Addressing Challenges In Genetic Test Evaluation

Genetic testing is a rapidly expanding area with many clinical applications. While the introduction of new genetic tests creates tremendous potential for improving patient care, it is essential to evaluate these tests thoroughly to ensure that they are accurate and lead to improved patient outcomes when used in clinical practice settings. While the general principles for evaluating genetic tests are similar to those for evaluating other clinical tests, there are differences in how the principles are applied and the degree to which certain issues are relevant. The context for genetic testing is often more complex than that of other clinical tests. Evaluating the clinical impact of genetic tests under a broad range of clinical scenarios, particularly when the evaluation involves heritable conditions, requires use of appropriate frameworks. To date, systematic reviewers have not been consistent in their approaches to evaluating genetic tests. Clarifying a set of analytic frameworks customized for different testing scenarios but sharing the same principles could be beneficial to the practice of genetic testing evaluation. Another challenge in evaluating genetic tests is the assessment of analytic validity. Analytic validity refers to the ability of a laboratory test to accurately and reliably measure the properties or characteristics it is intended to measure (e.g., the presence of a gene mutation). Evaluation of a genetic test's analytic validity is often required as part of the effort to establish the aforementioned “chain of evidence.” The paucity of published data and a lack of an optimized search strategy for identifying data on analytic validity from gray literature remain a major barrier to evaluating analytic validity of genetic tests. Meanwhile, there is a lack of established quality assessment guidance for assessing analytic validity studies when they are identified. To address these important issues related to genetic test evaluation, the Agency for Healthcare Research and Quality commissioned this report. The report addressed the following four Key Questions: Key Question 1: Is it feasible to clarify a comprehensive framework or a limited set of frameworks for evaluating genetic tests by modifying existing frameworks? Key Question 2: What are the strengths and limitations of different approaches to literature searching to assess evidence on variability in genetic and laboratory testing? Is there an optimal approach to literature search? Key Question 3: Is it feasible to apply existing quality rating criteria to analytic validity studies on genetic tests? Is there an optimal quality rating instrument for these studies? Key Question 4: What are existing gaps in evidence on sources and contributors of variability common to all genetic tests, or to specific categories of genetic tests? What approaches will lead to generating data to fill these gaps? These four key questions fall into two categories that are intrinsically connected but different in scope: evaluation frameworks and analytic validity

Advances in genetics and genomics are transforming medical practice, resulting in a dramatic growth of genetic testing in the health care system. The rapid development of new technologies, however, has also brought challenges, including the need for rigorous evaluation of the validity and utility of genetic tests, questions regarding the best ways to incorporate them into medical practice, and how to weigh their cost against potential short- and long-term benefits. As the availability of genetic tests increases so do concerns about the achievement of meaningful improvements in clinical outcomes, costs of testing, and the potential for accentuating medical care inequality. Given the rapid pace in the development of genetic tests and new testing technologies, An Evidence Framework for Genetic Testing seeks to advance the development of an adequate evidence base for genetic tests to improve patient care and treatment. Additionally, this report recommends a framework for decision-making regarding the use of genetic tests in clinical care.

Raising hopes for disease treatment and prevention, but also the specter of discrimination and "designer genes," genetic testing is potentially one of the most socially explosive developments of our time. This book presents a current assessment of this rapidly evolving field, offering principles for actions and research and recommendations on key issues in genetic testing and screening. Advantages of early genetic knowledge are balanced with issues associated with such knowledge: availability of treatment, privacy and discrimination, personal decision-making, public health objectives, cost, and more. Among the important issues covered: Quality control in genetic testing. Appropriate roles for public agencies, private health practitioners, and laboratories. Value-neutral education and counseling for persons considering testing. Use of test results in insurance, employment, and other settings.

Advances in genetics and genomics are transforming medical practice, resulting in a dramatic growth of genetic testing in the health care system. The rapid development of new technologies, however, has also brought challenges, including the need for rigorous evaluation of the validity and utility of genetic tests, questions regarding the best ways to incorporate them into medical practice, and how to weigh their cost against potential short- and long-term benefits. As the availability of genetic tests increases so do concerns about the achievement of meaningful improvements in clinical outcomes, costs of testing, and the potential for accentuating medical care inequality. Given the rapid pace in the development of genetic tests and new testing technologies, An Evidence Framework for Genetic Testing seeks to advance the development of an adequate evidence base for genetic tests to improve patient care and treatment. Additionally, this report recommends a framework for decision-making regarding the use of genetic tests in clinical care.

