MedicalTrialDesign

MedicalTrialDesign is a 9-value MedicalEnumeration on MedicalTrial.trialDesign. Arrays are common — a trial can be both RandomizedTrial and DoubleBlindedTrial and MultiCenterTrial simultaneously.

Values: RandomizedTrial, DoubleBlindedTrial, SingleBlindedTrial, TripleBlindedTrial, OpenTrial, PlaceboControlledTrial, SingleCenterTrial, MultiCenterTrial, InternationalTrial.

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

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

schema.org/MedicalTrialDesign

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "MedicalTrial",
  "name": "Dunmore Paediatric Cohort 2026",
  "trialDesign": [
    "https://schema.org/RandomizedTrial",
    "https://schema.org/DoubleBlindedTrial",
    "https://schema.org/MultiCenterTrial"
  ]
}
</script>

Minimal valid version

The smallest markup that still produces a valid MedicalTrialDesign 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/MedicalTrialDesign (minimal)

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "MedicalTrial",
  "trialDesign": "https://schema.org/RandomizedTrial"
}
</script>

Google rich results this unlocks

MedicalTrialDesign 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). MedicalTrialDesign becomes the trunk that the primary type branches off viamainEntityorbreadcrumb. Include it on every page as the backbone of your markup.

Common MedicalTrialDesign 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.

Single trialDesign when multiple apply

Wrong

"trialDesign": "https://schema.org/RandomizedTrial" alone for a randomized double-blind multi-centre trial

Right

Array of all applicable design URIs

Trial designs stack — randomised, blinded, multi-centre are independent axes.

Schema properties in this example

MedicalTrialDesign MedicalEnumeration trialDesign RandomizedTrial DoubleBlindedTrial SingleBlindedTrial TripleBlindedTrial OpenTrial PlaceboControlledTrial SingleCenterTrial MultiCenterTrial InternationalTrial

Also mentioned in 1 other example

MedicalTrialDesign also appears in MedicalTrial. See the full MedicalTrialDesign schema page for every reference.

About the example data

Labels trial-design entries in the Dunmore Archive's clinical-registry excerpts.

Comments

Loading comments...