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MedicalEvidenceLevel

MedicalEvidenceLevel is a 3-value MedicalEnumeration on MedicalGuideline.evidenceLevel. Values: EvidenceLevelA (strongest — multiple RCTs or meta-analyses), EvidenceLevelB (single RCT or large observational), EvidenceLevelC (expert consensus or small case series).

Full example of schema.org/MedicalEvidenceLevel json-ld markup

The markup is verified as valid with Rich Results Test from Google.

schema.org/MedicalEvidenceLevel
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "MedicalGuidelineRecommendation",
  "name": "Supervised cardiac rehabilitation after MI",
  "evidenceLevel": "https://schema.org/EvidenceLevelA"
}
</script>

Minimal valid version

The smallest markup that still produces a valid MedicalEvidenceLevel entity. Use it as the floor. Reach for the advanced example above when you want search engines and AI agents to understand more about your content.

schema.org/MedicalEvidenceLevel (minimal)
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "MedicalGuideline",
  "evidenceLevel": "https://schema.org/EvidenceLevelA"
}
</script>

Google rich results this unlocks

MedicalEvidenceLevel is a structural type. It does not produce a rich result on its own.

Its value comes from combining it with a primary type whose markup earns a rich result (Article, Product, Event, and so on). MedicalEvidenceLevel becomes the trunk that the primary type branches off viamainEntityorbreadcrumb. Include it on every page as the backbone of your markup.

Common MedicalEvidenceLevel mistakes

Mistakes that pass validation but silently fail to earn rich results or mislead consumers walking the graph. Avoid these and your markup will be ahead of most sites in the wild.

  1. 01

    evidenceLevel as 'A'

    Wrong
    "evidenceLevel": "A"
    Right
    "evidenceLevel": "https://schema.org/EvidenceLevelA"

    Three URI closed set.

Schema properties in this example

MedicalEvidenceLevelMedicalEnumerationevidenceLevelEvidenceLevelAEvidenceLevelBEvidenceLevelCMedicalGuideline

Also mentioned in 1 other example

MedicalEvidenceLevel also appears in MedicalGuideline. See the full MedicalEvidenceLevel schema page for every reference.

About the example data

"EvidenceLevelA" on cardiac-rehabilitation guideline citations in the Dunmore Archive.

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