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Sacks DB, Arnold M, Bakris GL, Bruns DE, Horvath AR, Lernmark Å, Metzger BE, Nathan DM, Kirkman MS. Guidelines and Recommendations for Laboratory Analysis in the Diagnosis and Management of Diabetes Mellitus. Diabetes Care 2023; 46:e151-e199. [PMID: 37471273 PMCID: PMC10516260 DOI: 10.2337/dci23-0036] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 05/11/2023] [Indexed: 07/22/2023]
Abstract
BACKGROUND Numerous laboratory tests are used in the diagnosis and management of diabetes mellitus. The quality of the scientific evidence supporting the use of these assays varies substantially. APPROACH An expert committee compiled evidence-based recommendations for laboratory analysis in screening, diagnosis, or monitoring of diabetes. The overall quality of the evidence and the strength of the recommendations were evaluated. The draft consensus recommendations were evaluated by invited reviewers and presented for public comment. Suggestions were incorporated as deemed appropriate by the authors (see Acknowledgments). The guidelines were reviewed by the Evidence Based Laboratory Medicine Committee and the Board of Directors of the American Association for Clinical Chemistry and by the Professional Practice Committee of the American Diabetes Association. CONTENT Diabetes can be diagnosed by demonstrating increased concentrations of glucose in venous plasma or increased hemoglobin A1c (HbA1c) in the blood. Glycemic control is monitored by the people with diabetes measuring their own blood glucose with meters and/or with continuous interstitial glucose monitoring (CGM) devices and also by laboratory analysis of HbA1c. The potential roles of noninvasive glucose monitoring, genetic testing, and measurement of ketones, autoantibodies, urine albumin, insulin, proinsulin, and C-peptide are addressed. SUMMARY The guidelines provide specific recommendations based on published data or derived from expert consensus. Several analytes are found to have minimal clinical value at the present time, and measurement of them is not recommended.
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Affiliation(s)
- David B. Sacks
- Department of Laboratory Medicine, National Institutes of Health, Bethesda, MD
| | - Mark Arnold
- Department of Chemistry, University of Iowa, Iowa City, IA
| | - George L. Bakris
- Department of Medicine, American Heart Association Comprehensive Hypertension Center, Section of Endocrinology, Diabetes and Metabolism, University of Chicago Medicine, Chicago, IL
| | - David E. Bruns
- Department of Pathology, University of Virginia Medical School, Charlottesville, VA
| | - Andrea R. Horvath
- New South Wales Health Pathology Department of Chemical Pathology, Prince of Wales Hospital, Sydney, New South Wales, Australia
| | - Åke Lernmark
- Department of Clinical Sciences, Lund University/CRC, Skane University Hospital Malmö, Malmö, Sweden
| | - Boyd E. Metzger
- Division of Endocrinology, Northwestern University, The Feinberg School of Medicine, Chicago, IL
| | - David M. Nathan
- Massachusetts General Hospital Diabetes Center and Harvard Medical School, Boston, MA
| | - M. Sue Kirkman
- Department of Medicine, University of North Carolina, Chapel Hill, NC
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2
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Sacks DB, Arnold M, Bakris GL, Bruns DE, Horvath AR, Lernmark Å, Metzger BE, Nathan DM, Kirkman MS. Guidelines and Recommendations for Laboratory Analysis in the Diagnosis and Management of Diabetes Mellitus. Clin Chem 2023:hvad080. [PMID: 37473453 DOI: 10.1093/clinchem/hvad080] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 05/12/2023] [Indexed: 07/22/2023]
Abstract
BACKGROUND Numerous laboratory tests are used in the diagnosis and management of diabetes mellitus. The quality of the scientific evidence supporting the use of these assays varies substantially. APPROACH An expert committee compiled evidence-based recommendations for laboratory analysis in screening, diagnosis, or monitoring of diabetes. The overall quality of the evidence and the strength of the recommendations were evaluated. The draft consensus recommendations were evaluated by invited reviewers and presented for public comment. Suggestions were incorporated as deemed appropriate by the authors (see Acknowledgments). The guidelines were reviewed by the Evidence Based Laboratory Medicine Committee and the Board of Directors of the American Association of Clinical Chemistry and by the Professional Practice Committee of the American Diabetes Association. CONTENT Diabetes can be diagnosed by demonstrating increased concentrations of glucose in venous plasma or increased hemoglobin A1c (Hb A1c) in the blood. Glycemic control is monitored by the people with diabetes measuring their own blood glucose with meters and/or with continuous interstitial glucose monitoring (CGM) devices and also by laboratory analysis of Hb A1c. The potential roles of noninvasive glucose monitoring, genetic testing, and measurement of ketones, autoantibodies, urine albumin, insulin, proinsulin, and C-peptide are addressed. SUMMARY The guidelines provide specific recommendations based on published data or derived from expert consensus. Several analytes are found to have minimal clinical value at the present time, and measurement of them is not recommended.
