Epidemiological profile of stroke in Qatar: Insights from a seven-year observational study

OBJECTIVES

Stroke prevalence is progressively increasing in developing countries due to increased vascular risk factors. This study aims to describe the epidemiology, prevalent risk factors, and outcomes of stroke in a multi-ethnic society of Qatar.

MATERIALS AND METHODS

We conducted a retrospective analysis of all patients with suspected stroke admitted to stroke services between January 2014 and September 2020.

RESULTS

A total of 11,892 patients were admitted during this period with suspected stroke. Of these, the diagnosis was ischemic stroke (48.8 %), transient ischemic attack (10.3 %), intracerebral hemorrhage (10.9 %), cerebral venous sinus thrombosis (1.3 %), and stroke mimics (28.6 %). The median age was 52 (43-62), with a male-female ratio of 3:1. The study population was predominantly Asian (56.8 %) and Arab (36 %). The majority of the patients were hypertensive (66.8 %), diabetic (47.9 %), and dyslipidemic (45.9 %). A history of prior stroke was observed in 11.7 %, while 0.9 % had prior transient ischemic attack. Among ischemic strokes, 31.7 % arrived within 4.5 h, 12.5 % received thrombolysis, and 4.6 % underwent thrombectomy. Median Door-to-Needle time was 51 (33-72) minutes. The average length of stay was 5.2 ± 9.0 days, with 71.5 % discharged home, 13.8 % transferred to rehabilitation, 9.3 % to other specialties, 3 % to long-term care, and 2.4 % suffered in-hospital mortality.

CONCLUSION

Stroke in Qatar is characterized by a younger, expatriate-dominant cohort, with notable prevalence of ischemic and hemorrhagic stroke and a distinct risk factor profile. Further analysis of epidemiological differences among different population groups can inform targeted policies for prevention and management to reduce the burden of disease.

Stroke as the index presentation of traditional cardiovascular risk factors and Human Immunodeficiency Virus in a South African population

OBJECTIVES

We sought to identify what proportion of each cardiovascular risk factor and Human Immunodeficiency Virus (HIV) was first diagnosed at the time of stroke, compared to those that were diagnosed prior to the event, and to explore if this had any impact on the severity of stroke.

METHODS

Adult patients presenting with a new stroke to a quaternary hospital in Johannesburg between 2014 and 2017 were prospectively recruited. Patients were investigated for undiagnosed traditional cardiovascular risk factors (hypertension, diabetes mellitus, dyslipidaemia, atrial fibrillation, obesity and smoking), as well as HIV infection. Stroke severity was assessed using the National Institutes of Health Stroke Scale (NIHSS).

RESULTS

346 patients were included. Stroke was the index presentation for at least one risk factor in 199 (57.5 %) patients. Dyslipidaemia was newly diagnosed in 76.0 % of all dyslipidaemics (95 out of 125). Newly-diagnosed dyslipidaemia was associated with a more severe neurological deficit (Median NIHSS of 12 (8-16) vs 7 (4-12), p=0.0007) and younger age on presentation (53 (44-63) years vs 62 (51-71) years, p=0.02) as compared to previously-diagnosed dyslipidaemia.

CONCLUSIONS

More than half of patients had previously undiagnosed modifiable risk factors at the time of their stroke. Dyslipidaemia was undiagnosed in a very high proportion, and this was associated with a higher stroke severity and younger age of presentation.

Global synergistic actions to improve brain health for human development

The global burden of neurological disorders is substantial and increasing, especially in low-resource settings. The current increased global interest in brain health and its impact on population wellbeing and economic growth, highlighted in the World Health Organization's new Intersectoral Global Action Plan on Epilepsy and other Neurological Disorders 2022-2031, presents an opportunity to rethink the delivery of neurological services. In this Perspective, we highlight the global burden of neurological disorders and propose pragmatic solutions to enhance neurological health, with an emphasis on building global synergies and fostering a 'neurological revolution' across four key pillars - surveillance, prevention, acute care and rehabilitation - termed the neurological quadrangle. Innovative strategies for achieving this transformation include the recognition and promotion of holistic, spiritual and planetary health. These strategies can be deployed through co-design and co-implementation to create equitable and inclusive access to services for the promotion, protection and recovery of neurological health in all human populations across the life course.

