TY - GEN
T1 - Time-dependent migration of citations through PubMed and OvidSP subsets
T2 - 14th World Congress on Medical and Health Informatics, MEDINFO 2013
AU - Boeker, Martin
AU - Vach, Werner
AU - Motschall, Edith
PY - 2013
Y1 - 2013
N2 - OBJECTIVE: To quantitatively describe (1) differences between search results derived at consecutive time points with the PubMed and OvidSP literature search interfaces over a five day interval, and (2) the migration of citations through different subsets to estimate the timeliness of OvidSP. METHODS: PubMed-Identifiers (PMIDs) of the following subsets were retrieved from PubMed and OvidSP simultaneously (within 8 h) at 11 days in March and April 2010 including 5 consecutive days: as supplied by publisher, in process, PubMed not MEDLINE, and OLDMEDLINE. Search results were compared for difference and intersection sets. The migration of citations on individual level was determined by comparison of corresponding sets over several days. RESULTS: The 'in process' set was stable with about 446,000-452,000 citations; a small fraction of up to 3 % of the total subsets were in PubMed only and OvidSP only subsets. About 96 % of the ca. 10,500 citations in the OvidSP only subset migrated within 2 days out of the 'in process' subset. The database of OvidSP is updated within a period of two days.
AB - OBJECTIVE: To quantitatively describe (1) differences between search results derived at consecutive time points with the PubMed and OvidSP literature search interfaces over a five day interval, and (2) the migration of citations through different subsets to estimate the timeliness of OvidSP. METHODS: PubMed-Identifiers (PMIDs) of the following subsets were retrieved from PubMed and OvidSP simultaneously (within 8 h) at 11 days in March and April 2010 including 5 consecutive days: as supplied by publisher, in process, PubMed not MEDLINE, and OLDMEDLINE. Search results were compared for difference and intersection sets. The migration of citations on individual level was determined by comparison of corresponding sets over several days. RESULTS: The 'in process' set was stable with about 446,000-452,000 citations; a small fraction of up to 3 % of the total subsets were in PubMed only and OvidSP only subsets. About 96 % of the ca. 10,500 citations in the OvidSP only subset migrated within 2 days out of the 'in process' subset. The database of OvidSP is updated within a period of two days.
KW - Literature Retrieval
KW - MEDLINE
KW - OvidSP search interface OvidSP segments
KW - PubMed search interface
KW - PubMed subsets
UR - http://www.scopus.com/inward/record.url?scp=84894378170&partnerID=8YFLogxK
U2 - 10.3233/978-1-61499-289-9-1196
DO - 10.3233/978-1-61499-289-9-1196
M3 - Conference contribution
C2 - 23920970
AN - SCOPUS:84894378170
SN - 9781614992882
T3 - Studies in Health Technology and Informatics
SP - 1196
BT - MEDINFO 2013 - Proceedings of the 14th World Congress on Medical and Health Informatics
PB - IOS Press
Y2 - 20 August 2013 through 23 August 2013
ER -