Results 241 to 250 of about 1,004,406 (261)
Some of the next articles are maybe not open access.

Those Confounded Vitamins: What Can We Learn From the Differences Between Observational Versus Randomised Trial Evidence?

Lancet, The, 2004
Shah Ebrahim, Deborah A. Lawlor
exaly  

Observational Studies

2022
openaire   +1 more source

Beyond Randomised Versus Observational Studies

Lancet, The, 2004
Ralph I Horwitz
exaly  

Cosmos-e: Guidance on Conducting Systematic Reviews and Meta-Analyses of Observational Studies of Etiology

PLoS Medicine, 2019
Jan Vandenbroucke   +2 more
exaly  

The HRT Controversy: Observational Studies and RCTs Fall in Line

Lancet, The, 2009
Jan Vandenbroucke
exaly  

Quality Assessment of Observational Studies Is Not Commonplace in Systematic Reviews

Journal of Clinical Epidemiology, 2006
George Peat   +2 more
exaly  

Observational Studies

2005
Anastasia Kitsantas   +2 more
openaire   +1 more source

The REporting of Studies Conducted Using Observational Routinely-Collected Health Data (RECORD) Statement

PLoS Medicine, 2015
Astrid Guttmann   +2 more
exaly  

Observational Study

2013
Chad D. Jensen   +42 more
openaire   +1 more source

Observational studies

1986
openaire   +1 more source
humans
3. good health
research design
bias
observational studies as topic
cohort studies
causality
meta-analysis
case-control studies
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