this study was to characterize hypertension centres and the practice patterns of Canadian hypertension specialists. Methods Adult hypertension specialists across Canada were surveyed to describe hypertension centres and specialist practice in Canada, including the following: the patient population managed by hypertension specialists; details on how care is provided; practice pattern variations; and differences in access to specialized hypertension resources across the country. Results The survey response rate was 73.5% from 25 hypertension centres. Most respondents were nephrologists and general internal medicine specialists. Hypertension centres saw between 50 and 2500 patients yearly. A mean of 17% (± 15%) of patients were referred from the emergency department and a mean of 52% (± 24%) were referred from primary care. Most centres had access to specialized testing (adrenal vein sampling, level 1 sleep studies, autonomic testing) and advanced therapies for resistant hypertension (renal denervation). Considerable heterogeneity was present in the target blood pressure in young people with low cardiovascular risk and in the diagnostic algorithms for investigating secondary causes of hypertension. Conclusions These results summarize the current state of hypertension specialist care and highlight opportunities for further collaboration among hypertension specialists, including standardization of the approach to specialist care for patients with hypertension.
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Affiliation(s)
- Samantha Lui
- Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Lisa Dubrofsky
- Department of Medicine, Women’s College Hospital, Toronto, Ontario, Canada, Division of Nephrology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Nadia A. Khan
- Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Sheldon W. Tobe
- Division of Nephrology Sunnybrook Health Sciences Centre, University of Toronto, Toronto and Northern Ontario School of Medicine, Sudbury, Ontario, Canada
| | - Jessica Huynh
- Department of General Internal Medicine, Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Laura Kuyper
- Division of General Internal Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Anna Mathew
- Division of Nephrology, Department of Medicine, St. Joseph Healthcare Hamilton, Hamilton, Ontario, Canada
| | - Syed Amin
- Division of Nephrology, Saskatchewan Health Authority, Regina, Saskatchewan, Canada
| | - Ernesto L. Schiffrin
- Department of Medicine, Lady Davis Institute for Medical Research, Sir Mortimer B. Davis-Jewish General Hospital, McGill University, Montreal, Quebec, Canada
| | - Paula Harvey
- Division of Cardiology, Department of Medicine and Women’s College Research Institute, Women’s College Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Alexander A. Leung
- Departments of Medicine and Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Marcel Ruzicka
- Division of Nephrology, University of Ottawa, Ottawa, Ontario, Canada
| | - Birinder Mangat
- Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - David Reid
- Dvision of Nephrology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - John Floras
- University Health Network and Sinai Health Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Jesse Bittman
- Division of Community Internal Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Lauren Garbutt
- Division of Endocrinology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Branko Braam
- Department of Medicine, Division of Nephrology, University of Alberta, Edmonton, Alberta, Canada
| | - Rita Suri
- Division of Nephrology, Department of Medicine, McGill University Health Centre, Montreal, Quebec, Canada, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Fady Hannah-Shmouni
- Division of Endocrinology, University of British Columbia, Vancouver, British Columba, Canada, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), National Institutes of Health (NIH), Bethesda, Maryland, USA
| | - Ally Prebtani
- Division of Endocrinology & Metabolism, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Sebastien Savard
- Department of Medicine, Universite Laval, Hotel-Dieu de Quebec, Quebec City, Quebec, Canada
| | - Thomas E. MacMillan
- Department of Medicine, Division of General Internal Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Terrence D. Ruddy
- Division of Cardiology, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Michel Vallee
- Faculté de Médecine, Université de Montréal, Montreal, Quebec, Canada
| | - Apoorva Bollu
- Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Alexander Logan
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Raj Padwal
- Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Jennifer Ringrose
- Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
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Mweemba C, Mutale W, Masiye F, Hangoma P. Why is there a gap in self-rated health among people with hypertension? A decomposition of determinants and rural-urban differences. RESEARCH SQUARE 2023:rs.3.rs-3111338. [PMID: 37461663 PMCID: PMC10350196 DOI: 10.21203/rs.3.rs-3111338/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
Background Hypertension affects over one billion people globally and is one of the leading causes of premature death. The low- and middle-income countries, especially the sub-Saharan Africa region, bear a disproportionately higher share of hypertension globally. Recent evidence shows a steady shift in the burden of hypertension from the more affluent and urban population towards the poorer and rural communities. Our study examined inequalities in self-rated health among people with hypertension and whether there is a rural-urban gap in the health of these patients. We then quantified factors driving the health gap. We also examined how much HIV accounts for differences in self-rated health among hypertension patients due to the relationship between HIV, hypertension and health in sub-Saharan Africa. Methods We utilized the Zambia Household Health Expenditure and Utilization Survey for the data on SRH and other demographic and socioeconomic controls. District HIV prevalence information was from a previous study. The linear probability model provided a preliminary assessment of the association between self-rated health and independent variables. We then used the Blinder-Oaxaca decomposition to identify self-rated health inequality between urban and rural patients and determine determinants of the health gap between the two groups. Results Advanced age, lower education and low district HIV prevalence were significantly associated with poor health rating among hypertension patients. The decomposition analysis indicated that 45.5% of urban patients and 36.9% of rural patients reported good self-rated health, representing a statistically significant health gap of 8.6%. Most of the identified health gap can be attributed to endowment effects, with education (62%), district HIV prevalence (26%) and household expenditure (12%) being the most important determinants that explain the health gap. Conclusions Urban hypertension patients have better SRH than rural patients in Zambia. Educational interventions, financial protection schemes and strengthening hypertension health services in rural areas can significantly reduce the health gap between the two regions.
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Affiliation(s)
- Chris Mweemba
- Department of Health Policy and Management, School of Public Health, P.O. Box 50110, Ridgeway Campus, University of Zambia, Lusaka, Zambia
| | - Wilbroad Mutale
- Department of Health Policy and Management, School of Public Health, P.O. Box 50110, Ridgeway Campus, University of Zambia, Lusaka, Zambia
| | - Felix Masiye
- Department of Economics, School of Humanities and Social Science, P.O Box 32379, Great East Road Campus, University of Zambia, Lusaka, Zambia
| | - Peter Hangoma
- Department of Health Policy and Management, School of Public Health, P.O. Box 50110, Ridgeway Campus, University of Zambia, Lusaka, Zambia
- Chr. Michelson Institute (CMI), Bergen, Norway
- Bergen Center for Ethics and Priority Setting in Health, University of Bergen, Bergen, Norway
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