This document discusses evidence-based medicine and statistical significance. It defines evidence-based medicine as using current best evidence from sources like systematic reviews and meta-analyses to make decisions about patient care. The 5 A's process for practicing evidence-based medicine is outlined as asking questions, acquiring evidence, appraising evidence, applying to patients, and assessing outcomes. Different types of studies used in evidence-based medicine are described, including systematic reviews/meta-analyses, randomized controlled trials, cohort studies, and case-control studies.