The role of the funnel plot in detecting publication and related biases in meta-analysis

Fear of childbirth and its associated factors among pregnant women in East Africa: Systematic review and meta-analysis

BACKGROUND

Tokophobia is a mild to extreme fear of pregnancy and/or childbirth that may cause a woman to avoid giving birth. It is a common obstetrical problem that affects women's health. Some studies have found that fear of childbirth is common in East African countries. However, there was inconsistency across those studies, and no study was undertaken to report the pooled prevalence of fear of childbirth and its associated factors. As a result, the purpose of this systematic review and meta-analysis is to identify the pooled prevalence of fear of childbirth and its associated factors in Eastern Africa.

METHODS

We conducted a systematic review and meta-analysis of studies on the prevalence and associated factors of childbirth fear using Pub Med, Hinari, Google Scholar, and East African University archives. Data were extracted using a data extraction format developed in Microsoft Excel, and the analysis was carried out with STATA 14 statistical software. Each article's quality was assessed using the Joanna Briggs Institute's critical appraisal tool for prevalence studies. The Cochrane Q statistics and I2 test were used to examine heterogeneity between studies. Subgroup analysis was done by country and sample size. To assess publication bias, a funnel plot, and Egger's regression test were used.

RESULTS

This systematic review and meta-analysis included eleven studies. The pooled prevalence of the fear of childbirth among pregnant women in East Africa was 27.86 %. A history of labor and delivery complications (OR = 5.41, 95 %CI = 2.20, 8.63), poor social support (OR = 4.50, 95 %CI = 1.70, 11.92), primiparity (OR = 1.91, 95 %CI = 1.17, 3.12), no ANC follow-up (AOR=2.65, 95 %CI=1.48, 4.74), and unplanned pregnancy (AOR=4.88, 95 %CI=1.23, 19.31) were statistically associated with the fear of childbirth.

CONCLUSION

The pooled prevalence of fear of childbirth was high. Previous labor and delivery complications, poor social support, primiparity, a lack of antenatal care follow-up, and unplanned pregnancy were all statistically associated with fear of childbirth. To address this, healthcare providers should focus on individualized psychological support for pregnant women who experience tokophobia. Furthermore, encouraging comprehensive antenatal care and strengthening social networks can reduce the fear of childbirth and promote maternal well-being.

A Review of Meta-Analyses in Plastic Surgery: Need for Adequate Assessment of Publication Bias

INTRODUCTION

Publication bias describes a phenomenon in which significant positive results have a higher likelihood of being published compared to negative or nonsignificant results. Publication bias can confound the estimated therapeutic effect in meta-analyses and needs to be adequately assessed in the surgical literature.

METHODS

A review of meta-analyses published in five plastic surgery journals from 2002 to 2022 was conducted. The inclusion criteria for meta-analyses were factors that demonstrated an obligation to assess publication bias, such as interventions with comparable treatment groups and enough power for statistical analysis. Acknowledgment of publication bias risk, quality of bias assessment, methods used in assessment, and individual article factors were analyzed.

RESULTS

318 unique meta-analyses were identified in literature search, and after full-text reviews, 143 met the inclusion criteria for obligation to assess publication bias. 64% of eligible meta-analyses acknowledged the confounding potential of publication bias, and only 46% conducted a formal assessment. Of those who conducted an assessment, 49% used subjective inspection of funnel plots alone, while 47% used any statistical testing in analysis. Overall, only 9/143 (6.3%) assessed publication bias and attempted to correct for its effect. Journals with a higher average impact factor were associated with mention and assessment of publication bias, but more recent publication year and higher number of primary articles analyzed were not.

CONCLUSIONS

This review identified low rates of proper publication bias assessment in meta-analyses published in five major plastic surgery journals. Assessment of publication bias using objective statistical testing is necessary to ensure quality literature within surgical disciplines.

Childhood Maltreatment and Gratitude: A Multilevel, Meta-Analytic Review

During the past decade, research on the association between childhood maltreatment (CM) and gratitude has been accumulating, but there is a lack of systematic, quantitative evaluation of existing literature. The present systematic review aims to fill this gap by conducting a three-level meta-analysis. After a comprehensive search in five English and three Chinese databases, we retrieved 33 effect sizes from 16 studies with a total sample of 13,818 participants. The results showed that CM (aggregated across forms) was negatively and moderately linked to gratitude (r = -.311, 95% CI [-0.382, -0.235], p < .001). Childhood neglect (i.e., physical and emotional neglect) exhibited more substantial effects on gratitude than emotional abuse, while the effects of childhood physical and sexual abuse were insignificant. In addition, the mean effect sizes were larger in studies with younger samples. However, the effect did not vary as functions of CM measurement, methodological rigor, whether the sample included college students only, publication type, or region of the sample. Last, we highlighted the limitations of existing research, proposed agendas for future studies, and discussed practical implications.

Prenatal cannabis use and the risk of attention deficit hyperactivity disorder and autism spectrum disorder in offspring: A systematic review and meta-analysis

BACKGROUND

It is plausible that exposure to cannabis in-utero could be associated with an increased risk of neurodevelopmental disorders such as attention deficit hyperactivity disorder (ADHD) symptoms and autism spectrum disorder (ASD) during childhood and adolescence; however, mixed results have been reported. This study investigated whether there is an association between prenatal cannabis use and ADHD symptoms and ASD in offspring using a systematic review and meta-analysis methodology.

METHODS

A systematic literature search was conducted in PubMed/Medline, Scopus, EMBASE, Web of Science, Psych-Info, and Google Scholar to identify relevant studies. The study protocol has been preregistered in the Prospective Register of Systematic Reviews (PROSPERO) (CRD42022345001), and the Newcastle-Ottawa Quality Assessment Scale (NOS) was used to assess the methodological quality of included studies. An inverse variance weighted random effect meta-analysis was conducted to pool the overall effect estimates from the included studies.

RESULTS

Fourteen primary studies, consisting of ten on ADHD and four on ASD, with a total of 203,783 participants, were included in this study. Our meta-analysis underscores an increased risk of ADHD symptoms and/or disorder [β = 0.39: 95 % CI (0.20-0.58), I2 = 66.85 %, P = 0.001)] and ASD [RR = 1.30: 95 % CI (1.03-1.64), I2 = 45.5 %, P = 0.14] associated with in-utero cannabis exposure in offspring compared to their non-exposed counterparts. Additionally, our stratified analysis highlighted an elevated risk of ADHD symptoms [β = 0.54: 95 % CI (0.26-0.82)] and a marginally significant increase in the risk of diagnostic ADHD among exposed offspring compared to non-exposed counterparts [RR = 1.13, 95 % CI (1.01, 1.26)].

CONCLUSION

This study indicated that maternal prenatal cannabis exposure is associated with a higher risk of ADHD symptoms and ASD in offspring.

The association between prenatal cannabis use and congenital birth defects in offspring: A cumulative meta-analysis

OBJECTIVE

To examine the association between prenatal cannabis use and structural birth defects in exposed offspring.

METHODS

In line with the preregistered protocol (PROSPERO: CRD42022368623), we systematically searched PubMed/Medline, CINHAL, EMBASE, Web of Science, ProQuest, Psych-Info, and Google Scholar for published articles until 25 January 2024. The methodological quality of the included studies was appraised by the Newcastle-Ottawa Quality Assessment Scale (NOS). A meta-analysis was carried out to report the pooled effect estimates from the included studies. We further performed subgroup, leave-one-out sensitivity, and meta-regression analyses, which increased the robustness of our findings.

RESULTS

In this cumulative meta-analysis, thirty-six observational studies, consisting of 18 case-control and 18 cohort studies, with 230, 816 cases of birth defects and 18,049,013 controls (healthy babies) were included in the final analysis. We found that offspring exposed to maternal prenatal cannabis are at greater risks of a wide range of structural birth defects: cardiovascular/heart [OR = 2.35: 95 % CI 1.63 - 3.39], gastrointestinal [OR = 2.42: 95 % CI 1.61 - 3.64], central nervous system [OR = 2.87: 95 % CI 1.51 - 5.46], genitourinary [OR = 2.39: 95 % CI 1.11 - 5.17], and any (unclassified) birth defects [OR = 1.25: 95 % CI 1.12 - 1.41].

CONCLUSION

The findings from the current study suggest that maternal prenatal cannabis exposure is associated with a higher risk of different forms of structural birth defects in offspring. The findings underscore the significance of implementing preventive strategies, including enhanced preconception counselling, to address cannabis use during pregnancy and mitigate the risk of birth defects in offspring.

The Perils of Misinterpreting and Misusing "Publication Bias" in Meta-analyses: An Education Review on Funnel Plot-Based Methods

Publication bias refers to a systematic deviation from the truth in the results of a meta-analysis due to the higher likelihood for published studies to be included in meta-analyses than unpublished studies. Publication bias can lead to misleading recommendations for decision and policy making. In this education review, we introduce, explain, and provide solutions to the pervasive misuses and misinterpretations of publication bias that afflict evidence syntheses in sport and exercise medicine, with a focus on the commonly used funnel-plot based methods. Publication bias is more routinely assessed by visually inspecting funnel plot asymmetry, although it has been consistently deemed unreliable, leading to the development of statistical tests to assess publication bias. However, most statistical tests of publication bias (i) cannot rule out alternative explanations for funnel plot asymmetry (e.g., between-study heterogeneity, choice of metric, chance) and (ii) are grossly underpowered, even when using an arbitrary minimum threshold of ten or more studies. We performed a cross-sectional meta-research investigation of how publication bias was assessed in systematic reviews with meta-analyses published in the top two sport and exercise medicine journals throughout 2021. This analysis highlights that publication bias is frequently misused and misinterpreted, even in top tier journals. Because of conceptual and methodological problems when assessing and interpreting publication bias, preventive strategies (e.g., pre-registration, registered reports, disclosing protocol deviations, and reporting all study findings regardless of direction or magnitude) offer the best and most efficient solution to mitigate the misuse and misinterpretation of publication bias. Because true publication bias is very difficult to determine, we recommend that future publications use the term "risk of publication bias".

