If you have saved a search strategy in PubMed using the My NCBI option, you soon will be able to modify the search terms to refine or refocus your query.  An example would be: Original saved search – colorectal cancer screening among African Americans – colorectal cancer AND screening AND African Americans.

You may want to refocus the search on a different population and can do so by making changes in the “Search terms” box, e.g. colorectal cancer AND screening AND Latinos.  You can then click on the “Test search terms” link to look at the results before saving the revised search strategy.  See a description of this upcoming enhancement to My NCBI in the NLM Technical Bulletin.