Published in Research synthesis methods
For tests reporting continuous results, primary studies usually provide test performance at multiple but often different thresholds. This creates missing data when performing a meta-analysis at each threshold. A standard meta-analysis (no imputation [NI]) ignores such missing data. A single imputation (SI) approach was recently proposed to recover ...
Published in Stroke
The absence of treatments for intracerebral hemorrhage with significant consistent benefit in randomized controlled trials (RCTs) could be because of lack of treatment efficacy or the design of RCTs. We searched the Cochrane Stroke Group Trials Register in December 2015 for completed and published RCTs reporting clinical outcome in adults with intr...
Published in Research synthesis methods
There is a growing concern that much of the published research literature is distorted by the pursuit of statistically significant results. In a seminal article, Ioannidis and Trikalinos (2007, Clinical Trials) proposed an omnibus (I&T) test for significance chasing (SC) biases. This test compares the observed number of studies that report statisti...
Published in The Journal of arthroplasty
Healthcare policy is often determined by well-designed studies most often published in high-impact medical journals. However, concern about the presence of publication bias against lower-extremity arthroplasty-related studies has called into question some of the validity of certain reports. There are only a few studies investigating the presence of...
In 2010–2012, a few largely coincidental events led experimental psychologists to realize that their approach to collecting, analyzing, and reporting data made it too easy to publish false-positive findings. This sparked a period of methodological reflection that we review here and call Psychology's Renaissance. We begin by describing how psycholog...
This dissertation begins by demonstrating that publication bias can depend on factors other than statistical significance, including study characteristics like social preferences and source of funding. After providing an empirical example of differing bias patterns, the dissertation presents a weight-function model that is capable of accommodating ...
Published in Journal of Indian Society of Periodontology
The study aimed to determine the presence of publication bias in the top five dental journals with high impact factor published during 2007-2016. The journals included are Journal of Clinical Periodontology, Dental Materials, Clinical Oral Implant Research (COIR), Journal of Endodontics, and Journal of Dental Research (JDR). The content of these jo...
Cet article synthétise une étude de la puissance statistique des tests des articles publiés dans la revue Comptabilité – Contrôle – Audit depuis vingt ans et de ses déterminants. Pour ce faire, nous avons réalisé des analyses de puissance, bivariée et multivariée. À l’instar des études antérieures, les analyses de puissance et bivariée montrent un ...
Published in Trends in cancer
To prevent reporting bias, policies and regulations mandating trial prospective registration and disclosure of results have been implemented since 2005. To achieve full trial transparency, open access to participants' deidentified data policies have been issued. Funders and journals have made critical decisions on these requirements in 2017 that wi...
Published in London journal of primary care
In this paper I examine the relationship between benefits, harms and evidence-based medicine in the context of British primary healthcare. First, I will examine: 'What is a benefit and what is a harm?' Second, what should we know about where the balance of risk and benefit appear to lie? Third, what should we do with this knowledge, particularly in...
