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Nursing: Evidence Pyramid Module

Scroll down to see Video 2: The Hierarchy of evidence

Video 1: understanding the combined evidence pyramid

Video 2: Heirarchy of evidence

Watch this video to learn about the hierarchical organization of clinical research evidence.

Click to select a type of evidence

Systems is the top level of the 6s pyramid. Example: evidence-based clinical information system. This level of the pyramid is grey on the image being described.
Summaries are the second level from the top of the 6s pyramid. Examples: practice guideline, evidence summary. This level of the pyramid is yellow on the image being described.
Synopses of syntheses are the third level from the top of the 6s pyramid. Example: pre-appraised systematic review. This level of the pyramid is pale red on the image being described.
Syntheses are the fourth level from the top of the 6s pyramid. Example: systematic review. This level of the pyramid is pink on the image being described.
Synopses of single studies are the second level from the bottom of the 6s pyramid. Example: pre-appraised single study. This level of the pyramid is blue on the image being described.
Single studies is the bottom level of the 6s pyramid. Example: randommized controlled trial, cohort study. This level of the pyramid is green on the image being described.

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