Context The clinical course of Parkinson disease (PD) varies from patient to patient. A
number of studies investigating predictors of prognosis in patients with PD have been …

Health care decisions are increasingly being made on research-based evidence rather than
on expert opinion or clinical experience alone. Systematic reviews represent a rigorous …

ContextSpecific features of trial quality may be associated with exaggeration or shrinking of
the observed treatment effect in randomized studies. Therefore, assessment of trial quality is …

ContextThe ability to identify scientific journals that publish high-quality research would help
clinicians, scientists, and health-policy analysts to select the most up-to-date medical …

Colle F, Rannou F, Revel M, Fermanian J, Poiraudeau S. Impact of quality scales on levels
of evidence inferred from a systematic review of exercise therapy and low back pain. Arch …

Background The aim of this study was to examine the determinants of publication and
whether publication bias occurred in gastroenterological research. Methods A random …

Background: Aminoglycosides, combined with antianaerobic agents, have been used widely
for the treatment of intra-abdominal infection. However, some prospective randomized …

This paper examines some of the problems specifically associated with conducting research
into acupuncture and how this can lead to further problems with subsequent systematic …

Study objective: In 1997, Annals of Emergency Medicine initiated a protocol by which every
original research article, in addition to each regular review, was concurrently evaluated by 1 …

Study objective: We examine how dedicated methodology and statistical review affects the
quality of manuscripts published in Annals of Emergency Medicine. Design: The dedicated …