Community-based interventions to prevent stroke in low-income and middle-income countries: a protocol for a systematic review and meta-analysis

INTRODUCTION

Stroke is the second leading cause of death and morbidity across the globe. In low-income and middle-income countries (LMICs), it has become an overwhelming burden over the past few decades. This burden is escalating at a much greater pace compared with that of high-income countries. It is considered the most frequent cause of adult disability that affects the quality of life. 'Prevention' is one of the key components to combating stroke. In this regard, community-based interventions can play a vital role in improving population-level health and well-being. Considering the escalating trend of stroke in LMICs, this systematic review aims to map the available community-based interventions in preventing stroke and to conduct further analysis regarding the effectiveness of the identified interventions.

METHODS AND ANALYSIS

We have searched Medline, Web of Science and Scopus using a comprehensive search strategy in October 2021. Two reviewers will independently perform screening, data extraction and risk of bias (ROB) assessment. The ROB assessment and applicability of results of eligible studies will be performed using the Cochrane ROB tool for assessing randomised controlled trials and the ROBANS (Risk Of Bias Assessment tool for Non-randomised Studies) to assess non-randomised studies. A random-effect model meta-analysis will be used to calculate pooled results and to obtain weighted OR and risk ratio of incidence of stroke along with corresponding 95% CI.

ETHICS AND DISSEMINATION

The results will be disseminated through publishing in a peer-reviewed journal and public presentations at relevant national and international conferences. Ethical approval is not required as this is a systematic review of publicly available data.

PROSPERO REGISTRATION NUMBER

CRD42021283670.

Osuntokun Award Lecture 2021: Challenges of Measuring the Burden of Stroke in Africa

BACKGROUND

Over recent years non-communicable diseases have dramatically increased in low- and middle-income countries, including those of sub-Saharan Africa. With continuing high levels of infectious disease, these countries now face the double burden of disease. Stroke has emerged as a major cause of hospital admission, disability, and mortality for which the major modifiable risk factor is hypertension, which is often not diagnosed and, even if diagnosed, not treated and, even if treated, not controlled.

METHODS

In this award lecture paper I outline my personal experience of measuring the burden of, and risk factors for, stroke in sub-Saharan Africa, along with the challenges faced. I will specifically describe the measurement of mortality and case fatality, prevalence and incidence as well as commenting on aetiology and risk factors and reflect on future initiatives and directions.

RESULTS

Over the past 5 decades there has been a dramatic increase in numbers of stroke patients admitted to hospital throughout sub-Saharan Africa, with high in hospital mortality rates, also reflected in high case fatality rates in those cohorts followed up following discharge from hospital. Community-based surveys assessing mortality from stroke using verbal autopsy have demonstrated very high age-adjusted rates. Age adjusted prevalence rates assessed by door-to-door surveys have generally shown lower prevalence than high income countries. The Tanzanian stroke incidence study, which incorporated verbal autopsy for those patients dying before reaching hospital, demonstrated some of the highest age-adjusted stroke incidence rates in the world. There were high rates of stroke in younger ages and high rates of intracranial haemorrhage though not as high as previously shown in hospital-based studies. Hypertension is the main modifiable risk factor but other risk factors such as HIV are important while, certainly in rural populations, raised cholesterol remains rare as does carotid artery stenosis and history of transient ischemic attack. Other vascular disease such as ischemic heart disease and peripheral vascular disease is also less common.

CONCLUSIONS

There is already a large burden relating to stroke in sub-Saharan Africa and this will only escalate further as the population ages. Hypertension is the biggest risk factor for mortality worldwide and in sub-Saharan Africa prevalence rates are very high with the majority of people suffering with stroke not being diagnosed with their hypertension prior to their stroke. The most important challenge is to improve primary prevention for which improving diagnosis and control rates for hypertension is the number one priority. For those who do have stroke there is a need to increase the number of suitably staffed stroke units as these have been shown to have a very large impact on improving both mortality and morbidity in high income countries. There are still many unanswered questions and a need for more research throughout sub-Saharan Africa on risk factors, and treatment, for stroke.

