Publications by authors named "Yonga G"

Article Synopsis
  • Most heart failure (HF) studies have focused on high-income nations, leaving a gap in data from middle- and low-income countries regarding HF causes and management.
  • The study analyzed 23,341 participants across various economic levels over two years, finding ischemic heart disease as the leading cause of HF.
  • Results showed better treatment and lower mortality rates in high-income countries, with significant disparities in medication use and hospitalization rates compared to lower-income nations.
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Background: Residents of informal settlements in Sub-Sahara Africa (SSA) are vulnerable to the health impacts of climate change. Little is known about the knowledge, attitudes and practices (KAP) of inhabitants of informal settlements in SSA regarding climate change and its health impacts. The aim of this study was to investigate how inhabitants of an informal settlement in SSA experience climate change and its health impacts and assess related knowledge, attitudes and practices.

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Article Synopsis
  • A randomized, double-blind trial was conducted across 30 centers in Asia, the Middle East, and Africa to investigate the effects of influenza vaccination on death and cardiovascular events in heart failure patients.
  • Participants aged 18 and older received either the influenza vaccine or a placebo annually for up to 3 years, while outcomes such as cardiovascular death, non-fatal heart attacks, and strokes were monitored.
  • The study aimed to determine if the vaccination could lower the risk of these events, particularly during peak influenza seasons, with assessments taking place every six months.
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  • The study highlights the underestimation of congenital heart disease (CHD) in Africa due to under-reporting and early mortality rates.
  • It investigates the prevalence and factors linked to late diagnosis of CHD in pediatric patients at three hospitals in Kenya over five years, finding that 60.6% of patients were diagnosed after the age of one.
  • Key factors affecting late diagnosis include the presence of a cardiac murmur and parental education level, emphasizing the need for improved early detection and screening practices to lower CHD-related health issues.
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  • The study investigates the factors affecting health-related quality of life (HRQL) in heart failure patients across various income levels, including high, upper middle, lower middle, and low-income countries.
  • Data collected from over 23,000 heart failure patients between 2017 and 2020 utilized the Kansas City Cardiomyopathy Questionnaire to assess HRQL, showing that patients from high-income countries reported the best quality of life compared to those from low-income countries.
  • Key correlates of HRQL included symptom severity, classified by New York Heart Association stages, and socioeconomic status, with symptoms accounting for most of the variability in HRQL across different income levels.
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Sub-Saharan Africa has been identified as one of the most vulnerable regions to climate change. The objective of this study was to explore knowledge and perspectives on climate change and health-related issues, with a particular focus on non-communicable diseases, in the informal settlement (urban slum) of Mukuru in Nairobi, Kenya. Three focus group discussions and five in-depth interviews were conducted with total of 28 participants representing local community leaders, health care workers, volunteers, policy makers and academia.

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Article Synopsis
  • Rheumatic heart disease (RHD) is the third most common cause of acute heart failure (AHF) in Sub-Saharan Africa, identified in a study with over a thousand patients.
  • Among 1,006 AHF patients, 143 (14.3%) had RHD-AHF, and researchers compared the clinical features and outcomes between RHD-AHF and non-RHD-AHF cases.
  • RHD-AHF patients were generally younger, more likely to be female, exhibited unique cardiovascular characteristics, and faced a higher initial hospitalization mortality rate compared to those with other types of heart failure.
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Overweight and obesity rates continue to rise globally and are associated with increased chronic disease morbidity and mortality. There is evidence of high overweight and obesity prevalence in Kenya, however; a gap exists in the knowledge of national prevalence and predictors of overweight and obesity. This cross-sectional study examined data from the 2015 World Health Organization (WHO) Kenya STEPwise Survey-the first nationally representative survey to objectively measure body mass index (BMI) among Kenyan men and women.

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: Climate change affects human health with those with the least resources being most vulnerable. However, little is known about the impact of climate change on human health and effective adaptation methods in informal settlements in low- and middle-income countries.: The objective of this scoping review was to identify, characterize, and summarize research evidence on the impact of climate change on human health in informal settlements and the available adaptation methods and interventions.

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  • A chronic disease management model called Empower Health was launched in Ghana and Kenya in 2018 to enhance awareness and tackle hypertension more effectively.
  • The program provided personalized management plans, regular blood pressure checks, and immediate feedback via a mobile app, improving patient engagement and monitoring.
  • Results showed a significant drop in average systolic blood pressure after 12 months, with the percentage of patients maintaining controlled blood pressure rising from 46% to 77%.
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Sub-Saharan Africa has seen a rapid increase in non-communicable disease (NCD) burden over the last decades. The East African Community (EAC) comprises Burundi, Rwanda, Kenya, Tanzania, South Sudan and Uganda, with a population of 177 million. In those countries, 40% of deaths in 2015 were attributable to NCDs.

