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EMTREE, the Life Science Thesaurus of Elsevier already contained a significant number of indexing terms relating to applied health and other nursing related fields. However, more specific nursing indexing terms were required to bolster this functionality.
A team of specialists from the Nursing publishing group of Elsevier joined forces with the indexing people working behind EMTREE. As a result of their efforts, EMTREE was extended with nearly 1,500 new terms, applicable to nursing-related literature. Some EMTREE branches were extended and more pre-coordinated terms were added to allow an unambiguous indexing of terms.
To be able to execute specific nursing indexing for the journals in EMCare, synonyms were also transposed to create new indexing terms. For example former synonyms of 'nursing', such as 'emergency nursing' and 'geriatric nursing', were relocated as preferred terms under the new category: 'nursing discipline'.
Our tests on a sample of 10,000 nursing oriented journal articles showed that this extension resulted in an increase of 866 indexed terms compared to EMTREE 2005. At the same time results showed a shift from indexing of more general terms to the indexing of pre-coordinated terms.
Special attention was paid to terms used in evidence-based medicine, including a new category of ''named inventories, questionnaires and rating scales' and extension of statistical concepts.
If you have any further queries relating to thesaurus functionality please contact EMCare@elsevier.com.
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