Informing the development of a self-management care programme for older people with type 2 diabetes attending community health centres in Cape Town, South Africa

Diabetes is a growing problem globally, with the major impact being experienced in low and middle-income countries. In 2017, there were an estimated 122.8 million people over the age of 65 years living with diabetes globally, with a prevalence of 18.8% and 3.2 million deaths at this age. If the trends continue, the number of people living with diabetes over the age of 65 years will be 253.4 million in 2045.This is being driven by demographic changes including the ageing of the population. In South Africa, diabetes is a major cause of morbidity and mortality and a burden to the overstretched health services, community, family and people with the disease. Self- care management is a cornerstone of diabetes care. The purpose of this thesis is to inform the development of a self-care management programme for older people attending public sector primary health care services in Cape Town, South Africa by using the PRECEDE planning model. This model provides an eight-phase framework for health care professionals to determine, develop, implement and assess health promotion programmes, as well as the application of health promotion theories systematically within such programmes. The thesis incorporates five interlinked studies, presented as five publications, two published and three in review: The first was a systematic review of studies that assessed the prevalence of type 2 diabetes mellitus among older people in African countries conducted between 2000 and 2015 with the objective of providing data for the monitoring of future trends. This demonstrates that type 2 diabetes is not rare in individuals aged 55 years and older across Africa – the overall prevalence of diabetes was 13.7% (95% CI 11·3–16·3) and was twofold higher in studies based on the oral glucose tolerance test than in those using fasting plasma blood glucose. The second is a secondary analysis of the Study on global AGEing and adult health (SAGE) South Africa Wave 1 data that examined the prevalence of self-reported diabetes and the association between diabetes and each of health-related quality of life and disability amongst South Africa’s older adults. The results were that diabetes was associated with lower quality of life and greater disability: it represented not only a risk factor for disability but was associated with a range of impairments and co-morbidities predisposing to loss of autonomy. The third, a cross-sectional survey, examines the knowledge of older people with diabetes attending primary care clinics in Cape Town, South Africa, about living with and managing their diabetes; and aims to determine the relationship of social support, especially that of family and friends with their self-management. Its major finding is that there was a lack of knowledge about the complications of diabetes, suggesting that the available diabetes educational opportunities have not been effective. Importantly, however, social support was positively associated with both knowledge and a number of self-care aspects. The fourth is a qualitative study consisting of documentary review and individual interviews with key informants to investigate the current policies, programmes and any other interventions as they relate to older people with diabetes. This found that generally older persons face numerous barriers in managing their condition. Further, there are multiple efforts to re-orientate the healthcare system to focus more effectively on non-communicable diseases for the population which would benefit older patients with diabetes. Finally, the study includes a systematic review of peer and non-professional health worker-led diabetes self-management programmes (COMP-DSMP) in low and middle-income country primary health care settings, and also examines the implementation strategies and associated diabetes-related health outcomes This found equivocal evidence supporting the use of COMP-DSMP for people with diabetes in these countries and suggested that the models of a peer/CHW-led programme need to be further explored, especially given the inevitability of a professional healthcare workforce shortage in LMICs. In conclusion, this research study has described the extent of the need for developing and evaluating education programmes that focus on older people with diabetes and emphasises the role of family and friends. Whilst there have been some significant policy interventions pertaining to the protection of the health and welfare of older persons in SA, the needs of this vulnerable group remain relatively low on the list of priorities in terms of focus and resource allocation. In this context, older people, as a distinct group, are also not a strong focus in current health policy relating to the provision of NCD care. This thesis alerts policymakers and clinicians to some of the specific issues considered to be pertinent and important in the care and management of older persons with diabetes. Many of these would also be applicable to older individuals with other chronic conditions

N-acetylcysteine for non-paracetamol drug-induced liver injury: a systematic review protocol