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Strengthening Primary Health Care Systems is the most effective policy response in low-and middle-income countries to protect against health emergencies, achieve universal health coverage, and promote health and wellbeing. Despite the Astana declaration on primary health care, respective investment is still insufficient in Sub-Sahara Africa. The SARS-CoV-2019 pandemic is a reminder that non-communicable diseases (NCDs), which are increasingly prevalent in Sub-Sahara Africa, are closely interlinked to the burden of communicable diseases, exacerbating morbidity and mortality.

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Background: Hypertension is the leading risk factor for mortality globally. African countries, including Kenya, have a high and rising prevalence of hypertension. Prehypertension is associated with an increased risk of progression to overt hypertension and a higher risk of cardiovascular disease and mortality.

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Objective: To evaluate the impact of Healthy Heart Africa (HHA), a comprehensive hypertension intervention programme, on hypertension awareness, knowledge, screening and diagnosis among rural communities in Kenya.

Methods: Individuals from rural households near intervention and matched control healthcare facilities were randomly surveyed at baseline and the end point (after 12 months). A difference-in-differences analysis estimated the impact of HHA.

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The first genotyping data on measles virus (MeV) strains in Cameroon dates from 1994, while other studies were realized in 2001 and 2011 with the establishment of MeV virological surveillance. However, the genetic data of MeV strains circulating in Cameroon remains fragmented and concentrated in certain regions, hence the need for an update. The objective of this study was to have recent data on MeV genotypes circulating in Cameroon.

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Background: Given the rising burden of hypertension in Africa, the Healthy Heart Africa program was developed to improve access to quality hypertension care in the primary care setting. The Healthy Heart Africa program provides a comprehensive, coordinated intervention directed at health care providers (HCPs) and the general public.

Objective: The impact of Healthy Heart Africa on HCPs' knowledge of hypertension and facility-level services in Kenya was evaluated by a 12-month prospective study.

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Background: Influenza is associated with an increase in the risk of cardiac and other vascular events. Observational data and small randomized trials suggest that influenza vaccination may reduce such adverse vascular events.

Research Design And Methods: In a randomized controlled trial patients with heart failure are randomized to receive either inactivated influenza vaccine or placebo annually for 3 years.

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Non-communicable diseases (NCDs) prevalence is rising fastest in lower income settings, and with more devastating outcomes compared to High Income Countries (HICs). While evidence is consistent on the growing health and economic consequences of NCDs in sub-Saharan Africa (SSA), specific efforts aimed at addressing NCD prevention and control remain less than optimum and country level progress of implementing evidence backed cost-effective NCD prevention approaches such as tobacco taxation and restrictions on marketing of unhealthy food and drinks is slow. Similarly, increasing interest to employ multi-sectoral approaches (MSA) in NCD prevention and policy is impeded by scarce knowledge on the mechanisms of MSA application in NCD prevention, their coordination, and potential successes in SSA.

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Objective: To determine the prevalence of cardiovascular risk factors and their association with antiretroviral therapy (ART) among HIV-infected adults in a rural sub-county hospital in Kenya.

Methods: This was a descriptive survey of patient charts characterising cardiovascular risk among adult patients (> 18 years) at Ukwala sub-county hospital between June 2013 and January 2015. Post-stratification survey weights were applied to obtain prevalence levels.

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Background: The Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2016 provided comprehensive estimates of health loss globally. Decision makers in Kenya can use GBD subnational data to target health interventions and address county-level variation in the burden of disease.

Methods: We used GBD 2016 estimates of life expectancy at birth, healthy life expectancy, all-cause and cause-specific mortality, years of life lost, years lived with disability, disability-adjusted life-years, and risk factors to analyse health by age and sex at the national and county levels in Kenya from 1990 to 2016.

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Background: Health care resource allocation remains challenging in lower middle income countries such as Kenya with meager resources being allocated to resuscitation and critical care. The causes and outcomes for in-hospital cardiac arrest and resuscitation have not been studied.

Objectives: This study sought to determine the initial rhythm and the survival for patients developing in-hospital cardiac arrest.

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Introduction: Rheumatic heart disease (RHD) is the commonest cause of valvular heart disease and a common cause of heart failure in sub-Saharan Africa (SSA). Atrial fibrillation (AF) complicates RHD, precipitates and worsens heart failure and cause unfavourable outcomes. We set out to describe the prevalence, clinical characteristics and outcomes of valvular atrial fibrillation in a cohort of African patients with acute heart failure (AHF).

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: The current article reviews economic aspects of selected HIV/noncommunicable disease (NCD) service delivery integration programs to assess the efficiency of integration in limited capacity settings. We define economies of scope and scale and their relevance to HIV/NCD integration. We summarize the results of a systematic review of cost and cost-effectiveness studies of integrated care, which identified 12 datasets (nine studies) with a wide range of findings driven by differences in research questions, study methods, and health conditions measured.

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