title: Taming Big Data: An Information Extraction Strategy for Large Clinical Text Corpora.
abstract: Concepts of interest for clinical and research purposes are not uniformly distributed in clinical text available in electronic medical records. The purpose of our study was to identify filtering techniques to select 'high yield' documents for increased efficacy and throughput. Using two large corpora of clinical text, we demonstrate the identification of 'high yield' document sets in two unrelated domains: homelessness and indwelling urinary catheters. For homelessness, the high yield set includes homeless program and social work notes. For urinary catheters, concepts were more prevalent in notes from hospitalized patients; nursing notes accounted for a majority of the high yield set. This filtering will enable customization and refining of information extraction pipelines to facilitate extraction of relevant concepts for clinical decision support and other uses.
authors.affiliation: VA Salt Lake City Health Care System and University of Utah, Salt Lake City, UT.
authors.forename: Adi V
authors.initials: AV
authors.lastname: Gundlapalli
authors.affiliation: VA Salt Lake City Health Care System and University of Utah, Salt Lake City, UT.
authors.forename: Guy
authors.initials: G
authors.lastname: Divita
authors.affiliation: VA Salt Lake City Health Care System and University of Utah, Salt Lake City, UT.
authors.forename: Marjorie E
authors.initials: ME
authors.lastname: Carter
authors.affiliation: VA Salt Lake City Health Care System and University of Utah, Salt Lake City, UT.
authors.forename: Andrew
authors.initials: A
authors.lastname: Redd
authors.affiliation: VA Salt Lake City Health Care System and University of Utah, Salt Lake City, UT.
authors.forename: Matthew H
authors.initials: MH
authors.lastname: Samore
authors.affiliation: VA Boston Health Care System and Boston University, Boston, MA.
authors.forename: Kalpana
authors.initials: K
authors.lastname: Gupta
authors.affiliation: VA Houston Health Care System and Baylor College of Medicine, Houston, TX.
authors.forename: Barbara
authors.initials: B
authors.lastname: Trautner
mesh_terms: D035843:Biomedical Research / Q000379:methods*; D057286:Electronic Health Records / Q000458:organization & administration*; D006703:Ill-Housed Persons; D006801:Humans; D016247:Information Storage and Retrieval / Q000379:methods*; D009323:Natural Language Processing; D062885:Urinary Catheters