Stroke case fatality in sub-Saharan Africa: Systematic review and meta-analysis

Background The burden of stroke is high in sub-Saharan Africa; however, few data are available on long-term mortality. Objective To estimate over one-month stroke case fatality in sub-Saharan Africa. Methods A systematic review and meta-analysis were performed according to meta-analysis of observational studies in epidemiology and Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines (PROSPERO protocol: CRD42020192439), on five electronic databases (PubMed, Science direct, AJOL, EMBASE, and Web of Sciences). We searched all studies on stroke case fatality over one month in sub-Saharan Africa published between 1st January 2000 and 31st December 2019. Results We included 91 studies with a total of 34,362 stroke cases. The one-month pooled stroke case-fatality rate was 24.1% [95% CI: 21.5–27.0] and 33.2% [95% CI: 23.6–44.5] at one year. At three and five years, the case-fatality rates were respectively 40.1% [95% CI: 20.8–63.0] and 39.4% [95% CI: 14.3–71.5] with high heterogeneity. Hemorrhagic stroke was associated with a higher risk of mortality at one month, but ischemic stroke increased the risk of mortality over six months. Diabetes was associated with poor prognosis at 6 and 12 months with odds ratios of 1.64 [95% CI: 1.22–2.20] and 1.85 [1.25–2.75], respectively. Conclusion The stroke case fatality over one month was very high, compared to case fatalities reported in Western countries and can be explained by a weak healthcare systems and vascular risk factors.

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Enteric pathogens associated with gastroenteritis among children under 5 years in sub-Saharan Africa: a systematic review and meta-analysis

Epidemiology and Infection ◽

10.1017/s0950268820000618 ◽

2020 ◽

Vol 148 ◽

Cited By ~ 3

Author(s):

T. B. Oppong ◽

H. Yang ◽

C. Amponsem-Boateng ◽

E. K. D Kyere ◽

T. Abdulai ◽

...

Keyword(s):

Systematic Review ◽

Meta Analysis ◽

Acute Diarrhoea ◽

Cochrane Collaboration ◽

Original Data ◽

Health Condition ◽

Sub Saharan Africa ◽

Sub Saharan ◽

Meta Analyses ◽

Children Under 5

Abstract Gastroenteritis remains a serious health condition among children under 5 years especially in Africa. We conducted a systematic review and meta-analysis to investigate the aetiologic pathogens of gastroenteritis in the region. We did a systematic search for articles with original data on the aetiology of gastroenteritis and acute diarrhoea among children younger than 5 years. Pooled results were extracted and analysed in STATA version 12.0 using random-effects for statistical test for homogeneity following the guidelines provided in the Cochrane Collaboration and Preferred reporting items for systematic reviews and meta-analyses. Overall, viruses accounted for 50.2% of the cases followed by bacteria with 31.6% of the cases. Parasites accounted for 12.1% of the case. Rotavirus was the most common cause of acute diarrhoea in all regions resulting in 29.2% of the cases followed by E. coli (15.6%) of diarrhoeal cases and Adenovirus (10.8%). The most prevalent parasite detected was Giardia lamblia (7.3%). Acute diarrhoea remains rampant with Rotavirus still being the major pathogen responsible for the disease in children less than 5 years old despite the introduction of vaccine. It is recommended that the vaccine should be promoted much more widely in the region.

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Treatment outcomes in adult tuberculous meningitis: a systematic review and meta-analysis

Open Forum Infectious Diseases ◽

10.1093/ofid/ofaa257 ◽

2020 ◽

Cited By ~ 3

Author(s):

Anna M Stadelman ◽

Jayne Ellis ◽

Thomas H A Samuels ◽

Ernest Mutengesa ◽

Joanna Dobbin ◽

...