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Affiliation(s)
- David B Sacks
- Department of Laboratory Medicine, National Institutes of Health, Bethesda, MD, United States
| | - Mark Arnold
- Department of Chemistry, University of Iowa, Iowa City, IA, United States
| | - George L Bakris
- Department of Medicine, American Heart Association Comprehensive Hypertension Center, Section of Endocrinology, Diabetes and Metabolism, University of Chicago Medicine, Chicago, ILUnited States
| | - David E Bruns
- Department of Pathology, University of Virginia Medical School, Charlottesville, VA, United States
| | - Andrea R Horvath
- New South Wales Health Pathology Department of Chemical Pathology, Prince of Wales Hospital, Sydney, NSW, Australia
| | - Åke Lernmark
- Department of Clinical Sciences, Lund University/CRC, Skane University Hospital Malmö, Malmö, Sweden
| | - Boyd E Metzger
- Division of Endocrinology, Northwestern University, The Feinberg School of Medicine, Chicago, IL, United States
| | - David M Nathan
- Massachusetts General Hospital Diabetes Center and Harvard Medical School, Boston, MA, United States
| | - M Sue Kirkman
- Department of Medicine, University of North Carolina, Chapel Hill, NC, United States
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Szilberhorn L, Zelei T, Vellekoop H, Huygens S, Versteegh M, Mölken MRV, Koleva-Kolarova R, Tsiachristas A, Wordsworth S, Nagy B. Cost-effectiveness and budget impact analysis of screening strategies for maturity-onset diabetes of the young in three European countries. Per Med 2023; 20:387-399. [PMID: 37665262 DOI: 10.2217/pme-2023-0017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Background: Correct diagnosis of maturity-onset diabetes of the young (MODY), which is often misdiagnosed as Type 1 or 2 diabetes, is important for providing appropriate treatment. Materials & Methods: A diabetes model was adapted to Hungary, the Netherlands, and the UK to analyse the cost-effectiveness and budget impact of different screening strategies for MODY with 20 years time horizon. Results: Compared with no screening, screening with the MODY calculator then genetic testing is considered cost-effective with respect to each country's willingness to pay threshold. The addition of autoantibody testing dominated the no screening strategy. The budget impact of the strategies ranges between 0.001 and 0.025% of annual public healthcare spending. Conclusion: The analysed strategies are considered good value for money with potential cost savings in the long term.
