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_Optional
descriptionA text description or summary of the variable
Optional
directnesslow | moderate | high | exact
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extensionAdditional content defined by implementations
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idUnique id for inter-element referencing
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intendedDefinition of the intended variable related to the Evidence
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modifierExtensions that cannot be ignored even if unrecognized
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noteFootnotes and/or explanatory notes
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observedDefinition of the actual variable related to the statistic(s)
population | subpopulation | exposure | referenceExposure | measuredVariable | confounder
A text description or summary of the variable