The more specific the topic is, the more relevant the results you will retrieve. Searching the phrase low back pain, not just pain, narrows the results.

Databases are indexes of primarily journals that allow you to search for specific articles based on the article title, article abstract, author(s), date of publication, and more. Once you've run a search using your keywords, review the article abstracts in your search results to determine if the article is appropriate to answer your research question. 

Each database varies so to make your search more effective, look within the database for tips or check out some of the options below for getting additional help through the library.