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"Publication bias"

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https://www.readbyqxmd.com/read/28810833/population-effectiveness-of-the-pentavalent-and-monovalent-rotavirus-vaccines-a-systematic-review-and-meta-analysis-of-observational-studies
#1
Daniel Hungerford, Katie Smith, Angela Tucker, Miren Iturriza-Gómara, Roberto Vivancos, Catherine McLeonard, Nigel A Cunliffe, Neil French
BACKGROUND: Rotavirus was the leading cause of acute gastroenteritis (AGE) in infants and young children prior to the introduction of routine vaccination. Since 2006 there have been two licensed vaccines available; with successful clinical trials leading the World Health Organization to recommend rotavirus vaccination for all children worldwide. In order to inform immunisation policy we have conducted a systematic review and meta-analysis of observation studies to assess population effectiveness against acute gastroenteritis...
August 15, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28809927/in-middle-aged-and-old-obese-patients-training-intervention-reduces-leptin-level-a-meta-analysis
#2
Ildikó Rostás, László Pótó, Péter Mátrai, Péter Hegyi, Judit Tenk, András Garami, Anita Illés, Margit Solymár, Erika Pétervári, Ákos Szűcs, Andrea Párniczky, Dániel Pécsi, Zoltán Rumbus, Csaba Zsiborás, Nóra Füredi, Márta Balaskó
BACKGROUND: Leptin is one of the major adipokines in obesity that indicates the severity of fat accumulation. It is also an important etiological factor of consequent cardiometabolic and autoimmune disorders. Aging has been demonstrated to aggravate obesity and to induce leptin resistance and hyperleptinemia. Hyperleptinemia, on the other hand, may promote the development of age-related abnormalities. While major weight loss has been demonstrated to ameliorate hyperleptinemia, obese people show a poor tendency to achieve lasting success in this field...
2017: PloS One
https://www.readbyqxmd.com/read/28809372/coffee-is-protective-against-oral-and-pharyngeal-cancer-a-systematic-review-and-meta-analysis
#3
J Miranda, L Monteiro, R Albuquerque, J-J Pacheco, Z Khan, J Lopez-Lopez, S Warnakulasuryia
OBJECTIVES: Coffee is one of the most popular and consumable drinks worldwide. However, there are conflicting results on the influence of this drink in oral and pharyngeal cancer risk. To clarify this, we aimed to systemically review and carry out a meta-analysis of the relevant literature on the association between coffee and oral and pharyngeal cancer. STUDY DESIGN: We carried out an electronic search of publications up to August 2016 from PubMed, National Library of Medicines Medline, Embase, Science Direct and the Cochrane Central Register...
August 15, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28808864/elevated-bilirubin-levels-and-risk-of-developing-chronic-kidney-disease-a-dose-response-meta-analysis-and-systematic-review-of-cohort-studies
#4
REVIEW
Jun Wang, Peng Guo, ZhengYan Gao, BenGang Zhou, Lei Ren, Yu Chen, Quan Zhou
AIMS: Previous studies have indicated the link of bilirubin levels and risk of developing chronic kidney disease (CKD); however, the findings were inconsistent. METHODS: We searched for cohort studies examining bilirubin as an exposure and CKD as an outcome in the Medline, EMBASE, and Web of Science databases from inception through November 31, 2016. A generalized least-squares approach was applied to assess the dose-response relationship between them by pooling rate ratios with 95% confidence intervals...
August 14, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28807047/adverse-outcomes-associated-with-opioid-prescription-for-acute-low-back-pain-a-systematic-review-protocol
#5
Natalia Mouravska, Laura Zielinski, Meha Bhatt, Nitika Sanger, Monica Bawor, Brittany Dennis, Laura Banfield, James MacKillop, James Paul, Andrew Worster, Philip Laplante, Lehana Thabane, Zainab Samaan
BACKGROUND: Acute low back pain (ALBP) is the top cause of global disability, demonstrating a significant impact on individuals and society and demanding the need for appropriate management. There is a trend towards an increasing number of opioid prescriptions for ALBP despite the lack of investigation for its various short- and long-term outcomes. The objective of this review is to examine adverse outcomes associated with opioid use for ALBP. METHODS/DESIGN: Using a search strategy, the search will be conducted using the following electronic databases: PubMed/MEDLINE, EMBASE, PsycINFO, Cumulative Index to Nursing and Allied Health Literature (CINAHL), Web of Science, Cochrane Library, the National Institutes for Health Clinical Trials Registry and the World Health Organization International Clinical Trials Registry Platform (WHO ICTRP)...
