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Evaluating Drug Safety Using Graph Databases
1.
© 2022 Neo4j,
Inc. All rights reserved. Evaluating Drug Safety Using Graph Databases Zeshan Ghory Product Director
2.
© 2022 Neo4j,
Inc. All rights reserved. 2 How do we evaluate drug safety? • By the time drugs reach patients, they have been through extensive clinical trials and approved by the relevant national / regional regulator (e.g. FDA, EMA etc) • Even once drugs are approved and on the market, systems remain in place to flag up Adverse Events • Most regulators have their own spontaneous reporting systems for Adverse Event logging, the best known of which is the FAERS system run by the FDA 2
3.
© 2022 Neo4j,
Inc. All rights reserved. 3 If a drug has adverse events, should we be concerned? • Most drugs will have some entries in FAERS ◦ How do we know if there’s a potential problem? ◦ Typically use Odds Ratios to analyze the data BUT… • FAERS data exhibits bias, because only adverse events are recorded ◦ “Normal” drug use won’t show up here except incidentally SO… • We need to look at other “Real World Evidence” (RWE) ◦ Electronic health records, Insurance claims data etc 3 With Adverse Event Without Adverse Event With Drug a b Without Drug c d ROR = a/b c/d
4.
© 2022 Neo4j,
Inc. All rights reserved. 4 The coding conundrum – OHDSI and graphs to the rescue! • Each database encoded using different vocabularies for drugs and conditions • Fortunately the OHDSI initiative provides (many, but not all) mappings between many common vocabularies using the OMOP CDM
5.
© 2022 Neo4j,
Inc. All rights reserved. 5 Our Approach Drug Safety Profiles The ability to compare FAERS analysis to Real World Evidence FAERS RWE Graph (Neo4j) OHDSI
6.
© 2022 Neo4j,
Inc. All rights reserved. 6 Implementation • Developed a graph model for FAERS data and populated it in Neo4j • Loaded ontologies in to Neo4j • Linked FAERS to ontologies • RWE sitting in Hadoop cluster ◦ Didn’t make sense to move it in to Neo4j for what we needed ◦ Graph generates ICD10 (condition) and NDC (drug) codes corresponding to FAERS data which are passed to Spark to find matching RWE records ◦ All orchestrated via a Python app • Built React front-end to turn this in to a SaaS product which can run the calculations for any drug / adverse event combination 6
7.
© 2022 Neo4j,
Inc. All rights reserved. 7 Sample Output • For a given drug and date range as input ◦ Navigate adverse events by MedDRA hierarchy (showing HLT, but could start even higher up like SOC) ◦ Pick the specific adverse event of interest (MedDRA PT) • Output returns odds ratio calculations for both FAERS and the RWE data set (in this case insurance claims data) to allow a comparison • Having everything connected via the graph also allows us to do other interesting things ◦ Compare a drug’s safety profile to other drugs in the same class or the class as a whole (via the ontologies) ◦ Look at the safety profile of drugs used in combination Image Placeholder
8.
© 2022 Neo4j,
Inc. All rights reserved. 8 Q & A
9.
© 2022 Neo4j,
Inc. All rights reserved. 9 Thank you! Zeshan Ghory t: @zeshanghory e: zeshan.ghory@iqvia.com
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