Keyword(s):

Systematic Review ◽

Treatment Outcomes ◽

Tuberculous Meningitis ◽

Meta Analysis ◽

Sub Saharan Africa ◽

Hiv Positive ◽

Significant Heterogeneity ◽

Hiv Positive Adults ◽

Sub Saharan ◽

Meta Analyses

Abstract Background There is substantial variation in the reported treatment outcomes for adult tuberculous meningitis (TBM). Data on survival and neurological disability by continent and HIV serostatus are scarce. Methods We performed a systematic review and meta-analysis to characterize treatment outcomes for adult TBM. Following a systematic literature search (MEDLINE and EMBASE), studies underwent duplicate screening by independent reviewers in two stages to assess eligibility for inclusion. Two independent reviewers extracted data from included studies. We employed a random effects model for all meta-analyses. We evaluated heterogeneity by the I2 statistic. Results We assessed 2,197 records for eligibility; 39 primary research articles met our inclusion criteria reporting on treatment outcomes for 5,752 adults with TBM. The commonest reported outcome measure was six-month mortality. Pooled six-month mortality was 24% and showed significant heterogeneity (I2 >95%; p<0·01). Mortality ranged from 2% to 67% in Asian studies and from 23% to 80% in sub-Saharan African studies. Mortality was significantly worse in HIV-positive adults at 57% (95%CI; 48-67%), compared with 16% (95%CI; 10-24%) in HIV-negative adults (p<0·01). Physical disability was reported in 32% (95%CI; 22-43%) of adult TBM survivors. There was considerable heterogeneity between studies in all meta-analyses with I2 statistics consistently >50%. Conclusions Mortality in adult TBM is high and varies considerably by continent and HIV-status. The highest mortality is amongst HIV-positive adults in sub-Saharan Africa. Standardized reporting of treatment outcomes will be essential to improve future data quality and increase potential for data sharing, meta-analyses, and facilitating multi-center tuberculosis research to improve outcomes.

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Prevalence of uncontrolled hypertension in people with comorbidities in sub-Saharan Africa: a systematic review and meta-analysis

BMJ Open ◽

10.1136/bmjopen-2020-045880 ◽

2021 ◽

Vol 11 (12) ◽

pp. e045880

Author(s):

Shukri F Mohamed ◽

Olalekan A Uthman ◽

Martin K Mutua ◽

G Asiki ◽

Mustapha S Abba ◽

...

Keyword(s):

Atrial Fibrillation ◽

Systematic Review ◽

Kidney Disease ◽

Meta Analysis ◽

Sub Saharan Africa ◽

Uncontrolled Hypertension ◽

Diabetic Patients ◽

Registration Number ◽

Sub Saharan ◽

Meta Analyses

BackgroundThe burden of uncontrolled hypertension in sub-Saharan Africa (SSA) is high and hypertension is known to coexist with other chronic diseases such as kidney disease, diabetes among others. This is the first systematic review and meta-analysis to determine the burden of uncontrolled hypertension among patients with comorbidities in SSA.MethodsA comprehensive search was conducted on MEDLINE, Excerpta Medica Database (Embase) and Web of Science to identify all relevant articles published between 1 January 2000 and 17 June 2021. We included studies that reported on the prevalence of uncontrolled hypertension among people in SSA who report taking antihypertensive treatment and have another chronic condition. A random-effects meta-analysis was performed to obtain the pooled estimate of the prevalence of uncontrolled hypertension among patients with comorbid conditions while on treatment across studies in SSA.ResultsIn all, 20 articles were included for meta-analyses. Eleven articles were among diabetic patients, five articles were among patients with HIV, two were among patients with stroke while chronic kidney disease and atrial fibrillation had one article each. The pooled prevalence of uncontrolled hypertension among patients with comorbidities was 78.6% (95% CI 71.1% to 85.3%); I² 95.9%, varying from 73.1% in patients with stroke to 100.0% in patients with atrial fibrillation. Subgroup analysis showed differences in uncontrolled hypertension prevalence by various study-level characteristicsConclusionThis study suggests a high burden of uncontrolled hypertension in people with comorbidities in SSA. Strategies to improve the control of hypertension among people with comorbidities are needed.PROSPERO registration numberCRD42019108218.