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Affiliation(s)
| | - Tamás Zelei
- Syreon Research Institute, 1142, Budapest, Hungary
| | - Heleen Vellekoop
- Institute for Medical Technology Assessment, Erasmus University Rotterdam, P.O. Box 1738, 3000 DR, Rotterdam, The Netherlands
| | - Simone Huygens
- Institute for Medical Technology Assessment, Erasmus University Rotterdam, P.O. Box 1738, 3000 DR, Rotterdam, The Netherlands
| | - Matthijs Versteegh
- Institute for Medical Technology Assessment, Erasmus University Rotterdam, P.O. Box 1738, 3000 DR, Rotterdam, The Netherlands
| | - Maureen Rutten-van Mölken
- Institute for Medical Technology Assessment, Erasmus University Rotterdam, P.O. Box 1738, 3000 DR, Rotterdam, The Netherlands
- Erasmus School of Health Policy & Management, Erasmus University Rotterdam, P.O. Box 1738, 3000 DR, Rotterdam, The Netherlands
| | | | | | - Sarah Wordsworth
- Health Economics Research Centre, University of Oxford, OX3 7LF, Oxford, UK
| | - Balázs Nagy
- Syreon Research Institute, 1142, Budapest, Hungary
- Center for Health Technology Assessment, Semmelweis University, 1091, Budapest, Hungary
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Moriuchi T, Otaki Y, Satou H, Chai F, Hayashida Y, Aikawa R, Sugiyama T, Sode K. Clinical Study of a High Accuracy Green Design Blood Glucose Monitor Using an Innovative Optical Transmission Absorbance System. J Diabetes Sci Technol 2022; 16:1069-1075. [PMID: 34889119 PMCID: PMC9445325 DOI: 10.1177/19322968211060865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Blood glucose monitoring (BGM) is essential for glycemic control in diabetic therapy. Followingly, accurate sensors are required for both daily personal and clinical use. The frequency of sensor use in patients with diabetes facilitates the use of disposable components. However, BGM systems are not exempt from green innovation sustainability initiatives. METHODS Clinical study of a high-accuracy green design blood glucose monitor using an innovative optical transmission absorbance system was carried out. Venous blood samples were collected from 104 patients with type II diabetes. The heat resistance of sensor strips was evaluated by storing sensor strips at 25℃ and 60℃ for approximately 3 months. Accuracy of the BGM system was evaluated via the ISO 15197:2013 protocol. RESULTS The BGM system achieved ±7.1% accuracy in glycemic level measurement, with 84% of all measurements within ±5% of the reference values. Furthermore, the sensor strip demonstrated heat resistance for more than 3 months when stored at 60℃. CONCLUSIONS A new, highly accurate BGM system was developed based on the latest optical measurement system, introducing a rare metal-free "green-strip." The developed BGM system achieved the highest reported accuracy in clinical research, using venous blood from patients with diabetes. The sensor strip also exhibited high heat resistance, reducing limitations on storage conditions.
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Affiliation(s)
| | | | | | | | | | | | | | - Koji Sode
- Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC, USA
- Koji Sode, PhD, Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC 27599, USA.
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5
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Bennett H, Tank A, Evans M, Bergenheim K, McEwan P. Cost-effectiveness of dapagliflozin as an adjunct to insulin for the treatment of type 1 diabetes mellitus in the United Kingdom. Diabetes Obes Metab 2020; 22:1047-1055. [PMID: 32037675 DOI: 10.1111/dom.13992] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/23/2020] [Accepted: 02/03/2020] [Indexed: 12/11/2022]
Abstract
AIMS To assess the cost-effectiveness of dapagliflozin, a sodium-glucose co-transporter-2 (SGLT2) inhibitor, as an adjunct to insulin in adults with type 1 diabetes mellitus (T1DM) inadequately controlled by insulin alone in the UK setting. METHODS A cost-utility analysis was conducted to compare dapagliflozin (5 mg or 10 mg) added to insulin versus insulin monotherapy (standard of care) over a lifetime horizon. Treatment efficacy and safety data were obtained from 52-week results of the DEPICT-1 and DEPICT-2 trials and a network meta-analysis of SGLT2 inhibitors in T1DM. Direct healthcare costs, life-years, and quality-adjusted life-years (QALYs) were estimated from a UK payer perspective and discounted at 3.5% annually, using the Cardiff T1DM Model. Sensitivity analyses assessed uncertainty in estimated incremental cost-effectiveness ratios (ICERs). RESULTS Dapagliflozin 5 mg was associated with gains of 0.23 life-years and 0.42 QALYs, at an additional cost of £4240 per person; corresponding to an ICER of £10 143 versus standard of care. For dapagliflozin 10 mg, incremental life-years, QALYs and costs were 0.24, 0.49 and £2964, respectively; corresponding to an ICER of £6103 versus standard of care. In probabilistic sensitivity analysis, ICER estimates fell below £20 000/QALY in 78% to 90% of simulations. Cost-effectiveness results were sensitive to changes in baseline patient characteristics and treatment effects on glycated haemoglobin; however, ICERs remained below £20 000. CONCLUSIONS At cost-effectiveness thresholds conventionally applied in the UK, dapagliflozin as an adjunct to insulin appears to be a cost-effective treatment option for people with T1DM inadequately controlled by insulin alone.
