The following links provide information on defining and identifying types of medical research studies (also referred to as levels of evidence):
Study Design 101
Centre for Evidence Based Medicine (CEBM) - Levels of Evidence
Understanding Research Study Designs - University of Minnesota Bio-Medical Library
Article: Using Meta-analyses for Comparative Effectiveness Research
with permission from: http://mesacc.libguides.com/content.php?pid=549563&sid=4526523
The following links provide additional information and explanation of EBM:
UIC University Library - Evidence Based Medicine
Duke University - Introduction to Evidence Based Practice
Analysis of data from a number of independent studies of the same subject in order to determine overall trends and statistical significance.
Example Meta-analysis Article
An exhaustive and comprehensive review of research and studies (clinical trials) on a particular health related topic. All relevant results are combined and summarized into one published review.
View Example Systematic Review Article
(RCT) is a scientific study that randomly assigns participants into a control group to determine whether a cause-effect relationship exists between treatment and outcome.
View Example RCT Article
A longitudinal study where patients (participants) with a similar health condition are followed over time and compared with another group of patients not affected by the same condition.
View Example Cohort Study Article
Observing and collecting data from an entire population at a defined time. Results may be used to describe features of a population, prevalence of a health condition or cause and effect of a particular disease.
View Example Cross-Sectional Study
A Case Study is an article that documents an individual case (patient) condition. It is generally used to identify new trends or unexplained conditions or diseases.
View Example Case Study