Hello,
For the systematic review I performed a search using the same strategy on both Pubmed and Embase.
I was expecting that Embase would yield more articles.
However I got almost double through Pubmed.
Does this usually happen?
I am afraid that I might be something wrong, hence the low number.
Yes, it is possible to retrieve fewer articles on EMBASE compared to PubMed using the same search strategy. This is because EMBASE and PubMed have different coverage and indexing practices.
EMBASE is a biomedical and pharmaceutical database that covers literature from 1947 to the present. It includes over 32 million records from more than 8,500 journals, as well as books, conference proceedings, and patents. EMBASE uses a controlled vocabulary, called EMTree, to index its records.
PubMed is a bibliographic database that covers biomedical literature from MEDLINE, which is a subset of the U.S. National Library of Medicine's (NLM) bibliographic database. PubMed includes over 30 million records from over 5,600 biomedical journals. PubMed uses a combination of controlled vocabulary and keywords to index its records.
Differences in coverage
EMBASE covers a wider range of literature than PubMed, including literature from Europe, Asia, and Latin America. PubMed is more focused on literature from North America and the United Kingdom.
Differences in indexing
EMBASE uses a more controlled vocabulary than PubMed. This means that EMBASE records are indexed with more specific terms, which can make it more difficult to find relevant articles.
As a result of these differences, it is possible to retrieve fewer articles on EMBASE compared to PubMed using the same search strategy.
Thank you very much for your explanation! that is very helpful Pradeep Paul George
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