Abstract:
BACKGROUND:As the use of electronic health records (EHRs) becomes more widespread, so does the need to search and provide effective information discovery within them. Querying by keyword has emerged as one of the most effective paradigms for searching. Most work in this area is based on traditional Information Retrieval (IR) techniques, where each document is compared individually against the query. We compare the effectiveness of two fundamentally different techniques for keyword search of EHRs. METHODS:We built two ranking systems. The traditional BM25 system exploits the EHRs' content without regard to association among entities within. The Clinical ObjectRank (CO) system exploits the entities' associations in EHRs using an authority-flow algorithm to discover the most relevant entities. BM25 and CO were deployed on an EHR dataset of the cardiovascular division of Miami Children's Hospital. Using sequences of keywords as queries, sensitivity and specificity were measured by two physicians for a set of 11 queries related to congenital cardiac disease. RESULTS:Our pilot evaluation showed that CO outperforms BM25 in terms of sensitivity (65% vs. 38%) by 71% on average, while maintaining the specificity (64% vs. 61%). The evaluation was done by two physicians. CONCLUSIONS:Authority-flow techniques can greatly improve the detection of relevant information in EHRs and hence deserve further study.
journal_name
BMC Med Inform Decis Makjournal_title
BMC medical informatics and decision makingauthors
Hristidis V,Varadarajan RR,Biondich P,Weiner Mdoi
10.1186/1472-6947-10-64subject
Has Abstractpub_date
2010-10-22 00:00:00pages
64issn
1472-6947pii
1472-6947-10-64journal_volume
10pub_type
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