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> I have just noticed a problem when exploding MeSH terms when searching > Medline on Webspirs. Has anyone else has had a similar problem? Does > anyone have any explanations, maybe we are making a mistake here? > > #1 explode 'Surgical-Procedures-Operative' / all subheadings in > MIME,MJME 398,017 records > #2 explode 'Digestive-System-Surgical-Procedures' / all subheadings > in MIME,MJME 54,869 records > #3 #1 and #2 > 51,370 records > #4 explode 'Endocrine-Surgical-Procedures' / all subheadings in > MIME,MJME 17,644 records > #5 #1 and #4 > 16,601 records > > Both #2 and #4 are narrower terms of Surgical Procedures, Operative. > I searched on databases from 1993 onwards, the problem does not appear > to be specific to one disk i.e. I tried searching on the most recent > disk 2001 up to October and searching without using this disk and came > up with the same problem. There are no limits set on these searches. > > When I try this on PubMed or Ovid the same number of records are > retrieved as expected. (i.e. combining Surgical Procedures, Operative > with narrower terms produces the same number of records as searching > on the narrower term alone.) > > Carlos Sharpin > Library > Royal College of Surgeons of England > 35-43 Lincoln's Inn Fields > London WC2A 3PE > T: 020 7869 6550 > F: 020 7405 4438 > E: [log in to unmask] >