In Medline Ovid, it is possible to define aspects relevant to the research question as part of the search strategy by using Limits. These are usually applied at the end of the search strategy.
There are two categories of Limits:
These are presented under two different links: Limits opens to a set of commonly used limits; and Additional Limits provides a greater selection of options.
Filters allow you to change the view of returned results to reduce the number of results displayed and increase their relevancy. Filters do not change the Search History or the number of results found.
Filters are found on the left hand side of the results display.