Effectiveness of COVID-19 Vaccines and Post-vaccination SARS-COV 2 Infection, Hospitalization, and Mortality: a Systematic Review and Meta-analysis of Observational Studies

Introduction & Objective: Vaccination is one of the most important and effective ways of preventing infectious diseases, and has recently been used in the COVID-19 epidemic and pandemic. The present meta-analysis study aimed to evaluate the effectiveness of COVID-19 vaccines in reducing the incidence of infection, hospitalization, and mortality in observational studies. Materials and Methods: A systematic search was performed independently in Scopus, PubMed, ProQuest, and Google Scholar electronic databases as well as Preprint servers using the keywords under study. The heterogeneity of the studies was assessed using I2 and χ2 statistics, according to which the I2 of > 50% and P-value <0.1 was reported as heterogeneity of the studies. In addition, the Pooled Vaccine Effectiveness (PVE) obtained from the studies was calculated by converting (1- Pooled estimate * 100%) based on the type of outcome. Results: A total of 54 records were included in this meta-analysis. The rate of PVE against SARS-COV 2 infection was about 71% (OR = 0.29, 95% CI: 0.23-0.36) in the first dose and 87% (OR = 0.13, 95% CI: 0.08-0.21) in the second, and the highest effectiveness in the first and second doses was that of BNT162b2 mRNA and combined studies. The PVE versus COVID-19-associated hospitalization was 73% (OR = 0.27, 95% CI: 0.18-0.41) in the first dose and 89% (OR = 0.11, 95% CI: 0.07-0.17) in the second. mRNA-1273 and combined studies in the first dose and ChAdOx1 and mRNA-1273 in the second dose had the highest effectiveness. Regarding the COVID-19-related mortality, PVE was about 28% (HR = 0.39, 95% CI: 0.23-0.45) in the first dose and 89% (HR = 0.11, 95% CI: 0.03-0.43) in the second. Conclusion: The evidence obtained from this study showed that the effectiveness of BNT162b2 mRNA, mRNA-1273, and ChAdOx1 in the first and second doses, and even combined studies were associated with increased effectiveness against SARS-COV2 infection, hospitalization, and death from COVID-19. In addition, considering that the second dose was significantly more efficient than the first one, a booster dose injection could be effective in high-risk individuals. On the other hand, it was important to observe other prevention considerations in the first days after taking the first dose.

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Evidence on the effect of gender of newborn, antenatal care and postnatal care on breastfeeding practices in Ethiopia: a meta-analysis andmeta-regression analysis of observational studies

BMJ Open ◽

10.1136/bmjopen-2018-023956 ◽

2019 ◽

Vol 9 (5) ◽

pp. e023956 ◽

Cited By ~ 2

Author(s):

Tesfa Dejenie Habtewold ◽

Nigussie Tadesse Sharew ◽

Sisay Mulugeta Alemu

Keyword(s):