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Affiliation(s)
| | | | - Marc Evans
- Department of Medicine, University Hospital Llandough, Cardiff, UK
| | | | - Phil McEwan
- Health Economics and Outcomes Research Ltd, Cardiff, UK
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McQueen RB, Geno Rasmussen C, Waugh K, Frohnert BI, Steck AK, Yu L, Baxter J, Rewers M. Cost and Cost-effectiveness of Large-scale Screening for Type 1 Diabetes in Colorado. Diabetes Care 2020; 43:1496-1503. [PMID: 32327420 PMCID: PMC7305000 DOI: 10.2337/dc19-2003] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 04/01/2020] [Indexed: 02/03/2023]
Abstract
OBJECTIVE To assess the costs and project the potential lifetime cost-effectiveness of the ongoing Autoimmunity Screening for Kids (ASK) program, a large-scale, presymptomatic type 1 diabetes screening program for children and adolescents in the metropolitan Denver region. RESEARCH DESIGN AND METHODS We report the resource utilization, costs, and effectiveness measures from the ongoing ASK program compared with usual care (i.e., no screening). Additionally, we report a practical screening scenario by including utilization and costs relevant to routine screening in clinical practice. Finally, we project the potential cost-effectiveness of ASK and routine screening by identifying clinical benchmarks (i.e., diabetic ketoacidosis [DKA] events avoided, HbA1c improvements vs. no screening) needed to meet value thresholds of $50,000-$150,000 per quality-adjusted life-year (QALY) gained over a lifetime horizon. RESULTS Cost per case detected was $4,700 for ASK screening and $14,000 for routine screening. To achieve value thresholds of $50,000-$150,000 per QALY gained, screening costs would need to be offset by cost savings through 20% reductions in DKA events at diagnosis in addition to 0.1% (1.1 mmol/mol) improvements in HbA1c over a lifetime compared with no screening for patients who develop type 1 diabetes. Value thresholds were not met from avoiding DKA events alone in either scenario. CONCLUSIONS Presymptomatic type 1 diabetes screening may be cost-effective in areas with a high prevalence of DKA and an infrastructure facilitating screening and monitoring if the benefits of avoiding DKA events and improved HbA1c persist over long-run time horizons. As more data are collected from ASK, the model will be updated with direct evidence on screening effects.
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Affiliation(s)
- R Brett McQueen
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Cristy Geno Rasmussen
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Kathleen Waugh
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Brigitte I Frohnert
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Andrea K Steck
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Liping Yu
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Judith Baxter
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Marian Rewers
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
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Fritzen K, Basinska K, Stautner C, Braun KF, Rubio-Almanza M, Nicolucci A, Kennon B, Vergès B, Hosny Y, Schnell O. Budget Impact of Improved Diabetes Management by Utilization of Glucose Meters With a Color-Range Indicator-Comparison of Five European Healthcare Systems. J Diabetes Sci Technol 2020; 14:262-270. [PMID: 31387385 PMCID: PMC7196878 DOI: 10.1177/1932296819864665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND AND AIM Costs for the treatment of diabetes and its comorbidities are a major international issue. A recent randomized clinical trial showed that the introduction of color range indicator (CRI)-based glucose meters (GMs) positively affects the HbA1c of patients with type 1 and type 2 diabetes, when compared to GMs without a CRI. This budget impact analysis aimed to translate this beneficial effect of CRI-based GMs, OneTouch Verio Flex and OneTouch Verio, into potential monetary impact for the healthcare systems of five European countries, Germany, Spain, Italy, France, and the United Kingdom. MATERIAL AND METHODS Data from a randomized controlled trial, evaluating the effect of CRI-based GMs, were used to estimate the ten-year risk of patients for fatal myocardial infarction (MI) as calculated by the UK Prospective Diabetes Study (UKPDS) risk engine. On the basis of assessed risks for MI, the potential monetary impact for the healthcare systems in five European countries was modeled. RESULTS Based on a mean HbA1c reduction of 0.36%, as demonstrated in a randomized controlled trial, the UKPDS risk engine estimated a reduction of 2.4% of the ten-year risk of patients for fatal MI. When applied to our economic model, substantial potential cost savings for the healthcare systems of five European countries were calculated: €547 472 (France), €9.0 million (Germany), €6.0 million (Italy), €841 799 (Spain), and €421 069 (United Kingdom) per year. CONCLUSION Improving metabolic control in patients with diabetes by the utilization of CRI-based GMs may have substantial positive effects on the expenditure of the healthcare systems of several European countries.