Effect of synchronous remote-based interventions on suicidal behaviours: protocol for a systematic review and meta-analysis

INTRODUCTION

Suicide is among the leading causes of preventable death worldwide. The impact of suicide affects the personal, social and economic levels. Therefore, its prevention is a priority for public health systems. Previous studies seem to support the efficacy of providing active contact to people who have made a suicide attempt. The current systematic review and meta-analysis aims to investigate the efficacy of distance suicide prevention strategies implemented through synchronous technology-based interventions.

METHODS AND ANALYSIS

This protocol is designed according to the Preferred Reporting Items for Systematic Review and Meta-Analysis Protocols. The bibliographical searches were conducted in the databases PubMed, PsycINFO, Scopus and Web of Science in April 2022, with no restrictions on the time of publication and limited to publications in English or Spanish. The search strategy was performed using free-text terms and Medical Subject Headings terms: suicide, follow-up, synchronous, remote, telehealth, telephone, hotline, video-conference and text message. Two reviewers will independently conduct study screening, selection process, data extraction and risk of bias assessment. The analysis and synthesis of the results will be both qualitative and quantitative. A narrative synthesis, presented in a comprehensive table, will be performed and meta-analysis will be conducted, as appropriate, if sufficient data are provided.

ETHICS AND DISSEMINATION

The present review and meta-analysis will not require ethical approval, as it will use data collected from previously published primary studies. The findings of this review will be published in peer-reviewed journals and widely disseminated.

PROSPERO REGISTRATION NUMBER

CRD42021275044.

Prevalence of depression among students at Ethiopian universities and associated factors: A systematic review and meta-analysis

BACKGROUND

Depression is the most common cause of disability in the world, which affects 350 million people. University students struggle to cope with stressors that are typical of higher education institutions as well as anxiety related to education. Although evidence indicates that they have a high prevalence of depression, no reviews have been done to determine the prevalence of depression among students at Ethiopian universities comprehensively.

METHODS

Without regard to time constraints, PubMed, Scopus, and EMBASE were investigated. A manual search for an article reference list was also conducted. The Meta XL software was used to extract relevant data, and the Stata-11 meta-prop package was used to analyze it. The Higgs I2 test was used to test for heterogeneity.

RESULTS

A search of the electronic and manual systems resulted in 940 articles. Data were extracted from ten studies included in this review involving a total number of 5207 university students. The pooled prevalence of depression was 28.13% (95% CI: 22.67, 33.59). In the sub-group analysis, the average prevalence was higher in studies having a lower sample size (28.42%) than studies with a higher sample; 27.70%, and studies that utilized other (PHQ-9, HADS); 30.67% higher than studies that used BDI-II; 26.07%. Being female (pooled AOR = 5.56) (95% CI: 1.51, 9.61), being a first-year (pooled AOR = 4.78) (95% CI: 2.21, 7.36), chewing khat (pooled AOR = 2.83) (95% CI: 2.32, 3.33), alcohol use (pooled AOR = 3.12 (95% CI:3.12, 4.01) and family history of mental illness (pooled AOR = 2.57 (95% CI:2.00, 3.15) were factors significantly associated with depression.

CONCLUSION

This systematic review and meta-analysis revealed that more than one-fourth of students at Ethiopian universities had depression. More efforts need to be done to provide better mental healthcare to university students in Ethiopia.

The Prevalence of Anxiety among Men Who Have Sex with Men: A Protocol for A Systematic Review and Meta-Analysis

Anxiety is reported to be common and serious among men who have sex with men (MSM). A growing number of researchers focus on MSM's anxiety and reported their severity, while the estimate results vary substantially between studies. The objective of this study is to evaluate the pooled prevalence of anxiety or anxiety disorders among MSM worldwide. This systematic review and meta-analysis protocol will follow the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA-P) guidelines. Studies will be searched from English and Chinese electronic databases. Observational studies, longitudinal studies, and controlled trials reporting the prevalence of anxiety or anxiety disorders among MSM will be included. Two reviewers will independently screen all the studies and extract data. Quality appraisal will be conducted using the Joanna Briggs Institute's (JBI's) critical appraisal checklist for reporting prevalence data. Meta-analysis will be implemented with a random-effect model which will evaluate pooled prevalence of anxiety with 95% confidence intervals (CI). Subgroup analysis will be conducted among different regions, sampling methods, data collection methods, MSM characteristics, measures used to assess anxiety and its cut-off. This review will contribute to a great understanding of anxiety among MSM worldwide. The findings will help relative policymakers and researchers develop effective measures and interventions for reducing the burden of anxiety morbidity among this population.

Menstrual hygiene practice and associated factors among adolescent girls in sub-Saharan Africa: a systematic review and meta-analysis

BACKGROUND

Menstrual hygiene has not received adequate attention in Sub-Saharan Africa, and there is a lack of regional representative data. Therefore, this study aimed to estimate the pooled prevalence of good menstrual hygiene practices and associated factors among adolescent girls in sub-Saharan Africa.

METHODS

In this study, the Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines were used to develop the review manuscript. Online electronic databases, such as PubMed/Medline, Google Scholar, and CINAHL, were searched to retrieve available studies. The database search was conducted from January 1 to May 17, 2022. The selection, quality assessment, and data extraction of the studies were performed. Quality assessment of the studies was performed using the Joanna Briggs Institute Meta-Analysis of Statistics Assessment and Review Instrument. Subgroup analysis and meta-regression were performed based on country, study area, and sample size. Publication bias was examined by funnel plots and Egger's test. The statistical analysis was conducted using STATA version 14 software and RevMan software, and statistical significance was declared at a p value of less than 0.05.

PROTOCOL REGISTRATION NUMBER

CRD42020165628.

RESULTS

A total of 229 studies were retrieved, and 14 studies were included in the final meta-analysis. The pooled prevalence of good menstrual hygiene practices was 45% (95% CI, (37, 53). Adolescents from urban residences (OR = 3.03, 95% CI (2.3, 3.97)), able to afford menstrual sanitary products (OR = 2.17, 95% CI (1.42, 3.3)), and from educated mothers (OR = 2.33, 95% CI (1.32, 4.12)) were associated with increased odds of good menstrual hygiene practice.

CONCLUSION

The pooled prevalence of menstrual hygiene practices was low compared to the SDG 6.2 target by 2030. "Achieve access to adequate and equitable sanitation and hygiene for all, paying special attention to the needs of women and girls and those in vulnerable situations". Therefore, improving the accessibility of a safe water supply, hygiene, sanitation facilities and affordability of menstrual products and promoting maternal education are mandatory and should be part of government-level public health policy to prevent related health issues, loss of economic output and education opportunities.

Prediction models for depression risk among older adults: systematic review and critical appraisal

OBJECTIVE

To provide an overview of prediction models for the risk of major depressive disorder (MDD) among older adults.

METHODS

We conducted a systematic review combined with a meta-analysis and critical appraisal of published studies on existing geriatric depression risk models.

RESULTS

The systematic search screened 23,378 titles and abstracts; 14 studies including 20 prediction models were included. A total of 16 predictors were selected in the final model at least twice. Age, physical health, and cognitive function were the most common predictors. Only one model was externally validated, two models were presented with a complete equation, and five models examined the calibration. We found substantial heterogeneity in predictor and outcome definitions across models; important methodological information was often missing. All models were rated at high or unclear risk of bias, primarily due to methodological limitations. The pooled C-statistics of 12 prediction models was 0.83 (95%CI=0.77-0.89).

CONCLUSION

The usefulness of all models remains unclear due to several methodological limitations. Future studies should focus on methodological quality and external validation of depression risk prediction models.

Women’s decision-making power regarding family planning use and associated factors in Ethiopia: A systematic review and meta-analysis

Objective:

Although emphasis is placed on women’s decision-making power regarding family planning use in Ethiopia, the utilization of contraceptives is low. There are studies conducted in different parts of the country on women’s decision-making power regarding family planning use; however, there are inconsistent findings. Thus, this study aimed to determine the pooled prevalence of women’s decision-making power regarding family planning use and associated factors in Ethiopia.

Methods:

The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were followed to develop the systematic review and meta-analysis. All observational studies were retrieved from online databases, including PubMed, CINAHL, Google Scholar, African Journal Online and gray literature. The data search was performed from 1 December to 16 May 2022. The quality of the studies was critically assessed using the Joanna Briggs Institute checklist. Heterogeneity among studies was examined using the I2 statistic. RevMan version 5.3 and STATA version 14 software were used for analysis.

Results:

A total of 852 studies were retrieved, and 8 studies were included in the final meta-analysis. The pooled prevalence of women’s decision-making power regarding family planning use was 57 (95% confidence interval: 37, 77). Good knowledge of family planning methods (odds ratio: 2.46, 95% confidence interval: 1.65, 3.67), a positive attitude toward family planning methods (odds ratio: 2.04, 95% confidence interval: 1.3, 3.2), and having primary or higher education (odds ratio: 9.76, 95% confidence interval: 4.36, 21.99) were associated with increased odds of women’s decision-making power regarding family planning use.

Conclusion:

Nearly three in five married women made decisions regarding family planning use in Ethiopia. Women with good knowledge of family planning methods, a positive attitude toward family planning methods, and women having primary or higher education were associated with increased odds of women’s decision-making power regarding family planning use.

Prevalence of mental distress and associated factors among university students in Ethiopia: a meta-analysis

BACKGROUND

Mental distress is an important public health problem and is becoming common health problems among university students.

AIMS

This study aimed to provide a pooled prevalence of mental distress and associated factors among university students in Ethiopia.

METHOD

We systematically searched PubMed, EMBASE and PsycINFO databases. A further search was performed at Google Scholar search engine for additional studies. All observational studies reporting the prevalence of mental distress and/or associated factors among university students in Ethiopia were included. Pooled prevalence with 95% confidence interval (95% CI) were calculated using random effects and quality effects models. Subgroup and sensitivity analyses were performed. Heterogeneity between studies and evidence of publication bias were assessed.

