Template:Research design and evidence

醫學證據的等級區分有幾種不同的方式,不過其共同點都是將綜述(Meta- Analysis Systematic Reviews)及臨床醫學實務性指南(Clinical Practice Guidelines)視為最高等級的證據。

Animal and laboratory studies = 動物和實驗室研究
No humans involved = 無人類被實驗)
Case Report or Case Series Narrative Reviews, Expert Opinions, Editorials. = 個案報告、個案之一系列的訪談回顧、專家意見、社論、社評。
No design = 沒有經過設計)
Case Control Studies: Retrospective: Subject already of interest looking for risk factors =
Primary Studies = 第一手的研究。

參見:醫學試驗研究設計和證據-Capho(Research_design_and_evidence_-_Capho)
醫學原則:Wikipedia:可靠來源_(醫學)