Evidence Based Medicine databases, Current Contents, Health and Psychosocial Instruments, and Sociological Abstracts. The advantage of searching multiple databases at once is that you are able to remove duplicate articles from your search results. Ovid will also show you how many hits come from each database when you click the details button that appears in the search history window. 1. Search for synonyms. The disadvantage of searching multiple databases is that automatic mapping and use of controlled vocabularies is turned off.
All searches are textword searches of the title and abstracts of the articles.
This means that you need to think of and enter any appropriate synonyms or alternate terms to include in your search. You need to think of all the forms of neoplasms that are appropriate for your question and enter them. Using truncation can impact your results significantly. It provides access to information for clinical trials on a wide range of conditions and diseases. The site currently contains over 4000 clinical trials, sponsored mostly by the National Institutes of Health.