Healthcare Data Analytics

Information Retrieval for H ealthcare 477

FIGURE 14.2: Portion of MeSH hierarchy for Cardiovascular Diseases. (Courtesy of NLM)

One of these is subheadings, which are qualifiers of subject headings that narrow the focus of a

term. In Hyp ertension, for example, the focu s of an article may be on the diagnosis, epide miology,

or treatment of the condition. Another feature of MeSH that helps retrieval is check tags. These

are MeSH terms that represent certain facets of medical studies, such as age, gender, human or

nonhuman, and type of grant support. Related to check tags are the geographical locations in the Z

tree. In dexers must also include these, ...