RESULTS

The pooled prevalence of mental distress was 35% (95% CI; 28%-43%). Being female, participating in religious programmes, having close friends, experiencing financial distress, alcohol use, khat use, conflict with friends, lack of interest in their field of study and a family history of mental illness were factors associated with mental distress among students. We found significant heterogeneity, but no evidence of publication bias.

CONCLUSIONS

More than one third of university students in Ethiopia have suffered with mental distress. The finding provides evidence that university students are at risk population for mental health problems and suggests the need for early intervention to prevent severe mental illness.

Yield and quality of alfalfa (Medicago sativa L.) in response to fertilizer application in China: A meta-analysis

INTRODUCTION

In China, alfalfa (Medicago sativa L.) often grows in marginal land with poor soil fertility and suboptimal climate conditions. Alfalfa production cannot meet demands both in yield and quality. It is necessary to apply fertilizers to achieve high yields and produce high-quality alfalfa in China. However, there is no understanding on the impact of fertilizer application on alfalfa production and the possible optimal application rates across China.

METHODS

We conducted a meta-analysis to explore the contribution of fertilizer application to the yield and quality of alfalfa based on a dataset from 86 studies published between 2004 and 2022.

RESULTS AND DISCUSSION

The results showed that fertilizer application not only increased alfalfa yield by 19.2% but also improved alfalfa quality by increasing crude protein (CP) by 7.7% and decreasing acid detergent fibre by 2.9% and neutral detergent fibre by 1.8% overall compared to the non-fertilizer control levels. The combined nitrogen (N), phosphorus (P) and potassium (K) and combined NP fertilizer applications achieved the greatest yield and CP concentration increases of 27.0% and 13.5%, respectively. Considering both yield and quality, the optimal rate of fertilizer application ranged from 30 to 60 kg ha^-1 for N, 120 to 150 kg ha^-1 for P and less than 120 kg ha^-1 for K. Meta-analysis further showed that the effect of fertilizer application on yield was greater in low soil organic matter (SOM) soils than in high SOM soils. In conclusion, fertilizer application is an effective strategy to improve the yield and quality of alfalfa in China, especially that grown in low SOM soils. This study is helpful for optimizing fertilization schedules of alfalfa in China.

Women's decisions regarding family planning use and its determinants in Ethiopia: A systematic review and meta-analysis protocol

BACKGROUND

Low use of contraceptives has many consequences. Despite this effect, less emphasis is given to women's decision-making on family planning use in Ethiopia. Although there are studies conducted in different parts of the country on women's decision-making regarding family planning use, there are inconsistent findings and a lack of national representative data. Thus, this systematic review and meta-analysis aimed to determine the pooled prevalence of women's decision-making regarding family planning use and its determinants in Ethiopia.

METHODS

Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines will be followed to develop the review protocol. All observational studies will be retrieved using Medical Subject Heading (MeSH) terms or keywords from the online databases PubMed, CINAHL, Google Scholar, African Journal online, and gray literature. The quality of the studies will be critically assessed using the Joanna Briggs Institute checklist. Heterogeneity among studies will be examined using I-squared statistics. Funnel plots and Egger's test will be used to examine publication bias. The meta-analysis will be performed using STATA version 14 software. Statistical significance will be determined at 95% CI.

DISCUSSION

Improving women's autonomy in decision-making on reproductive health services, including contraceptive use, has a substantial advantage. There are studies on women's decision-making in family planning use; however, there are inconsistent findings. Therefore, this review protocol aims to determine the pooled prevalence of women's decision-making regarding family planning use and its determinants in Ethiopia. The findings from this systematic review and meta-analysis will help inform policy makers to develop appropriate interventions to improve women's decision making regarding family planning use.

The Efficiency of Commercial Immunodiagnostic Assays for the Field Detection of Schistosoma japonicum Human Infections: A Meta-Analysis

Although great strides have been achieved, schistosomiasis japonica remains a major public health concern in China. Immunodiagnostics have been widely accepted as the first choice in large-scale screening of Schistosoma japonicum human infections, and indirect hemagglutination test (IHA), enzyme-linked immunosorbent assay (ELISA), and dipstick dye immunoassay (DDIA) are currently the three most common immunological tests for the diagnosis of S. japonicum human infections in China. This meta-analysis aimed to comprehensively assess the performance of IHA, ELISA, and DDIA for the field diagnosis of S. japonicum human infections. A total of 37 eligible publications were enrolled in the final analysis, including 29 Chinese publications and 8 English publications. No significant heterogeneities were detected among the studies reporting ELISA (I2 = 88%, p < 0.05), IHA (I2 = 95%, p < 0.05), or DDIA (I2 = 84%, p < 0.05). DDIA showed the highest pooled sensitivity (90.8%, 95% CI: 84.6% to 94.7%) and IHA presented the highest pooled specificity for detection of S. japonicum human infections (71.6%, 95% CI: 65.9% to 76.7%). Summary receiver operating characteristic (SROC) curve analysis showed that IHA exhibited the highest area under the SROC curve (AUC) (0.88, 95% CI: 0.85 to 0.9), and ELISA presented the lowest AUC (0.85, 95% CI: 0.82 to 0.88). Deeks’ funnel plots indicated no publication bias. IHA presented the highest sensitivity in medium-endemicity regions and the highest specificity for diagnosis of S. japonicum human infections in low-endemicity regions, and ELISA showed the highest diagnostic sensitivity in high-endemicity regions and the highest specificity in medium-endemicity regions, while DDIA exhibited the highest diagnostic sensitivity in high-endemicity regions and the highest specificity in low-endemicity regions. IHA and DDIA presented a higher efficiency for the diagnosis of S. japonicum human infections in marshland and lake regions than in hilly and mountainous regions, while ELISA showed a comparable diagnostic sensitivity between in marshland and lake regions and hilly and mountainous regions (88.3% vs. 88.6%), and a higher specificity in marshland and lake regions than in hilly and mountainous regions (60% vs. 48%). Our meta-analysis demonstrates a comparable diagnostic accuracy of IHA, ELISA, and DDIA for S. japonicum human infections, and the diagnostic sensitivity and specificity of IHA, ELISA, and DDIA vary in types and infection prevalence of endemic regions. DDIA combined with IHA is recommended as a tool for screening chemotherapy targets and seroepidemiological surveys during the stage moving towards schistosomiasis elimination in China. Further studies to examine the effectiveness of combinations of two or three immunological tests for diagnosis of S. japonicum human infections are warranted.

Practice Level and Associated Factors Towards the Preventive Measures of COVID-19 Among the General Population; A Systematic Review and Meta-Analysis

Background

Studies conducted on the practice of COVID-19 preventive methods across the world are highly inconsistent and inconclusive. Hence, this study intended to estimate the pooled preventive practice and its determinants among the general population.

Methods

This study was conducted using online databases (PubMed, HINARI, Scopus, EMBASE, Science Direct, and Cochrane library database), African Journals online, Google Scholar, open gray and online repository accessed studies. The quality of the included studies was assessed using Newcastle-Ottawa Quality Assessment Scale (NOS). STATA 14.0 software for analysis. The existence of heterogeneity between studies was checked using Cochran Q test and I2 test statistics and then, the presence of publication bias was detected using both funnel plot and Egger's test.

Results

51 studies were included and the pooled level of practice toward the preventive measures of COVID-19 was 74.4% (95% CI: 70.2-78.6%, I2 = 99.7%, P < 0.001] using a random effects model. Being female [OR = 1.97: 95% CI 1.75, 2.23; I2 = 0.0%, P < 0.698], rural residence [OR = 0.53: 95% CI 0.44, 0.65; I2 = 73.5%, P < 0.013], attending higher education level [OR = 1.47: 95% CI 1.18, 1.83; I2 = 75.4%, P < 0.001], being employed [OR = 2.12: 95% CI 1.44, 3.12; I2 = 91.8%, P < 0.001], age < 30 [OR = 0.73: 95% CI 0.60, 0.89; I2 = 73.9%, P < 0.001], and knowledgeable [OR = 1.22: 95% CI 1.09, 1.36; I2 = 47.3%, P < 0.077] were the independent predictors of adequate practice level.

Conclusions

nearly three-fourths of the general population has an adequate preventive practice level toward COVID-19. Thus, the global, regional, national, and local governments need to establish policies and strategies to address the identified factors.

Comparison of Diagnostic Test Accuracy of Cone-Beam Breast Computed Tomography and Digital Breast Tomosynthesis for Breast Cancer: A Systematic Review and Meta-Analysis Approach

BACKGROUND

Cone-beam breast computed tomography (CBBCT) and digital breast tomosynthesis (DBT) remain the main 3D modalities for X-ray breast imaging. This study aimed to systematically evaluate and meta-analyze the comparison of diagnostic accuracy of CBBCT and DBT to characterize breast cancers.

METHODS

Two independent reviewers identified screening on diagnostic studies from 1 January 2015 to 30 December 2021, with at least reported sensitivity and specificity for both CBBCT and DBT. A univariate pooled meta-analysis was performed using the random-effects model to estimate the sensitivity and specificity while other diagnostic parameters like the area under the ROC curve (AUC), positive likelihood ratio (LR+), and negative likelihood ratio (LR-) were estimated using the bivariate model.

RESULTS

The pooled sensitivity specificity, LR+ and LR- and AUC at 95% confidence interval are 86.7% (80.3-91.2), 87.0% (79.9-91.8), 6.28 (4.40-8.96), 0.17 (0.12-0.25) and 0.925 for the 17 included studies in DBT arm, respectively, while, 83.7% (54.6-95.7), 71.3% (47.5-87.2), 2.71 (1.39-5.29), 0.20 (0.04-1.05), and 0.831 are the pooled sensitivity specificity, LR+ and LR- and AUC for the five studies in the CBBCT arm, respectively.

CONCLUSIONS

Our study demonstrates that DBT shows improved diagnostic performance over CBBCT regarding all estimated diagnostic parameters; with the statistical improvement in the AUC of DBT over CBBCT. The CBBCT might be a useful modality for breast cancer detection, thus we recommend more prospective studies on CBBCT application.