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The incidence and mortality of COVID-19 related TB infection in Sub-Saharan Africa: A systematic review and meta-analysis

10.1101/2022.01.11.22269065 ◽

2022 ◽

Author(s):

Jacques JL Tamuzi ◽

Gomer Lulendo ◽

Patrick Mbuesse

Keyword(s):

Systematic Review ◽

Meta Analysis ◽

Case Fatality ◽

Sub Saharan Africa ◽

Combination Method ◽

Diagnostic Tools ◽

Post Mortem ◽

Incidence And Mortality ◽

Meta Regression ◽

Sub Saharan

Background Coronavirus disease 2019 (COVID-19) is also associated with other co-morbidities among with previous and current pulmonary tuberculosis (PTB). PTB is a risk factor for COVID-19, both in terms of severity and mortality, regardless of human immunodeficiency virus (HIV) status. However, there is less information available on COVID-19 associated with PTB in point of view incidence and mortality rates in sub-Saharan Africa (SSA) as a high burden TB region. This systematic review served to provide data synthesis of available evidence on COVID-19/PTB incidence and case fatality rates, and mortality rate found in clinical and post-mortem COVID-19/PTB diagnostics in SSA. Methods We conducted a systematic electronic search in the PubMed, Medline, Google Scholar, Medrxix and COVID-19 Global literature on coronavirus disease databases for studies including COVID-19 associated with PTB in sub-Saharan Africa. The main outcomes were the proportion of people with COVID-19 associated to current /or previous PTB and the case fatality associated to COVID-19/PTB. The combination method was based on methodological similarities in the included random effect model studies using Prometa 3 software. We further undertook sensitivity analysis and meta-regression. Results From the 548 references extracted by the literature search, 25 studies were selected and included in the meta-analysis with a total of 191, 250 COVID-19 infected patients and 11, 452 COVID-19 deaths. The pooled COVID-19/PTB incidence was 2% [1%-3%] and mortality of 10% [4%-20%]. The pooled estimates for case fatality rate among COVID-19/PTB were 6% [3%-11%] for clinical PTB diagnostic and 26% [14%-48%] for post-mortem PTB diagnostic. Meta-regression model including the effect sizes and cumulative COVID-19 cases (P= 0.032), HIV prevalence (P= 0.041) and TB incidence (P= 0.002) to explained high heterogeneity between studies. Conclusion As a summary, the incidence of TB associated with COVID-19 and case fatality rates are higher in SSA. However, COVID-19 associated to TB may be underreported in the studies conducted in SSA as the post-mortem TB diagnostic was higher. Large-scale cohort studies that adequately clear tool on previous and/or current TB diagnostic tools are required to confirmed COVID-19/TB incidence and case fatality in SSA.

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Prevalence and factors associated with medication adherence among patients with hypertension in sub-Saharan Africa: protocol for a systematic review and meta-analysis

BMJ Open ◽

10.1136/bmjopen-2017-020715 ◽

2018 ◽

Vol 8 (3) ◽

pp. e020715 ◽

Cited By ~ 3

Author(s):

Valirie Ndip Agbor ◽

Noah Fongwen Takah ◽

Leopold Ndemnge Aminde

Keyword(s):

