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Mkhize X, Oldewage-Theron W, Napier C, Duffy KJ. Associations between Cardiometabolic Risk Factors and Increased Consumption of Diverse Legumes: A South African Food and Nutrition Security Programme Case Study. Nutrients 2024; 16:354. [PMID: 38337639 PMCID: PMC10856818 DOI: 10.3390/nu16030354] [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: 11/13/2023] [Revised: 01/18/2024] [Accepted: 01/19/2024] [Indexed: 02/12/2024] Open
Abstract
The programme aimed to improve selected cardiometabolic risk (CMR) variables using a nutritional intervention among farmers who reported hypertensive disorders as hindrances during agricultural activities. The intervention had two case controls (n = 103) [experimental group-EG (n = 53) and control group-CG (n = 50)] which were tracked and whose blood pressure measurements, dietary intake, blood indices for cholesterol concentration and glucose levels from pre- and post-intervention surveys after the baseline survey (n = 112) were analysed. The interval for data collection was 12 weeks (±120 days) after five legume varieties were consumed between 3 and 5 times a day, and servings were not <125 g per at least three times per week. Sixty-five per cent of farmers were above 60 years old, with mean age ranges of 63.3 (SD ± 6.3) years for women and 67.2 (SD ± 6.7) for men. The post-intervention survey revealed that EG blood results indicated nutrient improvement with p <= 0.05 for blood glucose (p = 0.003) and cholesterol (p = 0.001) as opposed to the CG. A trend analysis revealed that cholesterol (p = 0.033) and systolic blood pressure (SBP); (p = 0.013) were statistically significant when comparing genders for all study phases. Interventions focusing on legumes can improve hypertension and cardiovascular disease and fast-track the achievement of SGDs 3 and 12 through community-based programmes.
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Affiliation(s)
- Xolile Mkhize
- Department of Community Extension, Mangosuthu University of Technology, Durban 4031, South Africa
| | - Wilna Oldewage-Theron
- Department of Nutritional Sciences, Texas Tech University, Lubbock, TX 79409, USA
- Department of Sustainable Food Systems and Development, University of Free State, Bloemfontein 9301, South Africa
| | - Carin Napier
- Department of Food and Nutrition, Durban University of Technology, Durban 4001, South Africa;
- School of Population Health, University of Auckland, Auckland 1023, New Zealand
| | - Kevin Jan Duffy
- Institute of Systems Science, Durban University of Technology, Durban 4001, South Africa;
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Madela S, Harriman NW, Sewpaul R, Mbewu AD, Williams DR, Sifunda S, Manyaapelo T, Nyembezi A, Reddy SP. Individual and area-level socioeconomic correlates of hypertension prevalence, awareness, treatment, and control in uMgungundlovu, KwaZulu-Natal, South Africa. BMC Public Health 2023; 23:417. [PMID: 36864433 PMCID: PMC9979474 DOI: 10.1186/s12889-023-15247-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 02/09/2023] [Indexed: 03/04/2023] Open
Abstract
BACKGROUND Hypertension is the second leading risk factor for death in South Africa, and rates have steadily increased since the end of Apartheid. Research on the determinants of hypertension in South Africa has received considerable attention due to South Africa's rapid urbanization and epidemiological transition. However, scant work has been conducted to investigate how various segments of the Black South African population experience this transition. Identifying the correlates of hypertension in this population is critical to the development of policies and targeted interventions to strengthen equitable public health efforts. METHODS This analysis explores the relationship between individual and area-level socioeconomic status and hypertension prevalence, awareness, treatment, and control within a sample of 7,303 Black South Africans in three municipalities of the uMgungundlovu district in KwaZulu-Natal province: the Msunduzi, uMshwathi, and Mkhambathini. Cross-sectional data were collected on participants from February 2017 to February 2018. Individual-level socioeconomic status was measured by employment status and educational attainment. Ward-level area deprivation was operationalized by the most recent (2011 and 2001) South African Multidimensional Poverty Index scores. Covariates included age, sex, BMI, and diabetes diagnosis. RESULTS The prevalence of hypertension in the sample was 44.4% (n = 3,240). Of those, 2,324 were aware of their diagnosis, 1,928 were receiving treatment, and 1,051 had their hypertension controlled. Educational attainment was negatively associated with hypertension prevalence and positively associated with its control. Employment status was negatively associated with hypertension control. Black South Africans living in more deprived wards had higher odds of being hypertensive and lower odds of having their hypertension controlled. Those residing in wards that became more deprived from 2001 to 2011 had higher odds of being aware of their hypertension, yet lower odds of receiving treatment for it. CONCLUSIONS Results from this study can assist policymakers and practitioners in identifying groups within the Black South African population that should be prioritized for public health interventions. Black South Africans who have and continue to face barriers to care, including those with low educational attainment or living in deprived wards had worse hypertension outcomes. Potential interventions include community-based programs that deliver medication to households, workplaces, or community centers.