Younger age of stroke in low-middle income countries is related to healthcare access and quality

Stroke is the second leading cause of mortality globally with higher burden and younger age in low‐middle income countries (LMICs) than high‐income countries (HICs). However, it is unclear to what extent differences in healthcare access and quality (HAQ) and prevalence of risk factors between LMICs and HICs contribute to younger age of stroke in LMICs. In this systematic review, we conducted meta‐analysis of 67 articles and compared the mean age of stroke between LMICs and HICs, before and after adjusting for HAQ index. We also compared the prevalence of main stroke risk factors between HICs and LMICs. The unadjusted mean age of stroke in LMICs was significantly lower than HICs (63.1 vs. 68.6), regardless of gender (63.9 vs. 66.6 among men, and 65.6 vs. 70.7 among women) and whether data were collected in population‐ (64.7 vs. 69.5) or hospital‐based (62.6 vs. 65.9) studies (all p < 0.01). However, after adjusting for HAQ index, the difference in the mean age of stroke between LMICs and HICs was not significant (p ≥ 0.10), except among women (p = 0.048). In addition, while the median prevalence of hypertension in LMICs was 23.4% higher than HICs, the prevalence of all other risk factors was lower in LMICs than HICs. Our findings suggest a much larger contribution of HAQ to the younger mean age of stroke in LMICs, as compared with other potential factors. Additional studies on stroke care quality and accessibility are needed in LMICs.

Digital Health in Primordial and Primary Stroke Prevention: A Systematic Review

The stroke burden continues to grow across the globe, disproportionally affecting developing countries. This burden cannot be effectively halted and reversed without effective and widely implemented primordial and primary stroke prevention measures, including those on the individual level. The unprecedented growth of smartphone and other digital technologies with digital solutions are now being used in almost every area of health, offering a unique opportunity to improve primordial and primary stroke prevention on the individual level. However, there are several issues that need to be considered to advance development and use this important digital strategy for primordial and primary stroke prevention. Using the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines we provide a systematic review of the current knowledge, challenges, and opportunities of digital health in primordial and primary stroke prevention.

Risk Factors for Stroke in HIV-Positive and-Negative Patients in Pretoria, South Africa

OBJECTIVES

Low- to middle-income countries experience a marked rise in cardiovascular diseases, and have the highest incidence of HIV infection. Stroke data in HIV-positive patients is still scarce. This study compares risk factors and types of stroke between HIV-positive and -negative patients in South Africa.

MATERIALS AND METHODS

We conducted a cross-sectional study at Kalafong Provincial Tertiary Hospital in Pretoria over a 10-month period. All adult patients presenting with an acute stroke were included.

RESULTS

One hundred and forty consecutive patients with stroke were included, 23% were HIV-positive. The average age in the HIV-positive group was 41 years, compared to 61 years in the HIV-negative group (p < 0.01). Ischemic infarcts occurred in 80.7 and 19.3% were hemorrhagic, with no significant difference between the HIV-positive and -negative group (ischemic: 81% vs 80%; hemorrhagic: 19% vs 20%; p = 0.55). Small vessel infarcts occurred more frequently in HIV-positive patients (25% vs 9.3%; p < 0.02). While 78% of HIV-positive patients presented with concomitant infections, these were found in only 23% of HIV-negative patients (P < 0.001). Hypertension (81% vs 37.5%; p = 0.01) and dyslipidemia (62% vs 38%; p = 0.01) were more prevalent in the HIV-negative patients. Confounding variables were gender and age. Although more than half of the HIV-positive patients were on antiretroviral therapy, the majority (62.5%) showed virological non-suppression.

CONCLUSIONS

HIV infection occurred in almost one-quarter of stroke patients and was seen more in the younger age group. Small vessel ischemic infarcts and underlying infections were more common in HIV-positive patients. The high number of HIV-positive patients with virological non-suppression is concerning and needs to be addressed.

