How to convert a search between PubMed and Ovid

Have you ever tried to convert a search strategy from PubMed to Ovid or vice versa? It can be a real pain. The field codes in Ovid don’t always nicely match up with the tags in PubMed and it can be difficult to wrap your head around the auto-expode in PubMed vs manual explode in Ovid for indexing terms. Not to mention that there is some functionality that exists in Ovid but not PubMed (such as proximity operators) and in PubMed that doesn’t exist in Ovid (such as the supplementary concepts tag). Yikes!

Why would you want to convert a search strategy between the two, you ask? Don’t they have the same content?

  1. There is some content that is in PubMed but not Ovid MEDLINE. The NLM factsheet “MEDLINE, PubMed, and PMC (PubMed Central): How are they different?” gives an overview of PubMed’s unique content.
  2. You might want to use features that are available in both databases! Maybe you’re working on a strategy in Ovid MEDLINE, but realise partway through you’d really like to use one of the PubMed subject filters, for example.
  3. Sometimes, you might find a search filter or hedge, but it is written in the syntax of a different interface. Translating a strategy isn’t always easy or intuitive, so automated the process can reduce errors and save time.

Over the past few months, I’ve been working with a colleague to build a tool that automatically converts searches between the two interfaces, and we recently presented our work at the EAHIL/ICML conference in Dublin.

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EAHIL/ICML conference in Dublin

During the conference week, we had dozens of excellent conversations in person and on Twitter, and 138 unique website visitors! Thanks to everyone who provided feedback and suggestions for improvements. We are working hard to incorporate many of them over the coming months.

The tool is freely available at medlinetranspose.github.io. Please feel free to check it out and let us know how it works for you!

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