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Controlled vocabularies used to build the Cochrane vocabulary

The Linked Data team chose controlled vocabularies to build the Cochrane vocabulary with the following aims:

• Acceptable for use across Cochrane
• Structured in a way that allows them to be linked to other parts of the linked data universe
• Compatible with vocabularies already in use within Cochrane or by our close collaborators.

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The Cochrane vocabulary links to four different controlled vocabularies: MedDRA, SNOMED CT, RXNorm, and WHO ATC. Some of the controlled vocabularies are more relevant to specific sections of the PICO than others. One of them (SNOMED CT) is a very large and diverse vocabulary that includes many terms that are unlikely to be relevant to annotations. Therefore, only selected subsets of this vocabulary are included in the Cochrane vocabulary.

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For age and sex, MeSH ranges and headings are used.

Terms for the "Condition"  portion  portion of P are drawn from two standard vocabularies - MedDRA and SNOMED CT.   All of the terms from MedDRA are available for P annotation, but only selected subsets of SNOMED have been included.  If you find a term in SNOMED CT that you feel would be applicable for annotation of a Condition, but you cannot access the term in the P part of the PICO annotator, please request it via the Vocabulary Request form on your Review Group page.

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