MeSH Term Trends in Pathology, a PubMED Survey of Articles in Pathology Journals
Serdar Balci, Bunyamin Dursun, Tansel Ozyer. Yildirim Beyazit University Ataturk Hospital, Ankara, Turkey; TUBITAK, Ankara, Turkey; TOBB University, Ankara, Turkey
Background: Medical Subject Headings are tagged for each journal article in NCBI database. We wanted to use MeSH terms to observe the alterations in research topics of pathology.
Design: 76 journals whose subject category were pathology in ISI Web of Knowledge Journal Citation Reports 2010 were included. ISSN numbers of these journals were used to download 223787 articles from PubMED in MEDLINE format. 2011 MeSH tree, journal and article properties in MEDLINE format were imported into Oracle database. Number of articles for each term was determined mimicking PubMED's explode function. To correct the numbers in regard to the increase in the publication numbers, term number was divided by article number to define a percentage. These percentages were used to compare the ratio between the last two 5-year-periods and named percent ratio.
Results: Although pathology journal articles constituted 1% of more than 21 million articles in PubMED, they covered 72.6% of total MeSH terms (26140). Last two 5-year were used to determine the recent changes in research fields; where >110% ratio was accepted as increase, <90% was decreased, others as relatively stable. In example, articles tagged with Molecular Diagnostic Techniques, Forensic Pathology, Surgical Pathology, Digestive System Neoplasms and Urogenital Neoplasms were increased whereas Immunohistochemistry and Telepathology were decreased.
|# articles 2001-2005||# articles 2006-2010||Percent ratio|
|Molecular Diagnostic Techniques||71||274||331|
|Pathology Department, Hospital||25||28||96|
|Digestive System Neoplasms||2581||3660||122|
|Head and Neck Neoplasms||2039||2278||96|
|Nervous System Neoplasms||1355||1463||93|
|Soft Tissue Neoplasms||619||561||78|
|# increased terms||# decreased terms||# stable terms|
|Terms introduced after 2000||828||808||81|
|Terms introduced before 2000||3878||6274||1304|