Risk of bias assessment should not go beyond reporting assessment

assessment of the efficiency of s.p.g.c refineries using network dea

data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...

Survivor bias and risk assessment.

I n the current issue of the European Respiratory Journal, LEE et al. [1] have done excellent work developing and validating a risk equation for incident pulmonary arterial hypertension (PAH) patients in the UK. In addition, they have very helpfully summarised the differences and similarities between the newly developed Scottish composite score (SCS) and other contemporary PAH survival equation...

Assessment of Reporting Bias for Clostridium difficile Hospitalizations, United States

To the Editor: Burckhardt et al. (1) recently reported on Clostridium diffi cile–associated disease (CDAD) in Saxony, Germany. In contrast to the observation by Wilcox and Fawley in the United Kingdom (2), the report from Germany argued against a reporting bias for gastroenteritides as a cause of the observed increase in the incidence of CDAD diagnoses from 2002 through 2006. To explore this is...

Rethinking the assessment of risk of bias due to selective reporting: a cross-sectional study

BACKGROUND Selective reporting is included as a core domain of Cochrane's tool for assessing risk of bias in randomised trials. There has been no evaluation of review authors' use of this domain. We aimed to evaluate assessments of selective reporting in a cross-section of Cochrane reviews and to outline areas for improvement. METHODS We obtained data on selective reporting judgements for 843...

Beyond X 2.0: Where Should We Go?