Systematic Review ◽

Regression Analysis ◽

Antenatal Care ◽

Breast Feeding ◽

Postnatal Care ◽

Observational Studies ◽

Meta Analysis ◽

P Value ◽

Timely Initiation ◽

Breastfeeding Practices

ObjectivesThe aim of this systematic review and meta-analysis was to investigate the association of gender of newborn, antenatal care (ANC) and postnatal care (PNC) with timely initiation of breast feeding (TIBF) and exclusive breastfeeding (EBF) practices in Ethiopia.DesignSystematic review and meta-analysis.Data sourcesTo retrieve all available literature, PubMed, EMBASE, CINAHL, WHO Global Health Library, Web of Science and SCOPUS databases were systematically searched and complemented by manual searches. The search was done from August 2017 to September 2018.Eligibility criteriaAll observational studies including cross-sectional, case-control, cohort studies conducted in Ethiopia from 2000 to 2018 were included. Newcastle-Ottawa Scale was used for quality assessment of included studies.Data extraction and synthesisStudy area, design, population, number of mothers (calculated sample size and participated in the study) and observed frequency data were extracted using Joanna Briggs Institute tool. To obtain the pooled effect size, a meta-analysis using weighted inverse variance random-effects model was performed. Cochran’s Q X2test, τ2and I2statistics were used to test heterogeneity, estimate amount of total/residual heterogeneity and measure variability attributed to heterogeneity, respectively. Mixed-effects meta-regression analysis was done to identify possible sources of heterogeneity. Egger’s regression test at p value threshold ≤0.01 was used to examine publication bias. Furthermore, the trend of evidence over time was examined by performing a cumulative meta-analysis.ResultsOf 523 articles retrieved, 17 studies (n=26 146 mothers) on TIBF and 24 studies (n=17 819 mothers) on EBF were included in the final analysis. ANC (OR=2.24, 95% CI 1.65 to 3.04, p<0.001, I2=90.9%), PNC (OR=1.86, 95% CI 1.41 to 2.47, p<0.001, I2=63.4%) and gender of newborn (OR=1.31, 95% CI 1.01 to 1.68, p=0.04, I2=81.7%) significantly associated with EBF. ANC (OR=1.70, 95% CI 1.10 to 2.65, p=0.02, I2=93.1%) was also significantly associated with TIBF but not with gender of newborn (OR=1.02, 95% CI 0.86 to 1.21, p=0.82, I2=66.2%).ConclusionsIn line with our hypothesis, gender of newborn, ANC and PNC were significantly associated with EBF. Likewise, ANC was significantly associated with TIBF. Optimal care during pregnancy and after birth is important to ensure adequate breast feeding. This meta-analysis study provided up-to-date evidence on breastfeeding practices and its associated factors, which could be useful for breastfeeding improvement initiative in Ethiopia and cross-country and cross-cultural comparison.Trial registration numberCRD42017056768

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Diabetes, Hypertension, Body Mass Index, Smoking and COVID-19-Related Mortality: A Systematic Review and Meta-Analysis of Observational Studies

SSRN Electronic Journal ◽

10.2139/ssrn.3773509 ◽

2021 ◽

Author(s):

Yahya Mahamat Saleh ◽

Thibault Fiolet ◽

Mathieu Edouard Rebeaud ◽

Matthieu Mulot ◽

Anthony Guihur ◽

...

Keyword(s):

Systematic Review ◽

Body Mass Index ◽

Body Mass ◽

Observational Studies ◽

Meta Analysis ◽

Related Mortality

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Determinants of Perinatal birth Asphyxia among Newborns in Ethiopia: A Systematic Review and Meta-analysis of Observational Studies Protocol

10.21203/rs.3.rs-30470/v2 ◽

2020 ◽

Author(s):

Abay Woday ◽

Muluken Dessalegn ◽

Setognal Birara ◽

Kusse Urmale ◽

Gebeyaw Biset ◽

...

Keyword(s):