August 14, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/28802796/antibacterial-prophylaxis-for-gram-positive-and-gram-negative-infections-in-cranial-surgery-a-meta-analysis
#6
REVIEW
Pranav Abraham, Nayan Lamba, Michael Acosta, Joanna Gholmie, Hassan Y Dawood, Matthew Vestal, Kevin Huang, Maher Hulou, Morteza Asgarzadeh, Hasan Zaidi, Rania A Mekary, Timothy R Smith
BACKGROUND: Perioperative antibiotic prophylaxis against gram positive and gram negative infections is considered standard of care in the perioperative management of patients undergoing cranial surgery. The antibiotic regimen which best reduces the risk of surgical site infections (SSIs) remains controversial. OBJECTIVES: A systematic literature review and meta-analysis were conducted to examine the effect of various prophylactic antibiotics on infection incidence among patients undergoing cranial surgeries...
August 9, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28802556/randomized-sham-controlled-trials-in-endoscopy-a-systematic-review-and-meta-analysis-of-adverse-events
#7
REVIEW
Allison R Schulman, Violeta Popov, Christopher C Thompson
BACKGROUND AND AIMS: Sham procedures in endoscopy are used with the intention of controlling for placebo response, potentially allowing more precise evaluation of treatment effect. Nevertheless, this type of study may impose significant risk without potential benefit for those in the sham group. The aim of the current study is to systematically review and analyze the endoscopic literature to assess the safety of sham controls. METHODS: MEDLINE and Embase databases were searched for endoscopic sham procedures for all dates through July 2017...
August 9, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28802529/breast-lesions-diagnosis-using-diffusion-weighted-imaging-at-1-5t-and-3-0t-systematic-review-and-meta-analysis
#8
Run-Yang Shi, Qiu-Ying Yao, Lian-Ming Wu, Jian-Rong Xu
INTRODUCTION: We compared the diagnostic performance of diffusion weighted imaging (DWI) acquired with 1.5T and 3.0T magnetic resonance (MR) units in differentiating malignant breast lesions from benign ones. MATERIALS AND METHODS: A comprehensive search of the PubMed and Embase databases was performed for studies reported from January 1, 2000 to February 19, 2016. The quality of the included studies was assessed. Statistical analysis included pooling of diagnostic sensitivity and specificity and assessing data inhomogeneity and publication bias...
July 5, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/28801932/introduction-comparison-and-validation-of-meta-essentials-a-free-and-simple-tool-for-meta-analysis
#9
Robert Suurmond, Henk van Rhee, Tony Hak
We present a new tool for meta-analysis, Meta-Essentials, which is free-of-charge and easy to use. In this paper, we introduce the tool and compare its features to other tools for meta-analysis. We also provide detailed information on the validation of the tool. Though free-of-charge and simple, Meta-Essentials automatically calculates effect sizes from a wide range of statistics and can be used for a wide range of meta-analysis applications, including subgroup analysis, moderator analysis, and publication bias analyses...
August 12, 2017: Research Synthesis Methods
https://www.readbyqxmd.com/read/28800602/mefv-m694v-mutation-has-a-role-in-susceptibility-to-ankylosing-spondylitis-a-meta-analysis
#10
Linqing Zhong, Hongmei Song, Wei Wang, Ji Li, Mingsheng Ma
OBJECTIVE: The aim of the current study was to determine the contributions of several common mutations in the Mediterranean fever (MEFV) gene, namely, E148Q, M680I, M694V and V726A, to ankylosing spondylitis (AS) susceptibility. METHODS: Two investigators independently searched the literature regarding the association of MEFV with AS in the PubMed, EMBASE, Web of Science, and Scopus databases. They independently selected eligible articles and then extracted data from the included studies...