Determinants of birth asphyxia among preterm newborns in Ethiopia: a systematic review and meta-analysis of observational studies protocol

BACKGROUND

Birth asphyxia accounted for nearly 50% 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. Moreover, studies conducted in Ethiopia were highly variable and inconclusive to estimate the pooled prevalence and determinants of perinatal birth asphyxia among preterm babies.

OBJECTIVE

This study aimed to estimate the pooled prevalence of birth asphyxia and its determinants among preterm 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 and infant care databases uploaded at Ethiopian Health Development Journal and Ethiopian Journal of Health Sciences will be searched until 30 June 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. 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.

Preventive practices toward sexually transmitted infections and their determinants among young people in Ethiopia: A protocol for systematic review and meta-analysis

BACKGROUND

Globally, the estimated annual number of new cases of curable sexually transmitted infections occurring among young people aged 15-24 years is approximately 178.5 million. There are fragmented and inconsistent findings on preventive practices for sexually transmitted infections. Thus, this systematic review and meta-analysis protocol aimed to estimate the pooled prevalence of preventive practices of sexually transmitted infections and identify its determinants among young people in Ethiopia.

METHODS

The Preferred Reporting Items for Systematic Review and Meta-analyses (PRISMA) will be used to develop the review protocol. Online databases such as PubMed, CINAHL, Scopus, Google, and Google Scholar will be used to search published and unpublished studies. The Joanna Briggs Institute Meta-Analysis of Statistics Assessment and Review Instrument will be used to assess the quality of the study. Statistical heterogeneity will be checked using the Cochran Q test and I2 statistics. Subgroup analysis and meta-regression will be performed to identify the sources of heterogeneity. The statistical analysis will be performed using STATA version 14 software. A random-effects model will be performed to estimate the pooled prevalence and identify determinants of preventive practices of sexually transmitted infections.

DISCUSSION

Young people have a high unmet need for sexual and reproductive health services and poor preventive practices toward sexually transmitted infections. Although there are studies on preventive practices for sexually transmitted infections, there is no study finding on the pooled prevalence of preventive practices for sexually transmitted infections and its determinants among young people in Ethiopia. Thus, this systematic review and meta-analysis protocol will help to develop appropriate strategies.

Male involvement in family planning use and its determinants in Ethiopia: a systematic review and meta-analysis protocol

BACKGROUND

The need to include males who require joint spousal decisions is critical in achieving key reproductive health indicators. Low involvement of males in family planning use is one of the contributing factors for low contraceptive use in Ethiopia. Despite this, there are inconsistent findings on the prevalence and determinants of male involvement in family planning use in Ethiopia. Thus, this systematic review and meta-analysis aimed to determine the pooled prevalence of male involvement in family planning use and its determinants in Ethiopia.

METHODS

The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines will be used to develop the protocol. The online databases PubMed, CINAHL, Google Scholar, and unpublished gray literature will be searched to retrieve available articles from April 10 to August 11, 2021. The two authors will conduct selection of studies, data extraction, and quality assessment. The quality of the studies will be assessed using the Joanna Briggs Institute checklist. The chi-squared test and I-squared statistic will be used to examine heterogeneity among studies. Sources of heterogeneity will be investigated using subgroup analysis and meta-regression based on regions and residence (urban and rural). Publication bias will be examined by observation using funnel plots and statistically by Begg's and Egger's tests. A random-effects model will be used to estimate the pooled prevalence and its determinants of male involvement in family planning use.

DISCUSSION

The role of males in family planning and participation in contraceptive use improves women's uptake and continuity of family planning use. Although there are studies on male involvement in family planning use, there are no synthesis research findings on the pooled prevalence of male involvement in family planning use and its determinants in Ethiopia. Therefore, the findings from this systematic review and meta-analysis will help the national health sector transformational plane emphasize the pooled prevalence and its determinants that drive low male involvement in family planning use in Ethiopia.

Association of myocardial fibrosis detected by late gadolinium-enhanced MRI with clinical outcomes in patients with diabetes: a systematic review and meta-analysis

OBJECTIVE

This meta-analysis assessed the associations of myocardial fibrosis detected by late gadolinium-enhanced (LGE)-MRI with the risk of major adverse cardiac and cerebrovascular events (MACCEs) and major adverse cardiac events (MACEs) in patients with diabetes.

DESIGN

Systematic review and meta-analysis reported in accordance with the guidelines of the Meta-analysis of Observational Studies in Epidemiology statement.

DATA SOURCES

We searched the Medline, Embase and Cochrane by Ovid databases for studies published up to 27 August 2021.

ELIGIBILITY CRITERIA

Prospective or respective cohort studies were included if they reported the HR and 95% CIs for MACCEs/MACEs in patients with either type 1 or 2 diabetes and LGE-MRI-detected myocardial fibrosis compared with patients without LGE-MRI-detected myocardial fibrosis and if the articles were published in the English language.

DATA EXTRACTION AND SYNTHESIS

Two review authors independently extracted data and assessed the quality of the included studies. Pooled HRs and 95% CIs were analysed using a random effects model. Heterogeneity was assessed using forest plots and I² statistics.

RESULTS

Eight studies with 1121 patients with type 1 or type 2 diabetes were included in this meta-analysis, and the follow-up ranged from 17 to 70 months. The presence of myocardial fibrosis detected by LGE-MRI was associated with an increased risk for MACCEs (HR: 2.58; 95% CI 1.42 to 4.71; p=0.002) and MACEs (HR: 5.28; 95% CI 3.20 to 8.70; p<0.001) in patients with diabetes. Subgroup analysis revealed that ischaemic fibrosis detected by LGE was associated with MACCEs (HR 3.80, 95% CI 2.38 to 6.07; p<0.001) in patients with diabetes.

CONCLUSIONS

This study demonstrated that ischaemic myocardial fibrosis detected by LGE-MRI was associated with an increased risk of MACCEs/MACEs in patients with diabetes and may be an imaging biomarker for risk stratification. Whether LGE-MRI provides incremental prognostic information with respect to MACCEs/MACEs over risk stratification by conventional cardiovascular risk factors requires further study.

Worldwide Occurrence of HIV-Associated Neurocognitive Disorders and Its Associated Factors: A Systematic Review and Meta-Analysis

BACKGROUND

HIV-associated neurocognitive disorders are common in people living with HIV/AIDS and affect the adherence of patients to prescriptions, activities of daily living, and quality of life of patients. However, there is a lack of summative evidence in the area. The present meta-analysis was therefore addressing this gap.

METHODS

We did our electronic search in Psych-Info, EMBASE, Scopus, and PubMed. The retrieved articles were stored with the endnote reference manager and data was extracted using Meta-XL version 5.3. The quality of studies was evaluated with the modified Newcastle-Ottawa Scale (NOS). A random-effect model and STATA-16 were used to compute the average estimate of HAND. Heterogeneity was weighed with I² statistics. A sensitivity analysis and subgroup analysis were employed. The existence/nonexistence of a publication bias was checked with the Eggers test of publication bias.

RESULTS

The average prevalence of HAND was 50.41% (95% CI: 45.56, 55.26). The average estimate of HAND in Europe was found to be 50.015% whereas in Africa, Asia, and the United States of America (USA) it was 49.566, 52.032, and 50.407% respectively. The prevalence of HAND in studies that used the HIV Dementia Scale (IHDS) was 36.883% and 59.956% at cutoff points of IHDS <9.5 and IHDS <10 respectively. Besides, the estimated average of HAND with the global dementia scale (GDS) was 40.766%. The prevalence of HAND in cross-sectional, cohort, and case-control studies was 49.52, 54.087, and 44.45% in that order. Socio-demographic variables; low level of education and older age, clinical and HIV related variables; the advanced stage of the illness and CD4 count of 500 cells/dl or less and psychological variables such as comorbidity of depression increases the risk of HAND.

CONCLUSION

The prevalence of HIV-associated neurocognitive disorders was about 50.41%. Low level of education and older age, clinical and HIV related variables such as the advanced stage of the illness and CD4 count of 500 cells/dl or less, and comorbidity of depression were associated with HIV associated neurocognitive disorders. Public health interventions for HIV patients should target these essential problems.

Prevalence of anxiety, depression, and psychological distress among the general population during the COVID-19 pandemic: A systematic review and meta-analysis

BACKGROUND

The COVID-19 pandemic is a worldwide epidemic declared by the world health organization as a public health emergency of concern and consequently inducing huge mental health and psychological reactions.

AIMS

This study is aimed to summarize the existing data regarding anxiety, depression, and psychological distress during the covid-19 pandemic among the wider population so that effective intervention strategies will be initiated.

METHODS

Pieces of literature that assessed anxiety, depression, and psychological distress among the general population during the COVID pandemic period were systematically gathered. Data extraction in Microsoft excel was done by two independent reviewers using predefined criteria. The analysis was done using a stata-11 and random effect model. A sub-group and sensitivity analysis was done. Besides, the funnel plot and eggers publication bias test was tested.

RESULTS

Sixteen studies that assessed 78,225 participants were included. Nine studies were included in the meta-analysis for anxiety prevalence. The average prevalence of anxiety was found to be 38.12%. A sub-group analysis showed that anxiety was 33.33% in China and 47.70% in other countries (Italy, Turkey, and India). Anxiety prevalence in studies measured with the DASS-21 scale, GAD-7 scale, and other tools (SAS, HADS, and 5-point Likert scale) was 23.4%, 40.73%, and 44.47% respectively. The prevalence of anxiety in studies that assessed a sample size above 2,000 participants was 40.33%. The average prevalence of depression among included studies was 34.31% and a sub-group analysis showed that depression was higher in China (36.32%) than in other countries (28.3%). Moreover, six studies reported psychological distress and the average prevalence was 37.54%.

CONCLUSION

This study revealed that anxiety, depression, and psychological distress are potential public mental health problems of the global community that suggests the need for early recognition and initiation of interventions during the COVID-19 pandemic period.

Diagnostic Test Accuracy of Deep Learning Detection of COVID-19: A Systematic Review and Meta-Analysis

RATIONALE AND OBJECTIVE

To perform a meta-analysis to compare the diagnostic test accuracy (DTA) of deep learning (DL) in detecting coronavirus disease 2019 (COVID-19), and to investigate how network architecture and type of datasets affect DL performance.