Stroke in Africa: profile, progress, prospects and priorities

Stroke is a leading cause of disability, dementia and death worldwide. Approximately 70% of deaths from stroke and 87% of stroke-related disability occur in low-income and middle-income countries. At the turn of the century, the most common diseases in Africa were communicable diseases, whereas non-communicable diseases, including stroke, were considered rare, particularly in sub-Saharan Africa. However, evidence indicates that, today, Africa could have up to 2-3-fold greater rates of stroke incidence and higher stroke prevalence than western Europe and the USA. In Africa, data published within the past decade show that stroke has an annual incidence rate of up to 316 per 100,000, a prevalence of up to 1,460 per 100,000 and a 3-year fatality rate greater than 80%. Moreover, many Africans have a stroke within the fourth to sixth decades of life, with serious implications for the individual, their family and society. This age profile is particularly important as strokes in younger people tend to result in a greater loss of self-worth and socioeconomic productivity than in older individuals. Emerging insights from research into stroke epidemiology, genetics, prevention, care and outcomes offer great prospects for tackling the growing burden of stroke on the continent. In this article, we review the unique profile of stroke in Africa and summarize current knowledge on stroke epidemiology, genetics, prevention, acute care, rehabilitation, outcomes, cost of care and awareness. We also discuss knowledge gaps, emerging priorities and future directions of stroke medicine for the more than 1 billion people who live in Africa.

Stroke incidence and case fatality: a 9-year prospective population-based study in an elderly population of Bagheria, Italy

Background

The incidence of stroke in high-income countries has been on the decline; however, few epidemiological surveys have been conducted in recent years to specifically estimate the incidence along with outcome of stroke, in Italy. This study aimed to examine the incidence and case fatality rates of stroke in an elderly Italian population.

Methods

A cohort of 2200 people > 65 years was randomly stratified from the total elderly population of Bagheria, Italy. A 9-year prospective population-based study was performed (19,800 person/years).

Results

We identified 112 first-ever strokes, 53 females and 59 males: 82 (73.1%) ischemic, 13(11.6%) intracerebral haemorrhages, 6 (5.35%) subarachnoid haemorrhages, while 11(9.8%) were classified as undetermined strokes. The crude overall annual incidence was 5.65 per 1000 (95%CI: 4.61 to 6.70) for first-ever stroke. The overall crude incidence rates were 4.74 per 1000 (5.08 for males and 4.46 for females) for ischemic stroke, 0.65 (0.99 for males and 0.37 for females) for intracerebral haemorrhage, and 0.03 for subarachnoid haemorrhage. The incidence rate for first-ever stroke was 5.4 per 1000 (95% CI: 5.36 to 5.45) after adjustment for the 2015 World population and 5.56 (95% CI: 5.52 to 5.61), compared to the 2015 European population. Overall case fatality rates for first-ever stroke was 8.19% at 28 days and 24.1% at 1 year.

Conclusion

Our study shows that in the elderly population investigated, stroke incidence and case fatality rates resulted being lower, compared to those from Italian and most European populations. Similar to previous studies, these rates increased linearly with age and were higher in males.

Protocol for a systematic review on tertiary prevention interventions for patients with stroke in African countries

INTRODUCTION

Stroke is one of the common causes of mortality, morbidity and years of life lost worldwide. Baseline research on stroke epidemiology, prevention, acute and rehabilitative interventions in Africa is necessary to approach specific contexts and regional circumstances. Most studies on stroke have been conducted in high-income countries. This protocol describes the methodology to summarise the best available evidence on tertiary preventive strategies like rehabilitation interventions for patients with stroke in African contexts.

METHODS AND ANALYSIS

We will include experimental studies and prospective cohort studies conducted in African countries. A protocol has been registered in PROSPERO. Systematic search will include eight electronic databases (MEDLINE, Embase, the Cochrane Library, CINAHL, Cab-Direct, Physiotherapy Evidence Database (PEDro), African Journals Online and African Index Medicus) and the International Clinical Trials Register Platform and base on predefined search terms. We will search from inception of each database and repeat this strategy 3 months prior to review submission. Details of all eligible studies will be extracted and risk of bias for outcomes on global disability or dependence in daily living will be assessed. Main aim of this systematic review is to provide a narrative description of evidence on tertiary prevention strategies (including rehabilitation) for stroke. This description will be visualised in structured tables to aid interpretation of study characteristics, intervention effects and certainty of the evidence.

ETHICS AND DISSEMINATION

No ethical approval is necessary. Results will be presented in national and international conferences and published in a peer-reviewed journal.