Consumer genomics, encompassing both direct-to-consumer applications (i.e., genetic testing that is accessed by a consumer directly from a commercial company apart from a health care provider) and consumer-driven genetic testing (i.e., genetic testing ordered by a health care provider in response to an informed patient request), has evolved considerably over the past decade, moving from more personal utility-focused applications outside of traditional health care to interfacing with clinical care in nontraditional ways. As consumer genomics has increasingly intersected with clinical applications, discussions have arisen around the need to demonstrate clinical and analytical validity and clinical utility due to the potential for misinterpretation by consumers. Clinical readiness and interest for this information have presented educational and training challenges for providers. At the same time, consumer genomics has emerged as a potentially innovative mechanism for thinking about health literacy and engaging participants in their health and health care. To explore the current landscape of consumer genomics and the implications for how genetic test information is used or may be used in research and clinical care, the Roundtable on Genomics and Precision Health of the National Academies of Sciences, Engineering, and Medicine hosted a public workshop on October 29, 2019, in Washington, DC. Discussions included such topics as the diversity of participant populations, the impact of consumer genomics on health literacy and engagement, knowledge gaps related to the use of consumer genomics in clinical care, and regulatory and health policy issues such as data privacy and security. A broad array of stakeholders took part in the workshop, including genomics and consumer genomics experts, epidemiologists, health disparities researchers, clinicians, users of consumer genomics research applications, representatives from patient advocacy groups, payers, bioethicists, regulators, and policy makers. This publication summarizes the presentations and discussion of the workshop.

Progress and Challenges in Precision Medicine presents an insightful overview to the myriad factors of personalized and precision medicine. The availability of the human genome, large amounts of data on individual genetic variations, environmental interactions, influence of lifestyle, and cutting-edge tools and technologies for big-data analysis have led to the age of personalized and precision medicine. Bringing together a global range of experts on precision medicine, this book collects previously scattered information into one concise volume which covers the most important developments so far in precision medicine and also suggests the most likely avenues for future development. The book includes clinical information, informatics, public policy implications, and information on case studies. It is a useful reference and background work for students, researchers, and clinicians working in the biomedical and medical fields, as well as policymakers in the health sciences. Provides an overview of the growing field of precision medicine Contains chapters from geographically diverse experts in their field Explores important aspects of precision medicine, including applications, ethics, and development

Handbook of Clinical Adult Genetics and Genomics: A Practice-Based Approach provides a thorough overview of genetic disorders that are commonly encountered in adult populations and supports the full translation of adult genetic and genomic modalities into clinical practice. Expert chapter authors supplement foundational knowledge with case-based strategies for the evaluation and management of genetic disorders in each organ system and specialty area. Topics discussed include employing genetic testing technologies, reporting test results, genetic counseling for adult patients, medical genetics referrals, issues of complex inheritance, gene therapy, and diagnostic and treatment criteria for developmental, cardiovascular, gastrointestinal, neuropsychiatric, pulmonary issues, and much more. Employs clinical case studies to demonstrate how to evaluate, diagnosis and treat adult patients with genetic disorders Offers a practical framework for establishing an adult genetics clinic, addressing infrastructure, billing, counseling, and challenges unique to adult clinical genetics Features chapter contributions from authors at leading adult genetics institutions in the US and abroad

Clinical Genome Sequencing: Psychological Aspects thoroughly details key psychological factors to consider while implementing genome sequencing in clinical practice, taking into account the subtleties of genetic risk assessment, patient consent and best practices for sharing genomic findings. Chapter contributions from leading international researchers and practitioners cover topics ranging from the current state of genomic testing, to patient consent, patient responses to sequencing data, common uncertainties, direct-to-consumer genomics, the role of genome sequencing in precision medicine, genetic counseling and genome sequencing, genome sequencing in pediatrics, genome sequencing in prenatal testing, and ethical issues in genome sequencing. Applied clinical case studies support concept illustration, making this an invaluable, practical reference for this important and multifaceted topic area within genomic medicine.