Understanding Research Pyramid

From the bottom of the top: Quality of evidence increases and risk of bias decreases.From the top to bottom: Quality of evidence decreases and risk of bias increases. References: Yetley EA, MacFarlane AJ, Greene-Finestone LS, Garza C, Ard JD, Atkinson SA, Bier DM, Carriquiry AL, Harlan WR, Hattis D, King JC. Options for basing Dietary…

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