BACKGROUND: Drug-induced liver injury (DILI) refers to acute or chronic liver injury that may occur as a consequence of using drugs and herbal or dietary supplements. Specific therapies for DILI are limited. There is considerable evidence for efficacy and safety of N-acetylcysteine (NAC) in management of paracetamol-induced liver injury. More recently, research has explored the use of NAC in non-paracetamol drug-induced liver injury. It is important to summarise the evidence of NAC for non-paracetamol DILI to determine if NAC may be considered a therapeutic option in this condition.METHODS/DESIGN:We will conduct a systematic review of the benefit and harm of NAC in non-paracetamol drug-induced liver injury. Primary and secondary outcomes of interest are pre-specified. Primary outcomes include all-cause mortality, mortality due to DILI, time to normalisation of liver biochemistry (e.g. return of alanine transaminase to <100 U/l and/or international normalized ratio (INR) <1.5) and adverse events. Secondary outcomes include transplantation rate, time to transplantation, transplant-free survival and duration of hospitalisation. We will include randomized controlled trials (RCTs) and prospective cohort studies. RCTs will contribute to the evaluation of safety and efficacy of NAC, whereas, the cohort studies will contribute exclusively to the evaluation of safety. We will search several bibliographic databases (including PubMed, Scopus, CINAHL, CENTRAL), grey literature sources, conference proceedings and ongoing trials. Following data extraction and assessment of the risk of bias, we will conduct a meta-analysis if feasible, as well as subgroup analyses. We will assess and explore clinical and statistical heterogeneity.DISCUSSION:The aim of this review is to provide evidence on the effectiveness and safety of NAC in non-paracetamol DILI. We anticipate that the results could aid health care practitioners, researchers and policymakers in the decision-making regarding the use of NAC in patients with non-paracetamol DILI.SYSTEMATIC REVIEW REGISTRATION:PROSPERO CRD4201400877

The effectiveness of peer and community health worker-led self-management support programs for improving diabetes health-related outcomes in adults in low- and-middle-income countries: a systematic review

Objective Community-based peer and community health worker-led diabetes self-management programs (COMP-DSMP) can benefit diabetes care, but the supporting evidence has been inadequately assessed. This systematic review explores the nature of COMP-DSMP in low- and middle-income countries’ (LMIC) primary care settings and evaluates implementation strategies and diabetes-related health outcomes. Methods We searched the Cochrane Library, PubMed-MEDLINE, SCOPUS, CINAHL PsycINFO Database, International Clinical Trials Registry Platform, Clinicaltrials.gov, Pan African Clinical Trials Registry (PACTR), and HINARI (Health InterNetwork Access to Research Initiative) for studies that evaluated a COMP-DSMP in adults with either type 1 or type 2 diabetes in World Bank-defined LMIC from January 2000 to December 2019. Randomised and non-randomised controlled trials with at least 3 months follow-up and reporting on a behavioural, a primary psychological, and/or a clinical outcome were included. Implementation strategies were analysed using the standardised implementation framework by Proctor et al. Heterogeneity in study designs, outcomes, the scale of measurements, and measurement times precluded meta-analysis; thus, a narrative description of studies is provided. Results Of the 702 records identified, eleven studies with 6090 participants were included. COMP-DSMPs were inconsistently associated with improvements in clinical, behavioural, and psychological outcomes. Many of the included studies were evaluated as being of low quality, most had a substantial risk of bias, and there was a significant heterogeneity of the intervention characteristics (for example, peer definition, selection, recruitment, training and type, dose, and duration of delivered intervention), such that generalisation was not possible. Conclusions The level of evidence of this systematic review was considered low according to the GRADE criteria. The existing evidence however does show some improvements in outcomes. We recommend ongoing, but well-designed studies using a framework such as the MRC framework for the development and evaluation of complex interventions to inform the evidence base on the contribution of COMP-DSMP in LMIC

Outcomes of hyperglycaemia in pregnancy in Africa: systematic review study protocol