MATERIALS AND METHODS

We searched PubMed, Web of Science and Inspec from January 1, 2020, to December 3, 2020, for retrospective and prospective studies on deep learning detection with at least reported sensitivity and specificity. Pooled DTA was obtained using random-effect models. Sub-group analysis between studies was also carried out for data source and network architectures.

RESULTS

The pooled sensitivity and specificity were 91% (95% confidence interval [CI]: 88%, 93%; I2 = 69%) and 92% (95% CI: 88%, 94%; I2 = 88%), respectively for 19 studies. The pooled AUC and diagnostic odds ratio (DOR) were 0.95 (95% CI: 0.88, 0.92) and 112.5 (95% CI: 57.7, 219.3; I2 = 90%) respectively. The overall accuracy, recall, F1-score, LR+ and LR- are 89.5%, 89.5%, 89.7%, 23.13 and 0.13. Sub-group analysis shows that the sensitivity and DOR significantly vary with the type of network architectures and sources of data with low heterogeneity are (I2 = 0%) and (I2 = 18%) for ResNet architecture and single-source datasets, respectively.

CONCLUSION

The diagnosis of COVID-19 via deep learning has achieved incredible performance, and the source of datasets, as well as network architectures, strongly affect DL performance.

Psychiatric Disorders in Adolescents Living with HIV and Association with Antiretroviral Therapy Adherence in Sub-Saharan Africa: A Systematic Review and Meta-analysis

In sub-Saharan Africa (SSA), a systematic approach to exploring the prevalence of psychiatric disorders (PDs) and adherence to antiretroviral treatment (ART) in adolescents living with HIV (ALWHIV) is lacking. This study aimed to systematically review the studies conducted in SSA on the prevalence of PDs among ALWHIV and their association with ART adherence. A systematic search of all English studies assessing PDs among ALWHIV using the Web of Science, PubMed, and EBSCO databases was conducted between March 1 and September 30, 2019. Forty-two studies published between 2009 to 2019 met the inclusion criteria, of which 15 were included in the meta-analysis. The most common PDs were depression (0.24, 95% CI 0.14-0.36) and anxiety disorder (0.26, 95% CI 2-0.44). The available evidence could not conclude on the definitive association between PDs and ART adherence; therefore, further research is required. However, the need for mental health integration in the care for ALWHIV is evident.

Prevalence of suicidal ideation and attempted suicide in the general population of Ethiopia: a systematic review and meta-analysis

Background

In Ethiopia, in spite of the high burden of suicide related-adverse effect, substantial variability in the reported prevalence of individual studies about suicidal ideation and attempted suicide; there is no national level epidemiological evidence. Thus, the present study aimed to determine the pooled prevalence of suicide ideation and suicidal attempt in the general population.

Methods

We followed the PRISMA Guidelines to report the results of the finding. Databases including: PubMed/Medline, SCOPUS, CINAHL (EBSCOhost), African Journal Online (AJOL) and African Indexed Medicus (AIM) were searched. Heterogeneity was assessed by Cochrane chi-square (χ²) and quantified by I² statistics test. Sensitivity test and subgroup analysis performed. Publication bias was tested by funnel plots and Egger’s test. Effect size was calculated by random effects model.

Results

A total of 12 studies for suicidal ideation and 10 studies for attempted suicide were included in the study. The prevalence of suicidal ideation and attempted suicide were ranged from 1 to 55% and 0.6% to 14% respectively. The 12-month pooled prevalence of suicidal ideation and suicidal attempt were 9% (5–16%), I² = 99.64%, p < 0.001 and 4% (1–8%), I² = 98.11%, p < 0.001] respectively. The lifetime pooled prevalence of attempted suicide was found to be 4% (3–6%). We found evidence of significant heterogeneity for suicidal ideation [I² = 99.64%, p < 0.001] and attempted suicide [I² = 98.11%, p < 0.001]. The subgroup analysis could not identified source of heterogeneity. The sensitivity analysis showed that none of the point estimates was outside of the overall 95%CI for suicidal ideation and attempted suicide. No evidence of publication bias from the visual inspection of the funnel plot for suicidal ideation and [Egger’s test (P = 0.174)] and attempted suicide [Egger’s test (P = 0.318)].

Conclusion

High prevalence of suicidal ideation and attempted suicide were observed in the general population of Ethiopia. These suggest the need of strengthening the awareness of suicidal behaviours and evaluate the effectiveness of the national health strategy in addressing the issues of suicidal behaviours.

A systematic review and meta-analysis protocol on stunting and its determinants among school-age children (6-14years) in Ethiopia

BACKGROUND

In Ethiopia, stunting is a common public health problem among school-age children. Even though several studies were conducted in different parts of the country, the national pooled prevalence of stunting and its determinants not estimated. Therefore, this study intends to determine the pooled prevalence and determinants of stunting among school-age children in Ethiopia.

METHODS

This review protocol is registered at PROSPERO with Registration number: CRD42020160625. Online databases (Medline, PubMed, Scopus, and Science direct), Google, Google Scholar, and other grey literature will be used to search articles until June 2020. The quality assessment will be performed using the Joanna Briggs Institute checklist. The analysis will be organized and presented according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis. The presence of heterogeneity among studies will be examined using a chi-squared test on Cochran's Q statistic with a 5% level of statistical significance, subgroup analyses, and meta-regression will be performed to investigate sources of heterogeneity. To identify influential studies, sensitivity analysis will be conducted. Presence publication bias will be examined by observing funnel plots. The presence of a statistical association will be declared at a p-value <0.05 with the 95% CI.

DISCUSSION

Stunting is a major public health problem in Ethiopia, which affects the health of children. So, designing and implementing different nutritional strategies and promoting healthcare services is extremely mandatory to overcome stunting problems in the country. To understand this, estimating the prevalence of stunting at the national level and determining the pertinent common determinants using high-level evidence is fairly imperative. Therefore, this study will offer a summarizing finding.

Suicidal ideation, attempt, and its associated factors among HIV/AIDS patients in Africa: a systematic review and meta-analysis study

BACKGROUND

Suicidal ideation and suicidal attempt are warning signs for and determine the prognosis of completed suicide. These suicidal behaviors are much more pronounced in people living with HIV/AIDS. Despite this, there is a scarcity of aggregate evidence in Africa. This study was therefore aimed to fill this gap.

METHODS

we extensively searched Psych-info, PubMed, Scopus, and EMBASE to obtain eligible studies. Further screening for a reference list of articles was also done. Meta XL package was used to extract data and the Stata-11 was also employed. Cochran's Q- and the Higgs I² test were engaged to check heterogeneity. Sensitivity and subgroup analysis were implemented. Egger's test and funnel plots were used in detecting publication bias.

RESULTS

The pooled prevalence of suicidal ideation was 21.7% (95% CI 16.80, 26.63). The pooled prevalence of suicidal ideation in Ethiopia, Nigeria, Uganda, and South Africa was 22.7%, 25.3%, 9.8%, and 18.05% respectively. The pooled prevalence of suicidal ideation was larger; 27.7% in studies that used Composite International Diagnostic Interview (CIDI) than Mini-international Neuropsychiatric Interview (MINI); 16.96%. Moreover, the prevalence of suicidal ideation in studies with a sample size of < 400 was 23.42% whereas it was 18.3% in studies with a sample size ≥ of 400 participants. The pooled prevalence of suicidal attempts in this study was 11.06% (95% CI 6.21, 15.92). A suicidal attempt was higher in Ethiopia (16.97%) and Nigeria (16.20%) than Uganda (3.51%). This pooled prevalence of suicidal attempt was higher among studies that used a smaller sample (< 400 participants) (15.5%) than studies that used a larger sample size (≥ 400 participants) (8.4%). The pooled prevalence of suicidal attempt was 3.75%, and 16.97% in studies that used MINI and CIDI respectively. Our narrative synthesis revealed that advanced stages of AIDS, co-morbid depression, perceived HIV stigma, and poor social support was among the factors strongly associated with suicidal ideation and attempt.

CONCLUSION

The pooled magnitude of suicidal ideation and attempt was high and factors like advanced stages of AIDS, co-morbid depression, perceived stigma, and poor social support were related to it. Clinicians should be geared towards this mental health problem of HIV patients during management.

Depressive symptoms and their determinants in patients who are on antiretroviral therapy in the case of a low-income country, Ethiopia: a systematic review and meta-analysis

Background

The presence of depression in people living with HIV/AIDS could lead to non-adherence to antiretroviral medications. It also leads to further comorbid and opportunistic illness and then lowering the patient's quality of life. The objective of this study was therefore to determine the pooled prevalence of depression and its related factors in HIV patients.

Methods

Relevant articles in PubMed, Scopus, and EMBASE were investigated. The Meta-XL version 5.3 was used to extract data and STATA-11 Meta-prop packages with the Random effect model was used to quantify depression and its related factors. Sensitivity and subgroup analysis were performed to explore sources of heterogeneity. The Cochran’s Q-statistic and the Higgs I² test were also done. Besides, the Eggers test and symmetry in the funnel plot were used to detect the presence/absence of publication bias.

Result

In this meta-analysis, we included 21 articles that assessed 10,090 participants. The average prevalence of depression among people with HIV/AIDS was 35.8% (95% CI 28.29, 43.25). The average estimated prevalence of depressive symptoms was 59.4% in the Oromia region and 29.25% in southern Ethiopia. Besides, the average prevalence of depression was 45.6% and 26.2% as measured with Beck’s depression inventory and Hospital anxiety and depression scale respectively. Moreover, the prevalence of depression was 47.7% in studies that used a sample size ≤ of 400 participants and 28.5% in studies that used a sample size of > 400 participants. The pooled adjusted odds ratio (AOR) of perceived HIV stigma was 3.75 (95% CI 2.34, 5.16) and that of poor social support was 6.22 (95% CI 2.96, 9.47). Moreover, the average odds ratio of poor medication adherence, opportunistic infection, and advanced stages of AIDS were 3.03 (95% CI 1.00, 5.05), 5.5 (95% CI 1.97, 10.03), and 5.43 (95% CI 1.60, 9.28) respectively.

