نتایج جستجو برای: meta technology ratio

تعداد نتایج: 1097532  

2014
Nick Meader Kristel King Alexis Llewellyn Gill Norman Jennifer Brown Mark Rodgers Thirimon Moe-Byrne Julian PT Higgins Amanda Sowden Gavin Stewart

BACKGROUND The grading of recommendation, assessment, development and evaluation (GRADE) approach is widely implemented in health technology assessment and guideline development organisations throughout the world. GRADE provides a transparent approach to reaching judgements about the quality of evidence on the effects of a health care intervention, but is complex and therefore challenging to ap...

Journal: :journal of research in medical sciences 0
marjan mansourian department of biostatistics, school of public health, isfahan university of medical sciences, isfahan, iran shaghayegh haghjooy javanmard department of physiology, physiology research center, isfahan university of medical sciences, isfahan, iran

normal 0 false false false en-us x-none ar-sa previous studies have inspected the associations between adiponectin (adipoq) 276g/t polymorphisms and atherosclerosis, but the results are inconclusive. the aim of this study was to explore the relationship between polymorphism +276 g > t (rs1501299) in adipoq and atherosclerosis. a widespread search was directed to identify all studies on the asso...

اکبری کامرانی, احمد علی, بصیر غفوری, حامد, شعاعی, فاطمه, صحاف, رباب, ظریف یگانه, مریم, فروغان, مهشید, مدیریان, احسان, کلاهدوز, فریبا,

Objectives: There have been several studies published in the medical literature over the past 30 years that address the association between tea consumption and osteoporosis with inconsistent findings. A meta-analysis was undertaken, including 8 studies, to determine the effect of tea consumption on the risk of fracture. Methods & Materials: This systematic review and meta-analysis conducted ...

ژورنال: پژوهش در پزشکی 2005
حمید علوی مجد, , مریم شبیری, , نایبعلی احمدی, , یدا... محرابی, ,

 Background : Meta analysis is a statistical method to combine the findings of a set of large number of published individual studies and re-analyse them. The use of meta-analysis methods in medical research has been increased, noticeably, in resent years. However, one of the major shortcomings in such analysis is that the researcher, could not access all conducted studies in the area of concern...

2018
Ben Vandermeer Ingeborg van der Tweel Marijke C. Jansen-van der Weide Stephanie S. Weinreich Despina G. Contopoulos-Ioannidis Dirk Bassler Ricardo M. Fernandes Lisa Askie Haroon Saloojee Paola Baiardi Susan S. Ellenberg Johanna H. van der Lee

BACKGROUND We wished to compare the nuisance parameters of pediatric vs. adult randomized-trials (RCTs) and determine if the latter can be used in sample size computations of the former. METHODS In this meta-epidemiologic empirical evaluation we examined meta-analyses from the Cochrane Database of Systematic-Reviews, with at least one pediatric-RCT and at least one adult-RCT. Within each meta...

Journal: :International journal of epidemiology 2013
Anna Chaimani Haris S Vasiliadis Nikolaos Pandis Christopher H Schmid Nicky J Welton Georgia Salanti

BACKGROUND Empirical research has illustrated an association between study size and relative treatment effects, but conclusions have been inconsistent about the association of study size with the risk of bias items. Small studies give generally imprecisely estimated treatment effects, and study variance can serve as a surrogate for study size. METHODS We conducted a network meta-epidemiologic...

2016
Louise F. Wilson Gita D. Mishra

BACKGROUND Although rates have declined, hysterectomy is still a frequent gynaecological procedure. To date, there has been no systematic quantification of the relationships between early/mid-life exposures and hysterectomy. We performed a systematic review and meta-analyses to quantify the associations between age at menarche, education level, parity and hysterectomy. METHODS Eligible studie...

Journal: :hepatitis monthly 0
haiying zhang department of gastroenterology, the second affiliated hospital of medical college, qingdao university, qingdao, china; department of gastroenterology, qingdao central hospital, qingdao, china; department of gastroenterology, the second affiliated hospital of medical college, qingdao university, qingdao, china. tel: +86-53284963627, fax: +86-53288905293, e-mail:; shiying xuan, department of gastroenterology, qingdao municipal hospital, qingdao, china. tel: +86-53288905289, fax: +86-53288905293 li xue department of gastroenterology, the second affiliated hospital of medical college, qingdao university, qingdao, china; department of gastroenterology, qingdao central hospital, qingdao, china lizhen chen medical college, qingdao university, qingdao, china shunshun jiang department of gastroenterology, the second affiliated hospital of medical college, qingdao university, qingdao, china; department of gastroenterology, qingdao central hospital, qingdao, china yongning xin department of gastroenterology, qingdao municipal hospital, qingdao, china shiying xuan department of gastroenterology, qingdao municipal hospital, qingdao, china; department of gastroenterology, the second affiliated hospital of medical college, qingdao university, qingdao, china. tel: +86-53284963627, fax: +86-53288905293, e-mail:; shiying xuan, department of gastroenterology, qingdao municipal hospital, qingdao, china. tel: +86-53288905289, fax: +86-53288905293

conclusions the current meta-analysis showed an association between frequency of gg genotype of pnpla3 and the risk of development of chc in various populations throughout the world. results five hospital-based case-control studies were included in the final analysis. the overall frequency of pnpla3 gene polymorphisms was 20.4% (205/1005) in chc and 10.23% (53/518) in controls. the summary odds...

2011
Su Golder Yoon K. Loke Martin Bland

BACKGROUND There is considerable debate as to the relative merits of using randomised controlled trial (RCT) data as opposed to observational data in systematic reviews of adverse effects. This meta-analysis of meta-analyses aimed to assess the level of agreement or disagreement in the estimates of harm derived from meta-analysis of RCTs as compared to meta-analysis of observational studies. ...

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