Introduction The prevalence of diabetes mellitus globally has increased considerably over the past decades with a resultant increase in the incidence of diabetes-complicated pregnancies. Hyperglycaemia in pregnancy is the most common metabolic complication encountered during pregnancy and is associated with adverse maternal and fetal outcomes. This systematic review aims to examine maternal, fetal, neonatal, childhood and long-term maternal outcomes of hyperglycaemia in pregnancy in Africa.Methods and analysis A systematic review of all studies that investigated hyperglycaemia in pregnancy outcomes, carried out in Africa from 1998 to 2019. A comprehensive search of all published articles indexed in PubMed-MEDLINE, Cochrane Library, Scopus, CINAHL (EBSCOhost), Embase and Web of Science databases will be performed. Studies will be screened for eligibility by title, abstract and full text in duplicate by two independent reviewers. For data where meta-analysis is not possible, narrative analysis will be carried out using themes from data. For data where meta-analysis is possible, random effects meta-analysis will be conducted. This systematic review will be reported according to the Meta-analyses of Observational Studies in Epidemiology.Ethics and dissemination Ethical approval is not required for this study considering this is a systematic review protocol that uses only published data. The findings of this study will be disseminated through peer-reviewed publications and conference presentations.PROSPERO registration number CRD42020184573

Does social support effect knowledge and diabetes self-management practices in older persons with Type 2 diabetes attending primary care clinics in Cape Town, South Africa?

BACKGROUND:In South Africa with one of the most rapidly ageing populations in Africa despite the demographic impact of the HIV/AIDS epidemic, diabetes is a major cause of morbidity and mortality. Self-management is challenging for all those with the condition but is likely to create a higher demand for those who may have existing co-morbidities associated with age, and long-standing chronic diseases. OBJECTIVE:To determine the relationship of social support, especially that of family and friends with their self-management. METHODS:This cross-sectional study was undertaken in the Cape Town metropole primary care clinics. The sample comprised 406 people drawn from four community health centres (CHC) that are served by Groote Schuur Hospital at the tertiary level. RESULTS:Of the 406 participants, 68.5% were females, 60.5% were living with a family member, and almost half were married. The mean duration of diabetes from diagnosis was eight years. More than half (57.4%) had no or only primary education. Half the participants (50.2%) had poor knowledge level in relation to symptoms and complications of diabetes. Multivariable linear regression showed older age was associated with poor knowledge (®: -1.893, 95% CI-3.754; -0.031) and higher income was associated with self-management practice (®: 3.434, 95% CI 0.797; 6.070). Most participants received family support to follow aspects of diabetes self-management. The ordinal logistic regression indicated that family support was positively associated with the self-management practice score for following a diabetic meal plan, taking care of feet, physical activity, testing blood sugar and handling participants' feelings about being diabetic, but not for taking medication. CONCLUSIONS:Consideration needs to be given to developing and testing education programmes that focus on needs of older people with diabetes and emphases the role of family and friends

Diabetes in South African older adults: prevalence and impact on quality of life and functional disability – as assessed using SAGE Wave 1 data