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Affiliation(s)
| | - Kornelia Basinska
- Sciarc GmbH, Baierbrunn, Germany
- Institute of Nursing Science, Faculty of
Medicine, University of Basel, Switzerland
| | | | - Karl F. Braun
- Klinik und Poliklinik für
Unfallchirurgie, Klinikum rechts der Isar, Technische Universität München,
Germany
| | - Matilde Rubio-Almanza
- Endocrinology and Nutrition Department
Hospital Universitario y Politécnico La Fe, Valencia, Spain
- Instituto de Investigación Sanitaria La
Fe, Valencia, Spain
| | - Antonio Nicolucci
- Center for Outcomes Research and
Clinical Epidemiology (CORESEARCH), Pescara, Italy
| | - Brian Kennon
- FRCP, Diabetes Centre, Queen Elizabeth
University Hospital, Glasgow, UK
| | - Bruno Vergès
- Endocrinologie, Diabétologie, Maladies
Métaboliques et Nutrition, Centre Hospitalier Universitaire Dijon Bourgogne,
France
| | | | - Oliver Schnell
- Sciarc GmbH, Baierbrunn, Germany
- Forschergruppe Diabetes e.V.,
Muenchen-Neuherberg, Germany
- Oliver Schnell, MD, Forschergruppe Diabetes
e.V., Helmholtz Zentrum Muenchen, Ingolstaedter Landstraße 1,
Muenchen-Neuherberg 85764, Germany.
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8
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Fritzen K, Basinska K, Rubio-Almanza M, Nicolucci A, Kennon B, Vergès B, Zakrzewska K, Schnell O. Pan-European Economic Analysis to Identify Cost Savings for the Health Care Systems as a Result of Integrating Glucose Monitoring Based Telemedical Approaches Into Diabetes Management. J Diabetes Sci Technol 2019; 13:1112-1122. [PMID: 30917691 PMCID: PMC6835181 DOI: 10.1177/1932296819835172] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Self-monitoring of blood glucose supported by the diabetes-app OneTouch Reveal® has demonstrated to improve HbA1c. We aimed at analyzing costs savings related the integration of telemedical features into diabetes management. METHODS Data from a randomized controlled trial were used to assess the 10-year risk of patients for fatal myocardial infarction (MI). On the basis of this risk assessments-also related to a 5% or 10% reduction of hypoglycemic episodes-cost savings for the health care systems of five European countries-France, Germany, Italy, Spain, and the United Kingdom-were modeled. RESULTS HbA1c reduction of 0.92% in insulin-treated type 2 diabetes patients (T2DM) was associated with a 2.3% decreased 10-year risk for fatal MI. In combination with a 10% reduction of hypoglycemic events this risk reduction led to cost savings of €16.1 million (France), €57.8 million (Germany), €30.9 million (Italy), €23.8 million (Spain), and €5.8 million (UK), considering all insulin-treated T2DM patients in the respective countries. CONCLUSION Improving metabolic control and thus risk for comorbidities like MI by combining the glucose meter with CRI with telemedical features has the potential to reduce costs for European health care systems.