PROSPERO REGISTRATION NUMBER

CRD42020159125.

Care of stroke survivors in community: a case study of rural Thai community

Purpose

This study aims to describe survivors of stroke circumstances, issues with providing care for survivors of stroke and services expected by caregivers and survivors of stroke.

Design/methodology/approach

A qualitative research design was conducted in Singburi Province. Data collection methods included in-depth interviews, focus groups and participatory observations. Semi-structured in-depth interview guides, quality-of-life scale and depression scale were used to collect data from survivors of stroke, their caregivers, health personnel, local governors and village health volunteers. Naturalistic research tradition was used for qualitative data analysis and descriptive statistics for quantitative data analysis.

Findings

The majority of survivors of stroke had hemiplegic limb and severe deficits in their activities of daily living. Caregivers were family members, and they often developed depression. Issues with providing care to stroke survivors included lack of knowledge about stroke and home care, inadequacy and discontinuity of care and the shortage of stroke care personnel in the community. A stakeholder's expected stroke services included the provision of effective continuing care, community participation in care and enhancing the village health volunteer's capacity.

Originality/value

This study illustrated the stroke service systems in rural Thai communities. The study's findings could be applied when planning future research using community participation to test a model of care for stroke survivors to promote better outcomes and be responsive to the needs of stroke survivors, especially those who are disabled.

Conceptual framework for establishing the African Stroke Organization

Africa is the world's most genetically diverse, second largest, and second most populous continent, with over one billion people distributed across 54 countries. With a 23% lifetime risk of stroke, Africa has some of the highest rates of stroke worldwide and many occur in the prime of life with huge economic losses and grave implications for the individual, family, and the society in terms of mental capital, productivity, and socioeconomic progress. Tackling the escalating burden of stroke in Africa requires prioritized, multipronged, and inter-sectoral strategies tailored to the unique African epidemiological, cultural, socioeconomic, and lifestyle landscape. The African Stroke Organization (ASO) is a new pan-African coalition that brings together stroke researchers, clinicians, and other health-care professionals with participation of national and regional stroke societies and stroke support organizations. With a vision to reduce the rapidly increasing burden of stroke in Africa, the ASO has a four-pronged focus on (1) research, (2) capacity building, (3) development of stroke services, and (4) collaboration with all stakeholders. This will be delivered through advocacy, awareness, and empowerment initiatives to bring about people-focused changes in policy, clinical practice, and public education. In the spirit of the African philosophy of Ubuntu "I am because we are," the ASO will harness the power of diversity, inclusiveness, togetherness, and team work to build a strong, enduring, and impactful platform for tackling stroke in Africa.

Improving the quality of care for people who had a stroke in a low-/middle-income country: A qualitative analysis of health-care professionals' perspectives

Background and Objective

Efforts to improve the adoption of evidence‐based interventions for optimal patient outcomes in low‐/middle‐income countries (LMICs) are persistently hampered by a plethora of barriers. Yet, little is known about strategies to address such barriers to improve quality stroke care. This study seeks to explore health professionals’ views on strategies to improve quality stroke care for people who had a stroke in a LMIC.

Methods

A qualitative interview study design was adopted. A semi‐structured interview guide was used to conduct in‐depth interviews among forty stroke care providers in major referral centres in Ghana. Participants were from nursing, medical, specialist and allied health professional groups. A purposive sample was recruited to share their views on practical strategies to improve quality stroke care in clinical settings. A thematic analysis approach was utilized to inductively analyse the data.

Results

A number of overarching themes of strategies to improve quality stroke care were identified: computerization and digitization of medical practice, allocation of adequate resources, increase the human resource capacity to deliver stroke care, development of clinical guideline/treatment protocols, institutionalization of multidisciplinary care and professional development opportunities. These strategies were however differentially prioritized among different categories of stroke care providers.

Conclusion

Closing the gap between existing knowledge on how to improve quality of stroke care in LMICs has the potential to be successful if unique and context‐specific measures from the views of stroke care providers are considered in developing quality improvement strategies and health systems and policy reforms. However, for optimal outcomes, further research into the effectiveness and feasibility of the proposed strategies by stroke care providers is needed.