Conclusion

The pooled prevalence of depression among individuals living with HIV/AIDS was high. Factors such as perceived HIV stigma, poor social support, opportunistic infection, advanced AIDS stage, and poor medication adherence were related to it. Routine screening and management of depression and its related factors should be given due consideration.

Prevalence and associated factors for alcohol use disorder among tuberculosis patients: a systematic review and meta-analysis study

BACKGROUND

Alcohol use disorders (AUD) in tuberculosis patients are complicated with poor compliance to anti-tuberculosis treatment and poor tuberculosis treatment outcomes. However, aggregate data concerning this problem is not available. Therefore, this review aimed to fill the above gap by generating an average prevalence of AUD in tuberculosis patients.

METHOD

Our electronic search for original articles was conducted in the databases of Scopus, PubMed, and EMBASE, African Index Medicus, and psych-info. Besides, the reference list of selected articles was looked at manually to have further eligible articles for the prevalence and associated factors of AUD in tuberculosis patients. The random-effects model was employed during the analysis. MS-Excel was used to extract data and stata-11 to determine the average prevalence of AUD among tuberculosis patients. A sub-group analysis and sensitivity analysis were also run. A visual inspection of the funnel plots and an Eggers publication bias plot test were checked for the presence of publication bias.

RESULT

A search of the electronic and manual system resulted in 1970 articles. After removing duplicates and unoriginal articles, only 28 articles that studied 30,854 tuberculosis patients met the inclusion criteria. The average estimated prevalence of AUD in tuberculosis patients was 30% (95% CI: 24.00, 35.00). This was with a slight heterogeneity (I2 = 57%, p-value < 0.001). The prevalence of AUD in tuberculosis patients was higher in Asia and Europe; 37% than the prevalence in the US and Africa; 24%. Besides, the average prevalence of AUD was 39, 30, 30, and 20% in studies with case-control, cohort, cross-sectional and experimental in design respectively. Also, the prevalence of AUD was higher in studies with the assessment tool not reported (36%) than studies assessed with AUDIT. AUD was also relatively higher in studies with a mean age of ≥40 years (42%) than studies with a mean age < 40 years (24%) and mean age not reported (27%). Based on a qualitative review; the male gender, older age, being single, unemployment, low level of education and income from socio-demographic variables, retreatment and treatment failure patients, stigma, and medication non-adherence from clinical variables were among the associated factors for AUD.

CONCLUSION

This review obtained a high average prevalence of AUD in tuberculosis patients and this varies across continents, design of studies, mean age of the participants, and assessment tool used. This implied the need for early screening and management of AUD in tuberculosis patients.

Breast self-examination practice and associated factors among female healthcare workers in Ethiopia: A systematic review and meta-analysis

Background

Breast cancer is common global public health problem. It is the principal cause of cancer related death. In Ethiopia, study findings regarding prevalence and associated factors of BSE among female healthcare workers have been inconsistently reported and highly variable. Thus, this systematic review and meta-analysis aimed to determine the pooled prevalence of breast self-examination practice and determinants in Ethiopia.

Methods

A systematic search of PubMed, Medline, EMBASE, Global Health, Google Scholar, CINAHL and Scopus from April 2, 2020 to April 24, 2020. Data were extracted from articles included in the review using a data extraction tool which was adapted from the Joanna Briggs Institute. the quality of each included article was evaluated using the Newcastle-Ottawa scale. Data analysis was done using STATA 11. The Cochrane Q and I² test were used to assess heterogeneity between the studies; and publication bias was assessed using funnel plots and Egger’s test. A random effects meta-analysis was computed to determine the pooled prevalence of breast self-examination. The determinants for breast self-examination were examined. Forest plots were used to present the prevalence and odds ratio with 95% confidence interval.

Results

After reviewing 9605 studies, 12 studies involving 4129 female healthcare workers were included for this review and meta-analysis. The pooled prevalence of breast self-examination practice among healthcare workers in Ethiopia was 56.31% (95% CI: 44.37, 68.25). The subgroup analysis further revealed that the higher breast self-examination practice was observed among other healthcare workers, 58.60% (95% CI: 43.31, 73.90). Good knowledge (AOR = 3.02; 95% CI: 1.24, 7.35), positive attitude (AOR = 2.73; 95% CI: 1.95, 4.13) and family history of breast cancer (AOR = 3.21; 95% CI: 1.22, 6.52) were significantly associated with breast self-examination practice among healthcare workers.

Conclusion

This meta-analysis found that nearly half of the female healthcare workers were not performed breast self-examination. The finding of this study suggests the need of strengthening early diagnosis of breast cancer and control strategies with a collaborative effort of policymakers and other concerned stakeholders.

The prevalence and factors associated with alcohol use disorder among people living with HIV/AIDS in Africa: a systematic review and meta-analysis

Background

Alcohol use disorder (AUD) in HIV/AIDS patient’s decreases adherence and effectiveness of medications and help-seeking to HIV/AIDS care and treatment. This study, therefore, assessed the average 1 year prevalence and associated factors of alcohol use disorder in HIV/AIDS patients.

Methods

We did an electronic data search on PubMed, Scopus, EMBASE, Psych-INFO libraries, African index Medicus and African Journals Online (AJOL). Google scholar was also investigated for non-published articles. The reference lists of published articles were also reviewed. The stata-11meta-prop package was employed. Subgroup and sensitivity analyses were done. Cochran’s Q-statistics and the Higgs I² test were used to check heterogeneity. Publication bias was evaluated with Egger’s test and funnel plots.

Results

Of 1362 articles identified using the search strategies; only 22 studies were included in the final analysis. The average 1 year prevalence of AUD was 22.03% (95% CI: 17.18, 28.67). The average prevalence of AUD in South Africa (28.77%) was higher than in Uganda (16.61%) and Nigeria (22.8%). The prevalence of AUD in studies published before 2011, 2011–2015, and after 2015 was found to be 13.47, 24.93, and 22.88% respectively. The average prevalence of AUD among studies with a sample size > 450 was 16.71% whereas it was 26.46% among studies with a sample size < 450. Furthermore, the average prevalence of hazardous, harmful, and dependent drinking was 10.87, 8.1, and 3.12% respectively. Our narrative analysis showed that male sex, cigarette smoking, family history of alcohol use, missing ART medication, mental distress, khat chewing, low CD4 count, and low income were among the associated factors for AUD in people with HIV AIDS. On quantitative meta-analysis for associated factors of AUD, the AOR of being male, Cigarette smoking and khat chewing were 5.5, 3.95, and 3.34 respectively.

Conclusion

The average 1 year prevalence of AUD in HIV/AIDs patients was high and qualitatively factors such as being Male, cigarette smoking, and khat chewing were associated with it. Therefore, clinical services for people living with HIV/AIDS should integrate this public health problem. Policymakers should also develop guidelines and implementation strategies for addressing this problem.

Association between rs11362 polymorphism in the beta-defensin 1 (DEFB1) gene and dental caries: A meta-analysis

OBJECTIVES

Beta-defensin 1, encoded by the DEFB1 gene, is an important molecule that confers protection from dental caries. Numerous studies have been conducted on the rs11362 polymorphism in the DEFB1 gene. We evaluated the results from studies that have investigated the association between rs11362 polymorphism and dental caries, through a meta-analysis.

METHODS

This meta-analysis was designed according to the PRISMA statement guideline. Electronic databases (PubMed, Web of Science, Scopus, and Cochrane Library) were scanned by two independent researchers. The publication bias was determined by statistical analyses using funnel plot, Egger regression test, and Begg and Mazumdar rank correlation test. Heterogeneity was evaluated using the chi-square test, tau-square, and Higgins I² test. Odds ratio (OR) was used to measure the effect size.

RESULTS

Rank correlation and regression procedures showed the absence of publication bias in the meta-analysis (p > 0.05). The DEFB1 rs11362 polymorphism in the heterozygous (CC vs. CT: OR = 2.20, 95% confidence interval (CI): 1.17, 4.10; p = 0.014) and dominant (CC vs. CT + TT: OR = 3.11, 95% CI: 1.18, 8.21; p = 0.022) models in the permanent dentition subgroup showed significant differences. However, there was no significant difference between any model in either the deciduous dentition (p > 0.05) or the mixed dentition subgroups (p > 0.05).

CONCLUSIONS

This meta-analysis suggests that the DEFB1 rs11362 polymorphism is associated with dental caries in permanent dentition. Moreover, individuals with the TT genotype were found to have seven times higher risk of dental caries than individuals with the CC genotype. There was no such association or statistical difference observed for deciduous and mixed dentitions.

The prevalence and risk factors of work-related musculoskeletal disorders among adults in Ethiopia: a study protocol for extending a systematic review with meta-analysis of observational studies

BACKGROUND

Work-related musculoskeletal disorders impose a significant and most often underappreciated burden to the individual, nation, healthcare system, and society as a whole. To the best of our knowledge, there is a lack of reliable estimates on the prevalence of work-related musculoskeletal disorders in Ethiopia. The objective of this study will be to assess the existing literature on the prevalence rates and determinant factors of work-related musculoskeletal disorders in Ethiopia.

METHOD

We will search PubMed/MEDLINE, Embase, SCOPUS, PsycINFO, PEDro, and Ebsco (from January 2000 onwards). Gray literature will be identified through searching Google Scholar and dissertation databases. Observational studies reporting on the prevalence of work-related musculoskeletal disorders among adult Ethiopians will be included. The primary outcome will be the prevalence of work-related musculoskeletal disorders. Secondary outcomes will be the prevalence of any risk factors in association with work-related musculoskeletal disorders. Two reviewers will independently screen all citations, full-text articles, and abstract data. The study methodological quality (or bias) will be appraised using an appropriate tool. If feasible, we will conduct random effects meta-analysis of observational data. Subgroup analyses will be conducted to explore the potential sources of heterogeneity (e.g., gender, sample size, type of occupation). Publication bias and heterogeneity between the included studies will also be assessed and reported.