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Affiliation(s)
- Slm Madela
- Expectra Health Solutions, Dundee, South Africa
| | - N W Harriman
- Social and Behavioral Sciences Department, Harvard T.H. Chan School of Public Health, Boston, USA.
| | - R Sewpaul
- Human and Social Capabilities Division, Human Sciences Research Council, Pretoria, South Africa
| | - A D Mbewu
- Sefako Makgatho Health Sciences University, Ga-Rankuwa, South Africa
| | - D R Williams
- Social and Behavioral Sciences Department, Harvard T.H. Chan School of Public Health, Boston, USA.,African and African American Studies Department, Harvard University, Cambridge, USA
| | - S Sifunda
- Human and Social Capabilities Division, Human Sciences Research Council, Pretoria, South Africa
| | - T Manyaapelo
- Africa Health Research Institute, Somkhele, South Africa
| | - A Nyembezi
- University of the Western Cape, Cape Town, South Africa
| | - S P Reddy
- University of KwaZulu-Natal, Berea, South Africa
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Davis K, Moorhouse L, Maswera R, Mandizvidza P, Dadirai T, Museka T, Nyamukapa C, Smit M, Gregson S. Associations between HIV status and self-reported hypertension in a high HIV prevalence sub-Saharan African population: a cross-sectional study. BMJ Open 2023; 13:e067327. [PMID: 36635037 PMCID: PMC9843216 DOI: 10.1136/bmjopen-2022-067327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
OBJECTIVES This study examined whether HIV status and antiretroviral therapy (ART) exposure were associated with self-reported hypertension in Zimbabwe. DESIGN Study data were taken from a cross-sectional, general population survey, which included HIV testing (July 2018-December 2019). SETTING The data were collected in Manicaland Province, Zimbabwe. PARTICIPANTS 9780 people aged 15 years and above were included. OUTCOME MEASURE Self-reported hypertension was the outcome measure. This was defined as reporting a previous diagnosis of hypertension by a doctor or nurse. After weighting of survey responses by age and sex using household census data, χ2 tests and logistic regression were used to explore whether HIV status and ART exposure were associated with self-reported hypertension. RESULTS The weighted prevalence of self-reported hypertension was 13.6% (95% CI 12.9% to 14.2%) and the weighted prevalence of HIV was 11.1% (10.4% to 11.7%). In univariable analyses, there was no evidence of a difference in the weighted prevalence of self-reported hypertension between people living with HIV (PLHIV) and HIV-negative people (14.1%, 11.9% to 16.3% vs 13.3%, 12.6% to 14.0%; p=0.503) or between ART-exposed and ART-naive PLHIV (14.8%, 12.0% to 17.7% vs 12.8%, 9.1% to 16.4%,p=0.388). Adjusting for socio-demographic variables in logistic regression did not alter this finding (ORs:HIV status:0.88, 0.70 to 1.10, p=0.261; ART exposure:0.83, 0.53 to 1.30, p=0.411). CONCLUSIONS Approximately one in seven PLHIV self-reported having hypertension, highlighting an important burden of disease. However, no associations were found between HIV status or ART exposure and self-reported hypertension, suggesting that it will be valuable to focus on managing other risk factors for hypertension in this population. These findings should be fully accounted for as Zimbabwe reorients its health system towards non-communicable disease control and management.
