Welcome to the second edition of Doing A Systematic Review: A Student's Guide! It strikes
us as odd that the preface to the second edition of a book usually assumes that the reader is …

Controversy continues about the use of beta‐mimetic drugs in preterm labour. One reason
for this is that the adequately controlled trials of these drugs have all been small and have …

Objective.—To determine if inadequate approaches to randomized controlled trial design
and execution are associated with evidence of bias in estimating treatment effects. Design …

Systematic literature reviews including meta-analyses are invaluable scientific activities. The
rationale for such reviews is well established. Health care providers, researchers, and policy …

Publication bias is the tendency on the parts of investigators, reviewers, and editors to
submit or accept manuscripts for publication based on the direction or strength of the study …

When the first edition of Clinical Decision Support Systems was published in 1999, I began
the preface with the statement,“We are at the beginning of a new era in the application of …

Publication bias, the phenomenon in which studies with positive results are more likely to be
published than studies with negative results, is a serious problem in the interpretation of …

Objective.—To investigate factors associated with the publication of research findings, in
particular, the association between" significant" results and publication. Design.—Follow-up …

This article presents evidence that published results of scientific investigations are not a
representative sample of results of all scientific studies. Research studies from 11 major …

Meta-analysis consists of quantitative methods for combining evidence from different studies
about a particular issue. A frequent criticism of meta-analysis is that it may be based on a …