Clinical laboratories collaborate to resolve differences in variant interpretations submitted to ClinVar
Open accessAbstract
Purpose Data sharing through ClinVar offers a unique opportunity to identify interpretation differences between laboratories. As part of a ClinGen initiative, four clinical laboratories (Ambry, GeneDx, Partners Healthcare Laboratory for Molecular Medicine, and University of Chicago Genetic Services Laboratory) collaborated to identify the basis of interpretation differences and to investigate if data sharing and reassessment resolve interpretation differences by analyzing a subset of variants. Methods ClinVar variants with submissions from at least two of the four participating laboratories were compared. For a subset of identified differences, laboratories documented the basis for discordance, shared internal data, independently reassessed with the American College of Medical Genetics and Genomics-Association for Molecular Pathology (ACMG-AMP) guidelines, and then compared interpretations. Results At least two of the participating laboratories interpreted 6,169 variants in ClinVar, of which 88.3% were initially concordant. Laboratories reassessed 242/724 initially discordant variants, of which 87.2% (211) were resolved by reassessment with current criteria and/or internal data sharing; 12.8% (31) of reassessed variants remained discordant owing to differences in the application of the ACMG-AMP guidelines. Conclusion Participating laboratories increased their overall concordance from 88.3 to 91.7%, indicating that sharing variant interpretations in ClinVar-thereby allowing identification of differences and motivation to resolve those differences-is critical to moving toward more consistent variant interpretations.Genet Med advance online publication 09 March 2017.
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Accepted standards for concordance do not exist, and variability among laboratories has been observed.
“Accepted standards for concordance do not exist, and variability among laboratories has been observed.7”
From Calibration of computational tools for missense variant pathogenicity classification and ClinGen recommendations for PP3/BP4 criteria (2022) · cites this paper as [7]
The Results (Initial Concordance Data; page unavailable) report that 11.7% of shared variants had discordant interpretations, supporting observed variability among laboratories. The paper does not establish that accepted standards for concordance do not exist; it describes the criteria used for this project instead. (LLM, conf=0.84)
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“7 Finally, the design of several tools was motivated mainly by the discovery of novel variants and hypothesis generation for experimental follow-up, rather than clinical pathogenicity clas-sification.”
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- Authors
- Harrison, S. M., Dolinsky, J. S., Knight Johnson, A. E., Pesaran, T., Azzariti, D. R., Bale, S., Chao, E. C., Das, S., Vincent, L., & Rehm, H. L.
- Affiliations
- Harvard University (US)
- Ambry Genetics (United States) (US)
- University of California, Irvine (US)
- University of Chicago (US)
- Broad Institute (US)
- Corresponding author
- Harrison, Steven M.
- ORCID
- Venue
- Genetics in Medicine
- Publisher
- Elsevier BV
- Published
- 2017-10
- Volume
- 19
- Issue
- 10
- Pages
- 1096-1104
- ISSN
- 1098-3600 (ISSN-L)
- PMC
- PMC5600649
- OpenAlex
- W2595455619
- Cited by
- 234
- References
- 18
- Citations by year
- 2026: 17 · 2025: 14 · 2024: 19 · 2023: 16 · 2022: 22 · 2021: 29 · 2020: 21 · 2019: 33 · 2018: 44 · 2017: 18 · 2016: 1
- FWCI
- 20.56
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Genetics in Medicine (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
- Funders
- National Human Genome Research Institute (U41HG006834)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
- Health Sciences › Medicine › Physiology › Clinical Laboratory Practices and Quality Control
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Connective tissue disorders research
- Keywords
- ClinVar, variant interpretation, data sharing, ACMG/AMP guidelines, clinical laboratory, concordance, ClinGen
- MeSH terms
- Clinical Laboratory Information Systems, Genetic Testing, Humans, Laboratories, Software, Genetic Variation, Genome, Human, Clinical Laboratory Techniques, Genomics, Databases, Genetic, Information Dissemination, High-Throughput Nucleotide Sequencing
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