2017: PloS One
https://www.readbyqxmd.com/read/28800068/galectin-3-performance-in-histologic-a-cytologic-assessment-of-thyroid-nodules-a-systematic-review-and-meta-analysis
#11
REVIEW
Pierpaolo Trimboli, Camilla Virili, Francesco Romanelli, Anna Crescenzi, Luca Giovanella
The literature on Galectin-3 (Gal-3) was systematically reviewed to achieve more robust information on its histologic reliability in identifying thyroid cancers and on the concordance between Gal-3 test in histologic and cytologic samples. A computer search of the PubMed and Scopus databases was conducted by combinations of the terms thyroid and Gal-3. Initially, 545 articles were found and, after their critical review, 52 original papers were finally included. They reported 8172 nodules with histologic evaluation of Gal-3, of which 358 with also preoperative FNAC Gal-3 assessment...
August 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28799100/associations-between-ccl21-gene-polymorphisms-and-susceptibility-to-rheumatoid-arthritis-a-meta-analysis
#12
REVIEW
Guomin Li, Jie Zhao, Bing Li, Jianxiong Ma, Qiubo Zhao, Xiaoquan Wang, Zhen Lv, Kuan Li, Zhongchao Du, Xinlong Ma, Jun Liu
Rheumatoid arthritis (RA) is a chronic systemic disorder characterized by the development through angiogenesis, which is dependent on endothelial cell activation, migration and proliferation and CCL21 plays an important role in this pathology. Currently, CCL21 gene polymorphism studies on rheumatoid arthritis are scarce and the results are diverse. This meta-analysis was performed to determine if CCL21 gene polymorphisms correlate with the risk of developing RA. Association reports for the relationship between CCL21 polymorphisms and RA were identified from PubMed, Cochrane Library, Embase, SCIELO, CNKI and Wanfang databases on March 22, 2017...
August 10, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28797919/the-efficacy-and-safety-of-using-a-bipolar-sealer-to-prevent-blood-loss-in-spine-surgery-a-meta-analysis
#13
REVIEW
Di Lu, Wei-Guo Ding, Hong-Feng Sheng, Xin-Wei Xu, Ying-Xiao Zhang, Weixing Xu
OBJECTIVE: The purpose of this systematic review and meta-analysis of randomized controlled trials (RCTs) and non-RCTs was to evaluate the effect of using a bipolar sealer to prevent surgical bleeding in spine surgery. METHODS: In June 2017, the PubMed, Embase, Cochrane controlled trials register, Web of Science, Google, and Chinese Wanfang databases were used to identify RCTs and non-RCTs comparing the effects of intraoperative placement of a bipolar sealer versus standard electrocautery with regard to blood loss and blood transfusion...
August 7, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28797050/correlation-between-p-stat3-overexpression-and-prognosis-in-lung-cancer-a-systematic-review-and-meta-analysis
#14
Mengting Tong, Jing Wang, Nanyu Jiang, Hongming Pan, Da Li
OBJECTIVE: Previous studies have shown the correlation between p-STAT3 overexpression and prognosis in a variety of human tumors. However, their correlation in lung cancer remains controversial. We performed a systematic review and meta-analysis to explore the correlation between p-STAT3 overexpression and prognosis in lung cancer patients. METHODS: We searched PubMed, Embase, Web of Science, CNKI, VIP, and WanFang Data to identify relevant studies. Two reviewers independently screened the literature search results, extracted data, and assessed the methodological quality of the included studies...