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Affiliation(s)
- Katherine Davis
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, UK
| | - Louisa Moorhouse
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, UK
| | | | | | - Tawanda Dadirai
- Biomedical Research and Training Institute, Harare, Zimbabwe
| | - Tafadzwa Museka
- Biomedical Research and Training Institute, Harare, Zimbabwe
| | - Constance Nyamukapa
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, UK
- Biomedical Research and Training Institute, Harare, Zimbabwe
| | - Mikaela Smit
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, UK
| | - Simon Gregson
- MRC Centre for Global Infectious Disease Analysis, Department of Infectious Disease Epidemiology, Imperial College London, London, UK
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Wealth and inequality gradients for the detection and control of hypertension in older individuals in middle-income economies around 2007-2015. PLoS One 2022; 17:e0269118. [PMID: 35802577 PMCID: PMC9269405 DOI: 10.1371/journal.pone.0269118] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 05/15/2022] [Indexed: 11/23/2022] Open
Abstract
Socioeconomic inequalities in the detection and treatment of non-communicable diseases represent a challenge for healthcare systems in middle-income countries (MICs) in the context of population ageing. This challenge is particularly pressing regarding hypertension due to its increasing prevalence among older individuals in MICs, especially among those with lower socioeconomic status (SES). Using comparative data for China, Colombia, Ghana, India, Mexico, Russia and South Africa, we systematically assess the association between SES, measured in the form of a wealth index, and hypertension detection and control around the years 2007-15. Furthermore, we determine what observable factors, such as socio-demographic and health characteristics, explain existing SES-related inequalities in hypertension detection and control using a Blinder-Oaxaca decomposition. Results show that the prevalence of undetected hypertension is significantly associated with lower SES. For uncontrolled hypertension, there is evidence of a significant gradient in three of the six countries at the time the data were collected. Differences between rural and urban areas as well as lower and higher educated individuals account for the largest proportion of SES-inequalities in hypertension detection and control at the time. Improved access to primary healthcare in MICs since then may have contributed to a reduction in health inequalities in detection and treatment of hypertension. However, whether this indeed has been the case remains to be investigated.
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Enslin D, Mallya P. Factors influencing treatment adherence in hypertension and HIV management in South Africa: A comparative literature review. S Afr Fam Pract (2004) 2022; 64:e1-e10. [PMID: 36073101 PMCID: PMC10064525 DOI: 10.4102/safp.v64i1.5434] [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: 10/17/2021] [Revised: 03/29/2022] [Accepted: 04/11/2022] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Hypertension (HTN) is the most significant risk factor for cardiovascular disease (CVD) in South Africa (SA), with one in three people over the age of 25 suffering from HTN. Whilst human immunodeficiency virus and acquired immunodeficiency syndrome (HIV/AIDS) are the leading causes of death in South Africa, CVD is in the top 10 causes of death, demonstrating the importance of detecting and controlling blood pressure early on. This study aimed to review adherence factors to antihypertensive medication and antiretroviral therapy (ART) and evaluate the resulting factors influencing adherence discrepancies within the South African population. METHODS A comprehensive literature review was carried out. PubMed, ScienceDirect, Cochrane and Embase were searched for English publications between 2000 and 2021. RESULTS A total of 50 articles covering quantitative and qualitative studies were included. Many studies identified poor adherence levels to antihypertensive treatment, reaching a substandard adherence rate of 41.9%, whilst most studies on the HIV-positive population reported good levels of adherence, with adherence rates of more than 90%. Being of the male gender, advanced age, low socioeconomic status and a low level of education were associated with unsatisfactory adherence rates in both groups. Within the HIV group, more participants had better knowledge concerning the extent of their disease and its required treatments. CONCLUSION The results present substandard adherence levels to antihypertensives compared with antiretroviral (ARV) adherence, despite the influence of more non-adherence factors in the HIV group. The authors recommend better adherence counselling for patients with HTN during every clinic visit, regular healthcare worker training and the implementation of ART adherence programmes in patients with hypertension.
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Affiliation(s)
- Dimitra Enslin
- Department of Health Sciences, Faculty of Life Sciences and Education, University of South Wales, Pontypridd.