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Affiliation(s)
| | - Kornelia Basinska
- Sciarc GmbH, Baierbrunn, Germany
- Institute of Nursing Science, Faculty of Medicine, University of Basel, Basel, Switzerland
| | - Matilde Rubio-Almanza
- Endocrinology and Nutrition Department Hospital Universitario y Politécnico La Fe and Instituto de Investigación Sanitaria La Fe, Valencia, Spain
| | - Antonio Nicolucci
- Center for Outcomes Research and Clinical Epidemiology (CORESEARCH), Pescara, Italy
| | - Brian Kennon
- FRCP, Diabetes Centre, Queen Elizabeth University Hospital, Glasgow, UK
| | - Bruno Vergès
- Endocrinologie, Diabétologie, Maladies Métaboliques et Nutrition, Centre Hospitalier Universitaire Dijon Bourgogne, Dijon, France
| | | | - Oliver Schnell
- Sciarc GmbH, Baierbrunn, Germany
- Forschergruppe Diabetes e.V., Muenchen-Neuherberg, Germany
- Oliver Schnell, MD, Forschergruppe Diabetes e.V., Helmholtz Center Muenchen, Ingolstädter Landstraße 1, 85764 Muenchen-Neuherberg, Germany
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Smith AF, Shinkins B, Hall PS, Hulme CT, Messenger MP. Toward a Framework for Outcome-Based Analytical Performance Specifications: A Methodology Review of Indirect Methods for Evaluating the Impact of Measurement Uncertainty on Clinical Outcomes. Clin Chem 2019; 65:1363-1374. [PMID: 31444309 PMCID: PMC7055686 DOI: 10.1373/clinchem.2018.300954] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Accepted: 06/20/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND For medical tests that have a central role in clinical decision-making, current guidelines advocate outcome-based analytical performance specifications. Given that empirical (clinical trial-style) analyses are often impractical or unfeasible in this context, the ability to set such specifications is expected to rely on indirect studies to calculate the impact of test measurement uncertainty on downstream clinical, operational, and economic outcomes. Currently, however, a lack of awareness and guidance concerning available alternative indirect methods is limiting the production of outcome-based specifications. Therefore, our aim was to review available indirect methods and present an analytical framework to inform future outcome-based performance goals. CONTENT A methodology review consisting of database searches and extensive citation tracking was conducted to identify studies using indirect methods to incorporate or evaluate the impact of test measurement uncertainty on downstream outcomes (including clinical accuracy, clinical utility, and/or costs). Eighty-two studies were identified, most of which evaluated the impact of imprecision and/or bias on clinical accuracy. A common analytical framework underpinning the various methods was identified, consisting of 3 key steps: (a) calculation of "true" test values; (b) calculation of measured test values (incorporating uncertainty); and (c) calculation of the impact of discrepancies between (a) and (b) on specified outcomes. A summary of the methods adopted is provided, and key considerations are discussed. CONCLUSIONS Various approaches are available for conducting indirect assessments to inform outcome-based performance specifications. This study provides an overview of methods and key considerations to inform future studies and research in this area.
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Affiliation(s)
- Alison F Smith
- Test Evaluation Group, Academic Unit of Health Economics, University of Leeds, Leeds, UK;
- NIHR Leeds In Vitro Diagnostic (IVD) Co-operative, Leeds, UK
| | - Bethany Shinkins
- Test Evaluation Group, Academic Unit of Health Economics, University of Leeds, Leeds, UK
- NIHR Leeds In Vitro Diagnostic (IVD) Co-operative, Leeds, UK
- CanTest Collaborative, UK
| | - Peter S Hall
- Cancer Research UK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Claire T Hulme
- Test Evaluation Group, Academic Unit of Health Economics, University of Leeds, Leeds, UK
- Health Economics Group, University of Exeter, Exeter, UK
| | - Mike P Messenger
- NIHR Leeds In Vitro Diagnostic (IVD) Co-operative, Leeds, UK
- CanTest Collaborative, UK
- Leeds Centre for Personalised Medicine and Health, University of Leeds, Leeds, UK
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