Evidence-Based Medicine is the integration of best research evidence with clinical expertise and patient values. (Sackett DL, Straus SE, Richardson WS, et al. Evidence-based medicine: how to practice and teach EBM. 2nd ed. Edinburgh: Churchill Livingstone, 2000.)
Unfiltered resources are primary sources that describe original research. Randomized controlled trials, cohort studies, case-controlled studies, and case series/reports are considered unfiltered information.
Filtered resources are secondary sources that summarize and analyze the available evidence. They evaluate the quality of individual studies and often provide recommendations for practice. Systematic reviews, critically-appraised topics, and critically-appraised individual articles are considered filtered information.
Below you'll find a list of places to find each type of information.