Background: Diabetes is a chronic disease with severe late complications. It is known to impact the quality of life and cause disability, which may affect an individual’s capacity to manage and maintain longer-term health and well-being. Objectives: To examine the prevalence of self-report diabetes, and association between diabetes and each of health-related quality of life and disability amongst South Africa’s older adults. To study both the direct relationship between diabetes and these two measures, as well as moderation effects, i.e. whether associations between other factors and these measures of well-being differed between individuals with diabetes and those without. Methods: Secondary analyses of data on participants aged 50 years and older from the Study on global AGEing and adult health (SAGE) in South Africa Wave 1 (2007–2008) were conducted. Prevalence of self-reported diabetes was assessed. Multivariable regressions describe the relationships between each of quality of life (WHOQoL) and disability (WHODAS), and diabetes, while controlling for selected socio-demographic characteristics, health risk behaviours and co-morbid conditions. In the regression models, we also investigated whether diabetes moderates the relationships between these additional factors and WHOQoL/WHODAS. Results: Self-reported diabetes prevalence was 9.2% (95% CI: 7.8,10.9) and increased with age. Having diabetes was associated with poorer WHOQoL scores (additive effect: −4.2; 95% CI: −9.2,0.9; p-value <0.001) and greater disability (multiplicative effect: 2.1; 95% CI: 1.5,2.9; p-value <0.001). Lower quality of life and greater disability were both related to not being in a relationship, lower education, less wealth, lower physical activity and a larger number of chronic conditions. Conclusions: Diabetes is associated with lower quality of life and greater disability amongst older South Africans. Attention needs to be given to enhancing the capacity of health systems to meet the changing needs of ageing populations with diabetes in SA as well as facilitating social support networks in communities

Outcomes of hyperglycaemia in pregnancy in Africa: Systematic review study protocol

Introduction The prevalence of diabetes mellitus globally has increased considerably over the past decades with a resultant increase in the incidence of diabetes-complicated pregnancies. Hyperglycaemia in pregnancy is the most common metabolic complication encountered during pregnancy and is associated with adverse maternal and fetal outcomes. This systematic review aims to examine maternal, fetal, neonatal, childhood and long-term maternal outcomes of hyperglycaemia in pregnancy in Africa. Methods and analysis A systematic review of all studies that investigated hyperglycaemia in pregnancy outcomes, carried out in Africa from 1998 to 2019. A comprehensive search of all published articles indexed in PubMed-MEDLINE, Cochrane Library, Scopus, CINAHL (EBSCOhost), Embase and Web of Science databases will be performed. Studies will be screened for eligibility by title, abstract and full text in duplicate by two independent reviewers. For data where meta-analysis is not possible, narrative analysis will be carried out using themes from data. For data where meta-analysis is possible, random effects meta-analysis will be conducted. This systematic review will be reported according to the Meta-analyses of Observational Studies in Epidemiology. Ethics and dissemination Ethical approval is not required for this study considering this is a systematic review protocol that uses only published data. The findings of this study will be disseminated through peer-reviewed publications and conference presentations. PROSPERO registration number CRD42020184573

The prevalence of type 2 diabetes mellitus among older people in Africa : a systematic review study protocol

CITATION: Werfalli, M., et al. 2014. The prevalence of type 2 diabetes mellitus among older people in Africa : a systematic review study protocol. BMJ Open, 4:e004747, doi:10.1136/bmjopen-2013-004747.The original publication is available at http://bmjopen.bmj.comIntroduction: The number of people with diabetes in Africa is projected to increase substantially in the next two decades, due to factors including rapid urbanisation, adoption of unhealthy diets and exercise patterns and the ageing of the population. There are currently uncertainties regarding the incidence, prevalence and management patterns of diabetes in older people across the diversity of African countries. We wish to perform a systematic review to determine the prevalence of type 2 diabetes in Africa in the older individual, over the age of 55 years, reported in studies from 2000 to 2013. Methods: and analyses A comprehensive literature search among a number of databases will be undertaken, using an African search filter to identify diabetes prevalence studies that were published from 2000 to 2013. Full copies of articles identified by the search, and considered to meet the inclusion criteria, will be obtained for data extraction and synthesis. Statistical analysis of the primary measures, fasting plasma glucose (FPG) and oral glucose tolerance test will include two steps: (1) identification of data sources and documenting estimates and (2) application of the random-effects meta-analysis model to aggregate prevalence estimates and account for between study variability in calculating the overall pooled estimates and 95% CI for diabetes prevalence. Heterogeneity will be evaluated using the I2 statistic to determine the extent of variation in effect estimates that is due to heterogeneity rather than chance. This systematic review will be reported according to the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA). Ethics and dissemination: Ethics is not required for this study, given that this is a protocol for a systematic review, which utilises published data. The findings of this study will be widely disseminated through peer-reviewed publications and conference presentations.http://bmjopen.bmj.com/content/4/6/e004747.abstractPublisher's versio