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van Loggerenberg M, van der Westhuizen B, Koen N. Key role-players’ perceptions of the current salt legislation in South Africa: opportunities and challenges. SOUTH AFRICAN JOURNAL OF CLINICAL NUTRITION 2022. [DOI: 10.1080/16070658.2022.2051381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | | | - Nelene Koen
- Division of Human Nutrition, Stellenbosch University, Stellenbosch, South Africa
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Kohli-Lynch CN, Erzse A, Rayner B, Hofman KJ. Hypertension in the South African public healthcare system: a cost-of-illness and burden of disease study. BMJ Open 2022; 12:e055621. [PMID: 35193918 PMCID: PMC8867372 DOI: 10.1136/bmjopen-2021-055621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVES To quantify the health and economic burden of hypertension in the South African public healthcare system. SETTING All inpatient, outpatient and rehabilitative care received in the national public healthcare system. PARTICIPANTS Adults, aged ≥20 years, who receive care in the public healthcare system. OUTCOMES Worksheet-based models synthesised data from multiple sources to estimate the burden of disease, direct healthcare costs, and societal costs associated with hypertension. Results were disaggregated by sex. RESULTS Approximately 8.22 million (30.8%, 95% CI 29.5% to 32.1%) South African adults with no private health insurance have hypertension. Hypertension was estimated to cause 14 000 (95% CI 11 100 to 17 200) ischaemic heart disease events, 13 300 (95% CI 10 600 to 16 300) strokes and 6100 (95% CI 4970 to 7460) cases of chronic kidney disease annually. Rates of hypertension, hypertension-related stroke and hypertension-related chronic kidney disease were greater for women compared with men.The direct healthcare costs associated with hypertension were estimated to be ZAR 10.1 billion (95% CI 8.98 to 11.3 billion) or US$0.711 billion (95% CI 0.633 to 0.793 billion). Societal costs were estimated to be ZAR 29.4 billion (95% CI 26.0 to 33.2 billion) or US$2.08 billion (95% CI 1.83 to 2.34 billion). Direct healthcare costs were greater for women (ZAR 6.11 billion or US$0.431 billion) compared with men (ZAR 3.97 billion or US$0.280 billion). Conversely, societal costs were lower for women (ZAR 10.5 billion or US$0.743 billion) compared with men (ZAR 18.9 billion or US$1.33 billion). CONCLUSION Hypertension exerts a heavy health and economic burden on South Africa. Establishing cost-effective best practice guidelines for hypertension treatment requires further research. Such research will be essential if South Africa is to make progress in its efforts to implement universal healthcare.
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Affiliation(s)
- Ciaran N Kohli-Lynch
- SAMRC/Wits Centre for Health Economics and Decision Science, PRICELESS, University of the Witwatersrand, Faculty of Health Sciences, Johannesburg, Gauteng, South Africa
- Center for Health Services & Outcomes Research, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Agnes Erzse
- SAMRC/Wits Centre for Health Economics and Decision Science, PRICELESS, University of the Witwatersrand, Faculty of Health Sciences, Johannesburg, Gauteng, South Africa
| | - B Rayner
- Division of Nephrology and Hypertension, Department of Medicine, University of Cape Town, Cape Town, Western Cape, South Africa
| | - Karen J Hofman
- SAMRC/Wits Centre for Health Economics and Decision Science, PRICELESS, University of the Witwatersrand, Faculty of Health Sciences, Johannesburg, Gauteng, South Africa
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Bonsang E, Caroli E, Garrouste C. Gender heterogeneity in self-reported hypertension. ECONOMICS AND HUMAN BIOLOGY 2021; 43:101071. [PMID: 34757302 DOI: 10.1016/j.ehb.2021.101071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 10/11/2021] [Accepted: 10/11/2021] [Indexed: 06/13/2023]
Abstract
We investigate the gender gap in hypertension misreporting using the French Constances cohort. We show that false negative reporting of hypertension is more frequent among men than among women, even after conditioning on a series of individual characteristics. As a second step, we investigate the causes of the gender gap in hypertension misreporting. We show that women go to the doctor more often than men do and that they have better knowledge of their family medical history. Once these differences are taken into account, the gender gap in false negative reporting of hypertension is reversed. This suggests that information acquisition and healthcare utilisation are crucial ingredients in fighting undiagnosed male hypertension.
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Affiliation(s)
- Eric Bonsang
- Université Paris-Dauphine, Université PSL, LEDA, CNRS, IRD, 75016 PARIS, FRANCE.
| | - Eve Caroli
- Université Paris-Dauphine, Université PSL, LEDA, CNRS, IRD, 75016 PARIS, FRANCE and IZA
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Income-based inequalities in hypertension and in undiagnosed hypertension: analysis of Health Survey for England data. J Hypertens 2020; 38:912-924. [DOI: 10.1097/hjh.0000000000002350] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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