2017: PloS One
https://www.readbyqxmd.com/read/28796041/association-between-hypertension-and-risk-of-knee-osteoarthritis-a-meta-analysis-of-observational-studies
#15
Yi-Min Zhang, Jun Wang, Xiao-Guang Liu
Evidence from observational studies shows that hypertension may be a risk factor for knee osteoarthritis (OA). However, the relationship between hypertension and knee OA risk remains controversial. This study aimed to quantitatively assess the relationship between hypertension and risk of knee OA.Three electronic databases (PubMed, Embase, and Cochrane Library) were searched up to July 25, 2016. Odds ratios (ORs) and 95% confidence intervals (95% CIs) were extracted from the included observational studies. Publication bias, heterogeneity test, and subgroup analyses were performed...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28795833/publication-bias-and-stereotype-threat-research-a-reply-to-zigerell
#16
Ann Marie Ryan, Hannah-Hanh D Nguyen
Zigerell (2017) demonstrated that 4 methods of examining publication bias applied to the meta-analysis presented by Nguyen and Ryan (2008) on stereotype threat effects yield highly divergent conclusions. The methods differ in the estimated magnitudes of publication bias and of the stereotype threat effect. Zigerell (2017), Nguyen and Ryan (2008), and the current article all strongly urge researchers to pay attention to moderators of stereotype threat effects, and we provide commentary on the state of this research focus...
August 2017: Journal of Applied Psychology
https://www.readbyqxmd.com/read/28795832/potential-publication-bias-in-the-stereotype-threat-literature-comment-on-nguyen-and-ryan-2008
#17
L J Zigerell
Stereotype threat is a widely cited psychological phenomenon with purported important real-world consequences. Reanalysis of data from the Nguyen and Ryan (2008) stereotype threat meta-analysis indicated the presence of small study effects in which the effect size for less precise studies was larger than the effect size for more precise studies. Four methods to adjust the meta-analysis effect size for potential publication bias produced divergent estimates, from essentially no change, to a 50% decrease, to a reduction of the estimated effect size to near zero...
August 2017: Journal of Applied Psychology
https://www.readbyqxmd.com/read/28795826/competition-and-facilitation-in-compound-conditioning
#18
Gonzalo P Urcelay
Despite the generality and theoretical relevance of cue competition phenomena such as blocking and overshadowing, recent findings suggest that these observations may be due to some degree of publication bias, and that we lack insight into the boundary conditions of these phenomena. The present commentary does not question the existence of cue competition phenomena. Rather, I review findings showing that 3 variables, namely (a) relative stimulus duration, (b) contingency, and (c) contiguity parametrically determine not only whether cue competition is observed, but also whether no cue interaction, or cue facilitation occur...
August 10, 2017: Journal of Experimental Psychology. Animal Learning and Cognition
https://www.readbyqxmd.com/read/28795239/risk-of-low-energy-fracture-in-type-2-diabetes-patients-a-meta-analysis-of-observational-studies
#19
P Jia, L Bao, H Chen, J Yuan, W Liu, F Feng, J Li, H Tang
In this meta-analysis, evidence of an association between type 2 diabetes mellitus (T2DM) and low-energy fractures has been evaluated including 12 observational studies. The results suggested that T2DM patients had an enhanced risk of low-energy fractures. INTRODUCTION: Type 1 diabetes mellitus (T1DM) patients have been shown to be at enhanced risk of fracture injury, but less is known about low-energy fractures among patients with T2DM. METHODS: We performed a meta-analysis of 12 observational studies identified in Medline and EMBASE that included 938,742 participants, including 30,827 low-energy fracture cases...
August 9, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28793957/a-comparison-of-telavancin-and-vancomycin-for-treatment-of-methicillin-resistant-staphylococcus-aureus-infections-a-meta-analysis
#20
Yu Liu, Juan Wang
OBJECTIVE: The objective of this study was to systematically review and evaluate the efficacy and safety of telavancin and vancomycin in the treatment of infections due to methicillin-resistant Staphylococcus aureus (MRSA). MATERIALS AND METHODS: We performed a systematic literature search using Pubmed, Embase, VIP Chinese Science and Technique Journals Database, and Wanfang Database resulting in the inclusion of seven publications in this study. Outcomes were calculated using pooled relative risk (RR) and 95% confidence interval (CI)...
August 10, 2017: International Journal of Clinical Pharmacology and Therapeutics
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