acquiring and representing drug-drug interaction knowledge and evidence, eresearch roundtable at...
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Acquiring and representing drug-drug interaction
knowledge and evidence Jodi Schneider
eResearch Roundtable, GSLIS, UIUC2016-04-06
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Prescribers check for known drug interactions.
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Prescribers consult drug compendia which are maintained by expert pharmacists.
Medscape EpocratesMicromedex 2.0
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Prescribers consult drug compendia which are maintained by expert pharmacists.
Medscape EpocratesMicromedex 2.0
Significant discrepancies on drug interactions!
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Problem
o Thousands of preventable medication errors occur each year.
o Clinicians rely on information in drug compendia (Physician’s Desk Reference, Medscape, Micromedex, Epocrates, …).
o Compendia have information quality problems:• differ significantly in their coverage, accuracy, and
agreement• often fail to provide essential management
recommendations about prescription drugs
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Problem
o Drug compendia synthesize drug interaction evidence into knowledge claims but:• Disagree on whether specific evidence items can
support or refute particular knowledge claims
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Problem
o Drug compendia synthesize drug interaction evidence into knowledge claims but:• Disagree on whether specific evidence items can
support or refute particular knowledge claims• May fail to include important evidence
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Silos: Multiple sources of information
Post-market studies
Reported in
Scientific literature
Reported in
Pre-market studies Clinical experience
Drug product labels (US Food and Drug
Administration)
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Goals
o Long-term, provide drug compendia editors with better information and better tools, to create the information clinicians use.
o This talk focuses on how we might efficiently acquire and represent • knowledge claims about medication safety• and their supporting evidence
o In a standard computable format.
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MEDICATION SAFETY DOMAIN
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Definitions
o Drug-drug interaction• A biological process that results in a clinically
meaningful change to the response of at least one co-administrated drug.
o Potential drug-drug interaction• POSSIBILITY of a drug-drug interaction• Data from a clinical/physiological study OR
reasonable extrapolation about drug-drug interaction mechanisms
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Existing approaches: RepresentationBradford-Hill criteria (1965)
1. Strength2. Consistency3. Specificity4. Temporality5. Biological gradient6. Plausibility7. Coherence
Bradford-Hill A. The Environment and Disease: Association or Causation?. Proc R Soc Med. 1965;58:295-300.
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Existing approaches: Representation
Horn, J. R., Hansten, P. D., & Chan, L. N. (2007). Proposal for a new tool to evaluate drug interaction cases. Annals of Pharmacotherapy, 41(4), 674-680.
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Existing approaches: RepresentationRoyal Dutch Association for the Advancement of Pharmacy (2005)
1. Existence & quality of evidence on the interaction2. Clinical relevance of the potential adverse
reaction resulting from the interaction3. Risk factors identifying patient, medication or
disease characteristics for which the interaction is of special importance
4. The incidence of the adverse reaction
Van Roon, E.N. et al: Clinical relevance of drug-drug interactions: a structured assessment procedure. Drug Saf. 2005;28(12):1131-9.
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Existing approaches: Representation
Boyce, DIKB, 2006-present 15
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Existing approaches: Acquisition
o Evidence
16Boyce, DIKB, circa 2006
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DATA MODEL: REPESENTING KNOWLEDGE
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Why is a new data model needed?o Need computer integrationo Want a COMPUTABLE model that can make
inferences
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Multiple layers of evidence
Medication Safety Studies
Layer
Clinical Studies and Experiments
Scientific Evidence Layer
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Scientific Evidence Layer: Micropublications
20Clark, Ciccarese, Goble (2014) Micropublications: a semantic model for claims, evidence, arguments and annotations in biomedical communications
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MP:Claim
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Building up an MP graph
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Building up an MP graph
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Building up an MP graph
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Building up an MP graph
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Building up an MP graph
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Building up an MP graph
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Building up an MP graph
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Building up an MP graph
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Building up an MP graph
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Medication Safety Studies Layer: DIDEO
Brochhausen et al, work in progress, example of Clinical Trial
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DIDEO: Drug-drug Interaction and Drug-drug Interaction Evidence Ontology
33https://github.com/DIDEO
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EVIDENCE CURATION: ACQUIRING KNOWLEDGE
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Hand-extracting knowledge claims and evidence
o Sources• Primary research literature• Case reports• FDA-approved drug labels
o Process• Spreadsheets• PDF annotation
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DIRECTIONS & FUTURE WORK
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We are developing a search/retrieval portal It will:o Integrate information (removing silos)o Offer the same information to all compendium
editorso Provide direct access to information
• E.g. quotes in context
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Quotes in context!
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Evaluation plan for the search/retrieval portalo 20-person user studyo Measures of
• Completeness of information• Level of agreement• Time required• Perceived ease of use
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Implications for evidence modeling & curationo Evidence modeling & curation is a general
process.o Analogous processes could be used in other
fields.o Biomedical curation is most mature:
structured nature of the evidence interpretation, existing ontologies, trained curators, information extraction and natural language processing pipelines
o Curation pipelines need to be designed with stakeholders in mind.
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Other Implications
o Implications for ontology development.o Implications for improving medication safety.
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Thanks to collaborators & funderso Training grant T15LM007059 from the
National Library of Medicine and the National Institute of Dental and Craniofacial Research
o The entire “Addressing gaps in clinically useful evidence on drug-drug interactions” team from U.S. National Library of Medicine R01 grant (PI, Richard Boyce; R01LM011838) and other collaborators
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“Addressing gaps in clinically useful evidence on drug-drug interactions”
4-year project, U.S. National Library of Medicine R01 grant (PI, Richard Boyce; R01LM011838)o Evidence panel of domain experts: Carol
Collins, Amy Grizzle, Lisa Hines, John R Horn, Phil Empey, Dan Malone
o Informaticists: Jodi Schneider, Harry Hochheiser, Katrina Romagnoli, Samuel Rosko
o Ontologists: Mathias Brochhausen, Bill Hogano Programmers: Yifan Ning, Wen Zhang, Louisa
Zhang
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Jodi Schneider, Mathias Brochhausen, Samuel Rosko, Paolo Ciccarese, William R. Hogan, Daniel Malone, Yifan Ning, Tim Clark and Richard D. Boyce. “Formalizing knowledge and evidence about potential drug-drug interactions.” International Workshop on Biomedical Data Mining, Modeling, and Semantic Integration: A Promising Approach to Solving Unmet Medical Needs (BDM2I 2015) at ISWC 2015 Bethlehem, Pennsylvania, USA.
Jodi Schneider, Paolo Ciccarese, Tim Clark and Richard D. Boyce. “Using the Micropublications ontology and the Open Annotation Data Model to represent evidence within a drug-drug interaction knowledge base.” 4th Workshop on Linked Science 2014—Making Sense Out of Data (LISC2014) at ISWC 2014 Riva de Garda, Italy.
Mathias Brochhausen, Jodi Schneider, Daniel Malone, Philip E. Empey, William R. Hogan and Richard D. Boyce “Towards a foundational representation of potential drug-drug interaction knowledge.” First International Workshop on Drug Interaction Knowledge Representation (DIKR-2014) at the International Conference on Biomedical Ontologies (ICBO 2014) Houston, Texas, USA.
Richard D. Boyce, John Horn, Oktie Hassanzadeh, Anita de Waard, Jodi Schneider, Joanne S. Luciano, Majid Rastegar-Mojarad, Maria Liakata, “Dynamic Enhancement of Drug Product Labels to Support Drug Safety, Efficacy, and Effectiveness.” Journal of Biomedical Semantics. 4(5), 2013. doi:10.1186/2041-1480-4-5
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