Systematic Review ◽

Observational Studies ◽

Associated Factors ◽

Meta Analysis ◽

Statistical Significance ◽

Birth Asphyxia ◽

Cochrane Library ◽

P Value ◽

African Countries ◽

Significance Level

Abstract Background: Birth asphyxia among newborns accounted for nearly fifty percent of neonatal mortality in sub-Saharan African countries. This scenario has been worst in Ethiopia where every two out of three deaths attributed to birth asphyxia among these babies. Moreover, studies conducted in Ethiopia are highly variable and inconclusive to estimate the pooled prevalence and risk factors of birth asphyxia. Objective: This study aims to analyses collectively and systematically the prevalence of birth asphyxia and associated factors among newborns in Ethiopia.Methods: The protocol for this review is registered at PROSPERO with registration number CRD42020158224. A comprehensive online databases (PubMed, HINARI, Scopus, EMBASE, Science direct, and Cochrane library database), Google Scholar, African Journals online, other gray and online repository accessed studies will be searched using different search engines. In addition, maternity & infant care databases uploaded at Ethiopian Health Development Journal and Ethiopian Journal of Health Sciences will be searched until June 30, 2020. Newcastle-Ottawa Quality Assessment Scale (NOS) will be used for critical appraisal of studies.. Three reviewers will screen all retrieved articles, conduct data extraction, and then critically appraise all identified studies. All identified observational studies reporting the prevalence of birth asphyxia and associated factors among neonates in Ethiopia will be considered. The analysis of data will be done using STATA 11.0 statistical software. We will demonstrate pooled estimates and determinants of birth asphyxia with effect size and 95% confidence interval. Heterogeneity among the included studies will be assessed through the Cochrane Q-test statistics and I2 test. Publication bias will be checked using funnel plot and egger’s test. Finally, statistical significance level will be declared at a p-value of less than 0.05. Discussion: the result from this systematic review will inform and guide health policy planners to invest limited resources on maternal and neonatal health. Furthermore, it will be a stimulus for future cumulative meta-analysis researchers in developing nations.

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Abstract P232: Psoriasis is Associated with Increased Arterial Stiffness: a Systematic Review and Meta-analysis

Hypertension ◽

10.1161/hyp.68.suppl_1.p232 ◽

2016 ◽

Vol 68 (suppl_1) ◽

Author(s):

Sikarin Upala ◽

Anawin Sanguankeo

Keyword(s):

Systematic Review ◽

Arterial Stiffness ◽

Observational Studies ◽

Meta Analysis ◽

Statistical Significance ◽

Aortic Pulse Wave Velocity ◽

P Value ◽

Original Research ◽

Cvd Risk ◽

Non Invasive

Background: Studies have shown that patients with psoriasis have higher risk of CVD, independent of traditional CVD risk factors. However, pathophysiology of the development of CVD in psoriasis is not well known. Arterial stiffness has been recognized as an independent predictor of cardiovascular risk. It is controversial whether psoriasis and arterial stiffness is associated. In this systematic review and meta-analysis, we sought to assess the hypothesis that patients with psoriasis have increased arterial stiffness compared with controls. Methods: Systematic literature search was performed using MEDLINE and EMBASE databases from inception to May 2016. We included original research publications that contained data on arterial stiffness and psoriasis. Aortic pulse wave velocity (aPWV) is the non-invasive marker for assessment of arterial stiffness. We compared aPWV between patients with psoriasis and controls and estimated the pooled mean difference (MD) and 95% confidence interval (CI) of aPWV using a random-effects model meta-analysis. Results: Data from five observational studies involving 438 participants (233 with psoriasis) were extracted and included in the meta-analysis. Pooled MD of aPWV was 1.17 m/sec higher in patients with psoriasis compared with controls (95% CI: 0.78-1.55, P-value<0.01, I 2 = 69%). There is no change in the direction or statistical significance of MD of aPWV after removing each study at a time in the sensitivity analysis. Conclusion: Psoriasis is associated with increased arterial stiffness. Assessment of arterial stiffness parameters may be important for early detection of cardiovascular deterioration in psoriasis patients.

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Can exposure to panoramic radiographs induce genotoxic effects on the oral epithelium? A systematic review with meta-analysis

Dentomaxillofacial Radiology ◽

10.1259/dmfr.20210149 ◽

2021 ◽

pp. 20210149

Author(s):

Marcos Antônio Lima dos Santos ◽

Graziane Ribeiro Couto ◽

Mark Jon Santana Sabey ◽

Danilo de Paula Ribeiro Borges ◽

Wilton Mitsunari Takeshita

Keyword(s):