Systematic Review ◽

Meta Analysis ◽

Pressure Control ◽

Sub Saharan Africa ◽

Published Data ◽

High Morbidity ◽

Factors Associated ◽

Adherence To Medication ◽

Sub Saharan ◽

Meta Analyses

IntroductionHypertension is the leading cardiovascular risk factor globally, associated with a high morbidity and mortality. The high prevalence of hypertension in sub-Saharan Africa (SSA) is associated with contrastingly low awareness, treatment and control rates. Adherence to medication remains a major determinant of optimal blood pressure control. This systematic review aims to determine the prevalence, and factors associated with adherence to antihypertensive pharmacotherapy among patients with hypertension in SSA.Methods and analysisWe will include studies published in Africa up to 31 December 2017. The following databases will be searched: PubMed, Embase, SCOPUS and Web of Science to identify potential studies without language restriction. To minimise chances of missing studies, resources specific to African literature such as WHO AFROLIB, African Index Medicus and African Journals Online will also be searched. Two reviewers will independently screen studies, extract data and critically appraise included studies for risk of bias, and a third reviewer will resolve discrepancies. A random-effects meta-analysis is planned to pool study-specific estimates to obtain a summary measure presented in Forest plots. Heterogeneity of included studies will be assessed using the χ2test on Cochrane’s Q statistic and quantified using I2. Publication bias will be assessed using the Egger’s test and funnel plots. This protocol has been prepared according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses for Protocols 2015 statement.Ethical and disseminationAn ethical approval is not required for the proposed study, as it will be based on already published data. The end report will be presented at conferences and published in a peer-reviewed journal.PROSPERO registration numberCRD42017079838.

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A systematic review and network meta-analyses to assess the effectiveness of HIV self-testing distribution strategies

Clinical Infectious Diseases ◽

10.1093/cid/ciab029 ◽

2021 ◽

Author(s):

Ingrid Eshun-Wilson ◽

Muhammad S Jamil ◽

Witzel T. Charles ◽

Dave V Glidden ◽

Johnson Cheryl ◽

...

Keyword(s):

Systematic Review ◽

Hiv Testing ◽

Meta Analysis ◽

Sub Saharan Africa ◽

Web Based ◽

Standard Testing ◽

Self Testing ◽

Testing Uptake ◽

Sub Saharan ◽

Meta Analyses

Abstract Background We conducted a systematic review and network meta-analysis to identify which HIV self-testing (HIVST) distribution strategies are most effective. Methods We abstracted data from randomized controlled trials and observational studies published between June 4, 2006 and June 4, 2019. Results We included 33 studies, yielding six HIVST distribution strategies. All distribution strategies increased testing uptake compared to standard testing: in sub-Saharan Africa, partner HIVST distribution ranked highest (78% probability); in North America, Asia and the Pacific regions, web-based distribution ranked highest (93% probability), and facility based distribution ranked second in all settings. Across HIVST distribution strategies HIV positivity and linkage was similar to standard testing. Conclusion A range of HIVST distribution strategies are effective in increasing HIV testing. HIVST distribution by sexual partners, web-based distribution, as well as health facility distribution strategies should be considered for implementation to expand the reach of HIV testing services.

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Predictors of lost to follow up from antiretroviral therapy among adults in sub-Saharan Africa: a systematic review and meta-analysis

Infectious Diseases of Poverty ◽

10.1186/s40249-021-00822-7 ◽

2021 ◽

Vol 10 (1) ◽

Author(s):

Hafte Kahsay Kebede ◽

Lillian Mwanri ◽

Paul Ward ◽

Hailay Abrha Gesesew

Keyword(s):