Education-based Solutions to the Global Burden of Neurosurgical Disease

OBJECTIVE

Low- and middle-income countries continue to suffer from a lack of access to basic neurosurgical care. The 2015 Lancet Commission on Global Surgery estimated essential surgical care was lacking to 5 billion people and that 143 million essential surgeries were not performed annually. A significant part of this need is neurosurgical care. Countries lacking basic neurosurgical services cannot have a true trauma system, or complete care for tumor, stroke, pain, and congenital defects in children. Episodic service missions from developed countries cannot fill these large gaps. To maximize the impact of global neurosurgery, the framework through which humanitarian neurosurgeons respond to international need should incorporate sustainable practices that empower the recipient population.

METHODS

A historical and anecdotal review of global neurosurgery.

RESULTS

The success of sustainable, locally championed neurosurgery educational programs will be dependent on the simultaneous, parallel development of anesthesia, critical care, nursing, and biomedical services. Each of these disciplines will reciprocally benefit from these neurosurgical programs. These programs cannot exist in a vacuum. They will require the thoughtful collaboration of all major neurosurgical societies with a humanitarian emphasis while championing the local surgeons in the area of need who must assume leadership to achieve a self-sustaining program.

CONCLUSIONS

To meet the global need for neurosurgical care, self-sustaining neurosurgical programs must be locally developed in the countries of need. International support must be built on "Service through Education" rather the service alone.

Global, regional, and national burden of stroke, 1990-2016: a systematic analysis for the Global Burden of Disease Study 2016

BACKGROUND

Stroke is a leading cause of mortality and disability worldwide and the economic costs of treatment and post-stroke care are substantial. The Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) provides a systematic, comparable method of quantifying health loss by disease, age, sex, year, and location to provide information to health systems and policy makers on more than 300 causes of disease and injury, including stroke. The results presented here are the estimates of burden due to overall stroke and ischaemic and haemorrhagic stroke from GBD 2016.

METHODS

We report estimates and corresponding uncertainty intervals (UIs), from 1990 to 2016, for incidence, prevalence, deaths, years of life lost (YLLs), years lived with disability (YLDs), and disability-adjusted life-years (DALYs). DALYs were generated by summing YLLs and YLDs. Cause-specific mortality was estimated using an ensemble modelling process with vital registration and verbal autopsy data as inputs. Non-fatal estimates were generated using Bayesian meta-regression incorporating data from registries, scientific literature, administrative records, and surveys. The Socio-demographic Index (SDI), a summary indicator generated using educational attainment, lagged distributed income, and total fertility rate, was used to group countries into quintiles.

FINDINGS

In 2016, there were 5·5 million (95% UI 5·3 to 5·7) deaths and 116·4 million (111·4 to 121·4) DALYs due to stroke. The global age-standardised mortality rate decreased by 36·2% (-39·3 to -33·6) from 1990 to 2016, with decreases in all SDI quintiles. Over the same period, the global age-standardised DALY rate declined by 34·2% (-37·2 to -31·5), also with decreases in all SDI quintiles. There were 13·7 million (12·7 to 14·7) new stroke cases in 2016. Global age-standardised incidence declined by 8·1% (-10·7 to -5·5) from 1990 to 2016 and decreased in all SDI quintiles except the middle SDI group. There were 80·1 million (74·1 to 86·3) prevalent cases of stroke globally in 2016; 41·1 million (38·0 to 44·3) in women and 39·0 million (36·1 to 42·1) in men.

INTERPRETATION

Although age-standardised mortality rates have decreased sharply from 1990 to 2016, the decrease in age-standardised incidence has been less steep, indicating that the burden of stroke is likely to remain high. Planned updates to future GBD iterations include generating separate estimates for subarachnoid haemorrhage and intracerebral haemorrhage, generating estimates of transient ischaemic attack, and including atrial fibrillation as a risk factor.

FUNDING

Bill & Melinda Gates Foundation.

Anthology of stroke epidemiology in the 20th and 21st centuries: Assessing the past, the present, and envisioning the future

This narrative overview of stroke epidemiology shows dramatic changes in stroke incidence, prevalence, mortality, disability, and the understanding of risk factors and primary stroke prevention strategies over the last few decades. Likely future directions of stroke epidemiology and prevention are outlined.