Systematic Review ◽

Observational Studies ◽

Meta Analysis ◽

P Value ◽

Oral Epithelium ◽

Genotoxic Effects ◽

Quality Of Evidence ◽

Panoramic Radiographs ◽

Small Effect Size

Radiographic examinations combined with clinical and histological tests play an important role in diagnosing changes in the craniofacial region. Considering that X-radiation is a form of ionizing energy capable of damaging the DNA of individuals, it has been the object of studies since its introduction. The micronucleus test is used to quantify this damage, assessing whether or not chromosomal breakage occurs. Objective: To evaluate, through a systematic review (SR) with meta-analysis, the occurrence of genotoxic effects in the oral epithelium after the exposure of patients to panoramic radiographs. Methods: An SR was performed with the PICOS (Population, Intervention, Comparison, Outcome, and Study design) strategy, aiming to answer the following question: “Can panoramic radiographs induce genotoxic effects on the oral epithelium?” The study was registered in the PROSPERO (International prospective register of systematic reviews) platform. A systematic search was performed in the following electronic databases: PubMed (including MedLine), Scopus, Embase, LILACS, Medline EbscoHost, and Google Scholar. Treatment effects were defined as standardized mean difference (SMD), and 95% confidence intervals (CI) were established. The Joanna Briggs Institute questionnaire for observational studies was applied to assess the risk of bias. The GRADE tool was used to assess the quality of evidence of the SR. Results: A total of 251 potentially relevant studies were selected through the search strategy. After screening titles and abstracts, 11 full-text manuscripts were assessed for eligibility and nine observational studies were included in the meta-analysis. The present study showed an increase in micronuclei after the exposure (SMD = 0.21, 95% CI, 0.03 to 0.28, p = 0.02), with a Tau2index = 0.00, Chi2 = 2.35, and p-value = 0.97. Therefore, the articles selected were considered homogeneous and the I² of 0% indicated low heterogeneity. Conclusion: According to the studies analysed, although the quality of evidence was considered low, panoramic radiographs can cause genotoxic damage in the oral epithelium but with a small effect size.

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The association between dietary inflammatory index and risk of central obesity in adults: An updated systematic review and meta-analysis

International Journal for Vitamin and Nutrition Research ◽

10.1024/0300-9831/a000648 ◽

2020 ◽

Vol 90 (5-6) ◽

pp. 535-552 ◽

Cited By ~ 2

Author(s):

Mahdieh Abbasalizad Farhangi ◽

Mahdi Vajdi

Keyword(s):

Systematic Review ◽

Observational Studies ◽

Central Obesity ◽

Assessment Tool ◽

Weighted Mean Difference ◽

Meta Analysis ◽

Dietary Factors ◽

Cross Sectional ◽

Inflammatory Status ◽

Obesity Indices

Abstract. Backgrounds: Central obesity, as a pivotal component of metabolic syndrome is associated with numerous co-morbidities. Dietary factors influence central obesity by increased inflammatory status. However, recent studies didn’t evaluate the association between central obesity and dietary inflammation index (DII®) that give score to dietary factors according to their inflammatory potential. In the current systematic review and meta-analysis, we summarized the studies that investigated the association between DII® with central obesity indices in the general populations. Methods: In a systematic search from PubMed, SCOPUS, Web of Sciences and Cochrane electronic databases, we collected relevant studies written in English and published until 30 October 2019. The population of included studies were apparently healthy subjects or individuals with obesity or obesity-related diseases. Observational studies that evaluated the association between DII® and indices of central obesity including WC or WHR were included. Results: Totally thirty-two studies were included; thirty studies were cross-sectional and two were cohort studies with 103071 participants. Meta-analysis of observational studies showed that higher DII® scores were associated with 1.81 cm increase in WC (Pooled weighted mean difference (WMD) = 1.813; CI: 0.785–2.841; p = 0.001). Also, a non-significant increase in the odds of having higher WC (OR = 1.162; CI: 0.95–1.43; p = 0.154) in the highest DII category was also observed. In subgroup analysis, the continent, dietary assessment tool and gender were the heterogeneity sources. Conclusion: The findings proposed that adherence to diets with high DII® scores was associated with increased WC. Further studies with interventional designs are necessary to elucidate the causality inference between DII® and central obesity indices.

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