Risk Factors ◽

Systematic Review ◽

Meta Analysis ◽

Sub Saharan Africa ◽

Hiv Care ◽

Care Services ◽

Validity Assessment ◽

Sub Saharan ◽

Lost To Follow Up

Abstract Background It is known that ‘drop out’ from human immunodeficiency virus (HIV) treatment, the so called lost-to-follow-up (LTFU) occurs to persons enrolled in HIV care services. However, in sub-Saharan Africa (SSA), the risk factors for the LTFU are not well understood. Methods We performed a systematic review and meta-analysis of risk factors for LTFU among adults living with HIV in SSA. A systematic search of literature using identified keywords and index terms was conducted across five databases: MEDLINE, PubMed, CINAHL, Scopus, and Web of Science. We included quantitative studies published in English from 2002 to 2019. The Joanna Briggs Institute Meta-Analysis of Statistics Assessment and Review Instrument (JBI-MAStARI) was used for methodological validity assessment and data extraction. Mantel Haenszel method using Revman-5 software was used for meta-analysis. We demonstrated the meta-analytic measure of association using pooled odds ratio (OR), 95% confidence interval (CI) and heterogeneity using I2 tests. Results Thirty studies met the search criteria and were included in the meta-analysis. Predictors of LTFU were: demographic factors including being: (i) a male (OR = 1.2, 95% CI 1.1–1.3, I2 = 59%), (ii) between 15 and 35 years old (OR = 1.3, 95% CI 1.1–1.3, I2 = 0%), (iii) unmarried (OR = 1.2, 95% CI 1.2–1.3, I2 = 21%), (iv) a rural dweller (OR = 2.01, 95% CI 1.5–2.7, I2 = 40%), (v) unemployed (OR = 1.2, 95% CI 1.04–1.4, I2 = 58%); (vi) diagnosed with behavioral factors including illegal drug use(OR = 13.5, 95% CI 7.2–25.5, I2 = 60%), alcohol drinking (OR = 2.9, 95% CI 1.9–4.4, I2 = 39%), and tobacco smoking (OR = 2.6, 95% CI 1.6–4.3, I2 = 74%); and clinical diagnosis of mental illness (OR = 3.4, 95% CI 2.2–5.2, I2 = 1%), bed ridden or ambulatory functional status (OR = 2.2, 95% CI 1.5–3.1, I2 = 74%), low CD4 count in the last visit (OR = 1.4, 95% CI 1.1–1.9, I2 = 75%), tuberculosis co-infection (OR = 1.2, 95% CI 1.02–1.4, I2 = 66%) and a history of opportunistic infections (OR = 2.5, 95% CI 1.7–2.8, I2 = 75%). Conclusions The current review identifies demographic, behavioral and clinical factors to be determinants of LTFU. We recommend strengthening of HIV care services in SSA targeting the aforementioned group of patients. Trial registration Protocol: the PROSPERO Registration Number is CRD42018114418

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Sarcopenia Is Associated with Mortality in Adults: A Systematic Review and Meta-Analysis

Gerontology ◽

10.1159/000517099 ◽

2021 ◽

pp. 1-16

Author(s):

Jane Xu ◽

Ching S. Wan ◽

Kiriakos Ktoris ◽

Esmee M. Reijnierse ◽

Andrea B. Maier

Keyword(s):

Systematic Review ◽

Working Group ◽

Meta Analysis ◽

Nursing Home Residents ◽

Community Dwelling ◽

Risk Of Mortality ◽

European Working ◽

Subgroup Analyses ◽

Meta Analyses

Background: Sarcopenia can predispose individuals to falls, fractures, hospitalization, and mortality. The prevalence of sarcopenia depends on the population studied and the definition used for the diagnosis. Objective: This systematic review and meta-analysis aimed to investigate the association between sarcopenia and mortality and if it is dependent on the population and sarcopenia definition. Methods: A systematic search was conducted in MEDLINE, EMBASE, and Cochrane from 1 January 2010 to 6 April 2020 for articles relating to sarcopenia and mortality. Articles were included if they met the following criteria – cohorts with a mean or median age ≥18 years and either of the following sarcopenia definitions: Asian Working Group for Sarcopenia (AWGS and AWGS2019), European Working Group on Sarcopenia in Older People (EWGSOP and EWGSOP2), Foundation for the National Institutes of Health (FNIH), International Working Group for Sarcopenia (IWGS), or Sarcopenia Definition and Outcomes Consortium (SDOC). Hazard ratios (HR) and odds ratios (OR) were pooled separately in meta-analyses using a random-effects model, stratified by population (community-dwelling adults, outpatients, inpatients, and nursing home residents). Subgroup analyses were performed for sarcopenia definition and follow-up period. Results: Out of 3,025 articles, 57 articles were included in the systematic review and 56 in the meta-analysis (42,108 participants, mean age of 49.4 ± 11.7 to 86.6 ± 1.0 years, 40.3% females). Overall, sarcopenia was associated with a significantly higher risk of mortality (HR: 2.00 [95% CI: 1.71, 2.34]; OR: 2.35 [95% CI: 1.64, 3.37]), which was independent of population, sarcopenia definition, and follow-up period in subgroup analyses. Conclusions: Sarcopenia is associated with a significantly higher risk of mortality, independent of population and sarcopenia definition, which highlights the need for screening and early diagnosis in all populations.

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