Prevalence of type 2 diabetes mellitus in women of childbearing age in Africa during 2000–2016: protocol of a systematic review and meta-analysis

Introduction: African women of childbearing age are increasingly being exposed to risk factors for type 2 diabetes mellitus (T2DM), most particularly obesity. A differentiating feature of diabetes in women of childbearing age is that the disease may affect the mother and the developing fetus. Apart from mapping the extent of the problem, understanding the prevalence of T2DM in African women of childbearing age can help to galvanise targeted interventions for reducing the burden of T2DM. This is a protocol for a systematic review aiming to assess the prevalence of and risk factors for T2DM in women of childbearing age (15–49 years) in Africa. Methods and analyses We will carry out a comprehensive literature search among a number of databases, using appropriate adaptations of the African search filter to identify diabetes prevalence studies, published from 2000 to 2016, among African women of childbearing age (15–49 years) according to the WHO definition. Full copies of articles identified through searches and considered to meet the inclusion criteria will be obtained for data extraction and synthesis. The analysis of the primary outcome (prevalent diabetes) will include two steps: (1) identification of data sources and documenting estimates and (2) application of the random-effects meta-analysis model to aggregate prevalence estimates and account for between-study variability in calculating the overall pooled estimates and 95% CI for diabetes prevalence. We will assess heterogeneity and publication bias using established methods. This systematic review will be reported according to the Preferred Reporting Items for Systematic reviews and Meta-Analyses Protocol (PRISMA-P) 2015. Ethics and dissemination Ethical approval is not required for this study, given that this is a protocol for a systematic review, which utilises published data. The findings of this study will be widely disseminated through peer reviewed publications and conference presentations. Trial registration number CRD42015027635

IDF Diabetes Atlas: Estimation of Global and Regional Gestational Diabetes Mellitus Prevalence for 2021 by International Association of Diabetes in Pregnancy Study Group’s Criteria

AimsThe approaches used to screen and diagnose gestational diabetes mellitus (GDM) vary widely. We generated a comparable estimate of the global and regional prevalence of GDM by International Association of Diabetes in Pregnancy Study Group (IADPSG)'s criteria. MethodsWe searched PubMed and other databases and retrieved 57 studies to estimate the prevalence of GDM. Prevalence rate ratios of different diagnostic criteria, screening strategies and age groups, were used to standardize the prevalence of GDM in individual studies included in the analysis. Fixed effects meta-analysis was conducted to estimate standardized pooled prevalence of GDM by IDF regions and World Bank country income groups. ResultsThe pooled global standardized prevalence of GDM was 14.0% (95% confidence interval: 13.97–14.04%). The regional standardized prevalence of GDM were 7.1% (7.0–7.2%) in North America and Caribbean (NAC), 7.8% (7.2–8.4%) in Europe (EUR), 10.4% (10.1–10.7%) in South America and Central America (SACA), 14.2% (14.0–14.4%) in Africa (AFR), 14.7% (14.7–14.8%) in Western Pacific (WP), 20.8% (20.2–21.4%) in South-East Asia (SEA) and 27.6% (26.9–28.4%) in Middle East and North Africa (MENA). The standardized prevalence of GDM in low-, middle- and high-income countries were 12.7% (11.0–14.6%), 9.2% (9.0–9.3%) and 14.2% (14.1–14.2%), respectively. ConclusionsThe highest standardized prevalence of GDM was in MENA and SEA, followed by WP and AFR. Among the three World Bank country income groups, high income countries had the highest standardized prevalence of GDM. The standardized estimates for the prevalence of GDM provide an insight for the global picture of GDM