DISCUSSION

This systematic review will provide a synthesis of the literature on the prevalence of work-related musculoskeletal disorders and their risk factors in Ethiopia. The results of this review could help the policymakers in occupational health and healthcare sectors in identifying priority areas for interventions in work-related musculoskeletal disorders and will also serve as a baseline for the decision-making processes of musculoskeletal health promotion, work exposure implementations, and prevention programs in workplaces.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO, CRD42020164240.

Prevalence and determinants of alcohol use among adults living with HIV/AIDS in Ethiopia: a systematic review protocol

BACKGROUND

Alcohol use is a challenging problem which attributes to more than 5% of the overall global burden of disease. It is more common among persons with HIV infection than the general population. Although there are separate studies regarding people with HIV/AIDS in Ethiopia, their results are highly variable and discrepant. The objectives of this study will be to evaluate the prevalence of alcohol use and to identify its associated factors among people with HIV/AIDS in Ethiopia.

METHODS

A systematic search of electronic databases (from inception onwards) of PubMed/MEDLINE, Embase, PsycINFO, and Cochrane Library will be conducted. Moreover, grey literatures will be searched from different sources (such as Google Scholar, OpenGrey, and World Health Organization websites). Reference lists of the selected articles will also be searched manually. Observational studies (cross-sectional, case-control, cohort) reporting the prevalence of alcohol use and/or its associated factors among adults with HIV/AIDS in Ethiopia will be included. The primary outcomes will be the prevalence of alcohol use among HIV/AIDS population. Secondary outcomes will be the determinants of alcohol use described in the included studies. Two reviewers will independently screen all citations and full-text articles and extract data. The studies' methodological quality (or bias) will be appraised using an appropriate tool. If feasible, we will conduct a random effects meta-analysis of observational data. Heterogeneity of primary studies will be assessed using the I² test. Prevalence estimates will be stratified according to gender, age, and geographical location. Small-study effects (publication bias) also will be examined.

DISCUSSION

Our systematic review and meta-analysis will prevail the pooled prevalence of alcohol use and its determinants among people with HIV/AIDS in Ethiopia. The finding of this study will be helpful to design appropriate preventive and interventional strategies for alcohol use among people with HIV/AIDS. This can have direct or indirect policy responses and clinical implications.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42019132524.

A meta-analysis of depressive symptoms among Ethiopian prisoners and a narrative description of its associated factors: a country based systematic review and meta-analysis study

BACKGROUND

The burden of depression in prisoners is increasing and factors such as co-existence of medical illness, lack of social support and longer duration of sentences are contributing to it. However, no pooled evidence on the magnitude and factors of depression in prisoners existed in Ethiopia. The current meta-analysis was therefore aimed to have aggregate evidence on the magnitude and factors of depression in prisoners of Ethiopia.

METHODS

A search of databases on PubMed, Scopus, and EMBASE was carried out systematically. Besides, grey literature sources were extensively investigated. Moreover, the reference lists of the articles selected were searched. Random effects and quality-effects models were used to describe the pooled prevalence of depressive symptoms with 95% CI. We also detect heterogeneity between studies using Cochran's Q- statistic and the Higgs I² test. A sensitivity analysis was also implemented. Publication bias was checked with Egger's test and funnel plots visually.

RESULTS

Among 232 papers identified through the specified database searches only 17 full-text articles were assessed for eligibility and only nine (9) studies fulfilled the prespecified criteria and incorporated in the final meta-analysis. The pooled prevalence of Depressive symptoms among prisoners was 53.40%(95% CI: 41.33, 65.46). The pooled prevalence of Depressive symptoms in prisoners was 41.9% in Southwest Ethiopia, 44.43% in North West of Ethiopia, 59.05% in Addis Ababa, and 72.7% Southern Ethiopia. Besides, the pooled Depression symptoms prevalence among prisoners was 51.24% as measured with PHQ-9 and 56.15% with BDI-II. Besides, studies that utilized a relatively large sample size (≥350) yields a smaller pooled prevalence of Depression symptoms, 51.93% than those which utilized smaller sample sizes (< 350); 54.13%.

CONCLUSION

The pooled magnitude of depression in prisoner's population is very high, 53.40%. This pooled effect size for the Depression symptoms was significantly higher in the southern region of the country than in the southwest region. Besides, the pooled prevalence was significantly higher as measured by the BDI-II tool than by PHQ-9. Also, studies that utilized a larger sample size provided a significantly lower pooled magnitude of symptoms of depression than studies that utilized a smaller sample size.

Prevalence and Factors Associated with Current Cigarette Smoking among Ethiopian University Students: A Systematic Review and Meta-Analysis

BACKGROUND

Although tobacco use is highest in high-income countries, most tobacco-related deaths occur in low- and middle-income countries with the highest number of deaths recorded in East Africa. The aim of this systematic review and meta-analysis is to determine the pooled prevalence and associated factors of current cigarette smoking among Ethiopian university students.

METHODS

The authors searched databases from PubMed, PsycINFO, Google Scholar, EMBASE, and Web of Sciences. The publications included in the analysis were inclusive, the literature was searched from January 2011 to December 2018. The JBI-MAStARI critical appraisal tool was applied to 13 publications identified by the database search. I2 statistics were used to indicate heterogeneity. Publication bias was evaluated using the visual funnel plot. A p value < 0.1 was considered as indicative of statistically significant publication bias. A random effect meta-analysis model was computed to estimate the pooled prevalence of cigarette smoking, and the variables associated with cigarette smoking were examined.

RESULTS

The meta-analysis of 13 studies showed that the pooled prevalence of current cigarette smoking was found to be 12.55% (95% CI: 10.39-14.72; I2 = 94.0%) with no publication bias according to Egger's test (p = 0.007) for cigarette smoking by 2.05 (95% CI: 1.52-2.75). Factors associated with cigarette smoking were peer influence 2.79 (95% CI: 1.62-4.82; I2 = 35.7), khat chewing (95% CI: 2.81-15.26; I2 = 82.5), and alcohol use 11.16 (95% CI: 7.46-16.71).

CONCLUSION

Our findings indicate a high prevalence of cigarette smoking among Ethiopian university students as compared to the general population. Gender, peer influence, khat chewing, and current alcohol use were significantly associated with cigarette smoking. The authors recommend promoting antismoking campaigns, emphasizing health hazard public service announcements about cigarettes, and integrating health education on smoking in youth-friendly services, especially targeting higher educational institutions.

The Magnitude of Medication Administration Errors among Nurses in Ethiopia: a Systematic Review and Meta-analysis

Introduction: Nurses are the final safety check in the process of medication administration process to prevent errors that adversely affect life; yet death of comprehensive evidences in Ethiopia. The present study aimed to assess the pooled magnitude of MAEs (Medication Administration Errors) in Ethiopia. Methods: Systematic literature search in the databases of Pub-Med, Cochrane, and Google Scholar for gray literature were performed until December 3, 2018. The quality of study was assessed using criteria adopted from similar studies. Heterogeneity test and evidence of publication bias were assessed. Moreover, sensitivity analysis was also performed. Pooled prevalence of MAE was calculated using the random effects model. Results: A total of 2142 medication administrations were from observational and 681from self-reported studies were included in this systematic review and meta-analysis. The most prevalent and frequently reported type of MAEs was documentation error (52% to 87.5%) and time error (25.5% to 58.5%) respectively. Overall, the pooled magnitude of MAE was found to be 39.3% (95% CI, 29.1%-49.5%).It has no evidence of significant heterogeneity (I2 = 0%, P = 0.57) and publication bias Egger's test (P = 0.40). Conclusion: Overall, more than one in four observed/perceived medication administrations had errors. Documentation error is the most prevalent type of error. Nurses are suggested to strengthen their focus on the rights of medication administration guide particularly, documentation of their activities need special attention.

Domestic violence related disclosure among women and girls in Ethiopia: a systematic review and meta-analysis

Background

Domestic violence is common public health problem. Domestic violence related disclosure is an important first step in the process of prevention, control and treatments of domestic violence related adverse effect. Thus, this systematic review and meta-analysis aimed to determine the pooled prevalence of domestic violence related disclosure and synthesize its associated factors.

Methods

We followed the PRISMA Guidelines to report the results of the finding. Databases including PubMed, Cochrane Library and Web of Sciences were searched. The heterogeneity between studies was measured by the index of heterogeneity (I² statistics) test. Funnel plots and Egger’s test were used to determine publication bias. Moreover, sensitivity analysis was carried out. To calculate the pooled prevalence, a random effects model was utilized.

Results

Twenty one eligible studies were included in this systematic review and meta-analysis. The pooled prevalence of domestic violence related non-disclosure was found to be 36.2% (95% CI, 31.8–40.5%). Considering violence as normal or not serious, shame, embarrassment and fear of disclosure related consequences were the common barriers for non-disclosure.

Conclusion

More than one third of women and girls were not disclosed their experience of domestic violence. The finding of this study suggests the need of evaluation and strengthening of the collaborative work among different sectors such as: policy-makers, service providers, administrative personnel and community leaders including the engagement of men partner. This study also suggests the needs of women empowerments against the traditional belief, attitude, and practice.

Effectiveness, efficiency and adverse effects of using direct or indirect bonding technique in orthodontic patients: a systematic review and meta-analysis

Background

The direct and indirect bonding techniques are commonly used in orthodontic treatment. The differences of the two techniques deserve evidence-based study.

Materials and methods

Randomized controlled trials (RCTs), wherein direct and indirect bonding techniques were used in orthodontic patients were considered. The MEDLINE, EMBASE, CENTRAL and Web of Science databases were searched to identify relevant articles published up to December 2018. Grey literature was also searched. Two authors performed data extraction independently and in duplicate using the data collection form. The included trials were assessed using the Cochrane risk of bias assessment tool.

Results

Of the 1557 studies screened, 42 full articles were scrutinized and assessed for eligibility. Eight RCTs (247 participants) were finally included for the analyses. The qualitative synthesis showed that no significant difference existed in the accuracy of bracket placement and oral hygiene status between the two bonding techniques. The indirect bonding was found to involve less chairside time but more total working time compared with the direct bonding. The meta-analysis on bond failure rate demonstrated no significant difference between the direct and indirect bonding (RR = 1.13, 95% CI = 0.78–1.64, I² = 22%, P = 0.50). Consistent results were obtained in the subgroup analyses and sensitivity analyses.

Conclusion

Weak evidence suggested that the direct and indirect bonding techniques had no significant difference in bracket placement accuracy, oral hygiene status and bond failure rate, for bonding orthodontic brackets. The indirect bonding might require less chairside time but more total working time in comparison with the direct bonding technique. High-quality well-designed randomized controlled trials are needed before a conclusive recommendation could be made.

Electronic supplementary material

The online version of this article (10.1186/s12903-019-0831-4) contains supplementary material, which is available to authorized users.

Prevalence of suicidal ideation, suicidal attempt and completed suicide in Ethiopia: a systematic review and meta-analysis protocol

BACKGROUND

Suicide is an emergency psychiatric problem that needs an urgent intervention. Ethiopia, as a nation, has been experiencing high burden of suicide. Cultural taboo, stigma, and criticism associated with suicidal behaviors affect the communities' attitude and practice toward suicide and its help-seeking behaviors. Thus, this systematic review and meta-analysis will provide the pooled prevalence of suicidal ideation, suicidal attempt, and completed suicide in Ethiopia.

METHODS

This review protocol is designed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analysis Protocols (PRISMA-P 2015 Guidelines). Studies reporting the prevalence of suicidal ideation, suicidal attempt, and completed suicide will be included from the databases of PubMed/MEDLINE, Cochrane Library, SCOPUS, EMBASE, and Web of Sciences. The reference lists of retrieved articles, Google Scholar, and national health database reporting suicide will be also searched. No time and language restrictions will be imposed on the search strategy. The methodological quality of included studies will be assessed using the Joanna Briggs Institute critical appraisal tool. The heterogeneity between studies will be measured by the index of heterogeneity (I2 statistics) test. Funnel plots and Egger's test will be used to determine publication bias. Moreover, subgroup and sensitivity analyses will be carried out. The pooled prevalence of suicidal ideation, suicidal attempt, and completed suicide will be calculated by metaprop command using random effects model with the Dersimonian and Laird method.

DISCUSSION

This systematic review and meta-analysis aims to explore the available epidemiological evidences about suicidal ideation, suicidal attempt, and completed suicide. The final results of this review will be submitted for publication in a peer-reviewed journal and presented at conferences. The review of the results will help to raise awareness about the burden of suicidal ideation, suicidal attempt, and completed suicide in Ethiopia.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42018112836.

Prevalence and determinants of mental distress among university students in Ethiopia: a systematic review protocol

BACKGROUND

Mental distress is an important public health problem and becoming a common health problem among university students. This systematic review and meta-analysis will provide the pooled prevalence of mental distress and identify determinant factors associated with mental distress among university students in Ethiopia.

METHOD

A systematic search of PubMed, EMBASE, and PsycINFO databases will be conducted. In addition, we will search grey literature resources such as a database/website of dissertations and theses, WHO websites, and websites of professional bodies. Reference lists of the selected articles will also be searched for additional articles. All observational studies reporting the prevalence of mental distress and/or associated factors among university students in Ethiopia will be included. Pooled prevalence with 95% confidence interval (95% CI) will be calculated using random-effects and quality-effects models. Subgroup and sensitivity analyses will be performed. Heterogeneity between studies and evidence of publication bias will also be assessed.

DISCUSSION

The proposed systematic review and meta-analysis will provide a pooled prevalence of mental distress and associated factors to assist policy-makers and programme managers in developing evidence-based mental health promotion and prevention programmes in university/college settings.

SYSTEMATIC REVIEW REGISTRATION

PROSPERO CRD42017067223.

The prognostic impact of decreased pretreatment haemoglobin level on the survival of patients with lung cancer: a systematic review and meta-analysis

BACKGROUND

Many studies have reported the prognostic value of haemoglobin level for cancers. Whereas the prognostic impact of decreased pretreatment haemoglobin level on the survival of patients with lung cancer remains controversial, herein, a systematic review and meta-analysis were conducted to investigate whether a decreased haemoglobin level before treatment is a significant predictor of survival in patients with lung cancer.

METHODS

We performed a systematic review and meta-analysis of observational studies to evaluate the prognostic impact of a decreased haemoglobin level on the survival of patients with lung cancer. Relevant studies were retrieved from databases including PubMed, Embase, Web of Science and the Cochrane Library. Reference lists were hand-searched for potentially eligible studies. The Newcastle-Ottawa scale was used to assess the quality of included studies. Observational studies were included if they provided sufficient information for the extraction of the pooled hazard ratios (HR) and 95% confidence intervals (95% CI) for overall survival, disease-free survival, relapse-free survival, progression-free survival, event-free survival and time to progression. Subgroup analysis, meta-regression and sensitivity analyses were applied to explain the heterogeneity.

RESULTS

Fifty-five articles involving a total of 22,719 patients were obtained to evaluate the correlation between haemoglobin level and survival. The results indicated that decreased haemoglobin level was significantly associated with poor overall survival of patients with lung cancer (HR 1.51, 95% CI 1.42-1.61), both in non-small cell lung cancer (HR 1.57, 95% CI 1.44-1.72) and in small cell lung cancer (HR 1.56, 95% CI 1.21-2.02). We also found that the lower the haemoglobin level, the shorter was the overall survival of patients with lung cancer (HR 1.11, 95% CI 1.06-1.16). However, the relationship between decreased haemoglobin and relapse-free survival was not significant (HR 1.37, 95% CI 0.91-2.05).

CONCLUSION

A decreased pretreatment haemoglobin level among patients with lung cancer is a prognostic factor of poor survival that can serve as an important indicator in survival prediction, risk stratification and treatment selection. In clinical practice, more attention should be paid to monitoring pretreatment haemoglobin levels among patients with lung cancer.

Breastfeeding Versus Bottle Feeding on Malocclusion in Children: A Meta-Analysis Study

BACKGROUND

Breastfeeding plays an important role in child health. However, there are doubts about its influence on malocclusions. Systematic reviews have yielded contradictory results. Research aim: This study aimed to investigate whether the type and duration of breastfeeding are associated with malocclusions in primary teething.

METHODS

The review strategy included several electronic databases, lists of references, reviews, dissertation and thesis websites, experts, and other relevant documents. Published and unpublished observational studies ( N = 42) were reviewed using the Participants (children), Interventions (breastfeeding), Comparisons (bottle feeding), Outcomes (malocclusion), and Study design (observational) strategy, without restrictions on language or locale. Information about the authors, publication year, country of study, setting, study design, sample size, age, type and duration of exclusive and mixed breastfeeding, and malocclusions was recorded by two blinded evaluators. Quantitative meta-analysis ( N = 30) of the studies with available data was performed.

RESULTS

Breastfeeding was a protective factor against malocclusions. The odds of association increased with breastfeeding duration. Irrespective of duration, breastfeeding had a protective association with open bite. For those who were breastfed for up to 6 months, breastfeeding protected against overjet, open bite, posterior crossbite, and crowding. Breastfeeding for 12 months or longer was associated with lower odds of overjet, open bite, and posterior crossbite. Breastfeeding exclusively for 6 months was also a protective factor against malocclusions. However, studies on this subject presented low quality, statistical heterogeneity, and only unadjusted measures of association in most of the cases.

CONCLUSION

Breastfeeding beneficially affects primary occlusion when practiced for at least 6 months.

A systematic review of Drosophila short-term-memory genetics: Meta-analysis reveals robust reproducibility

Geneticists use olfactory conditioning in Drosophila to identify learning genes; however, little is known about how these genes are integrated into short-term memory (STM) pathways. Here, we investigated the hypothesis that the STM evidence base is weak. We performed systematic review and meta-analysis of the field. Using metrics to quantify variation between discovery articles and follow-up studies, we found that seven genes were both highly replicated, and highly reproducible. However, ∼80% of STM genes have never been replicated. While only a few studies investigated interactions, the reviewed genes could account for >1000% memory. This large summed effect size could indicate irreproducibility, many shared pathways, or that current assay protocols lack the specificity needed to identify core plasticity genes. Mechanistic theories of memory will require the convergence of evidence from system, circuit, cellular, molecular, and genetic experiments; systematic data synthesis is an essential tool for integrated neuroscience.

Depression and Its Help Seeking Behaviors: A Systematic Review and Meta-Analysis of Community Survey in Ethiopia

BACKGROUND

Depression is one of the most common mental illnesses affecting around 322 million individual in the world. Although the prevalence of depression is high and its treatment is effective, little is known about its pooled prevalence and help seeking behaviors in the community settings of Ethiopia. Thus, this study aimed to determine the pooled prevalence of depression and its help seeking behaviors in Ethiopia.

METHODS

A systematic literature search in the databases of Pub-Med, Cochrane, and Google Scholar was performed. The quality of studies was assessed using the Newcastle-Ottawa quality assessment tool adapted for cross-sectional studies. Heterogeneity test and evidence of publication bias were assessed. Moreover, sensitivity test was also performed. Pooled prevalence of depression and its help seeking behavior were calculated using random effects model.

RESULTS

A total 13 studies for depression, 4 studies for help seeking intention, and 5 studies for help seeking behaviour were included in this review. The pooled prevalence of depression and help seeking intention and behaviour was found to be 20.5% (95% CI; 16.5% -24.4%), 42% (95% CI; 23%-60%), and 38% (95% CI; 23%-52%), respectively. There is no significant heterogeneity for depression (I² = 0%, p =0.620), help seeking intention (I² = 0%, p =0.996), and behaviour (I² = 0%, p =0.896). There is no publication bias for depression egger's test (p =0.689).

CONCLUSION

More than one in every five individuals were experiencing depression. Less than one-third of individuals with depression seek help from modern treatment. Authors suggest community based mental health screening and treatment.