![]() MARD by year of manufacture varied from 4.67-5.42% indicating consistent accuracy performance over the surveillance period. MARD by glucose level was found to be consistent, yielding a maximum value of 4.81% at higher glucose (≥100 mg/dL) and a mean absolute difference (MAD) of 5.60 mg/dL at low glucose (<100 mg/dL). The overall MARD for all clinic data points (N = 80 258) was also 5.05%, while a mean bias of 1.28 was recorded. ![]() Evaluation of the distribution of strip batch MARD yielded a mean value of 5.05% (range: 3.68-6.43% at Â☑.96 standard deviations from mean). This study reports MARDs for the OneTouch Verio® glucose meter clinical data set of 80 258 data points (671 individual batches) gathered as part of a 7.5-year self-surveillance program Methods: Test strips were routinely sampled from randomly selected manufacturer's production batches and sent to one of 3 clinic sites for clinical accuracy assessment using fresh capillary blood from patients with diabetes, using both the meter system and standard laboratory reference instrument. MARD (mean absolute relative difference) is increasingly used to describe performance of glucose monitoring systems, providing a single-value quantitative measure of accuracy and allowing comparisons between different monitoring systems. Setford, Steven Grady, Mike Mackintosh, Stephen Donald, Robert Levy, Brian Seven-Year Clinical Surveillance Program Demonstrates Consistent MARD Accuracy Performance of a Blood Glucose Test Strip. ![]() © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2018. The massive burden of diabetes in low-resource settings demands improvements in test technologies. While the urine glucose test strip may identify persons with diabetes that might otherwise go undiagnosed in these settings, its poor sensitivity cannot be ignored. Low cost, easy to use diabetes tools are essential for low-resource communities with minimal infrastructure. Those missed by the urine glucose test strip had lower venous fasting blood glucose, lower venous blood glucose 2 hours after OGTT and lower HbA1c compared with those correctly diagnosed. The urine glucose test strip was 14% sensitive and 99% specific and failed to identify 201 individuals with diabetes while falsely identifying 7 without diabetes. Of the 1289 participants, 234 (18%) had diabetes based on either cFBG measurement (74, 32%) or the OGTT (160, 68%). for glucose concentrations 6.5% and capillary fasting blood glucose (cFBG) measurement ≥126 mg/dL were assessed against a composite reference standard of cFBGmeasurement ≥200 mg/dL or venous blood glucose 2 hours after oral glucose tolerance test (OGTT) ≥200 mg/dL. Lay users also compared the speed and ease of use between the new strip and the current FreeStyle strip. System accuracy, lay user performance, and ease of use for finger capillary blood testing and accuracy for venous blood testing were evaluated at clinics. laboratory evaluation included precision, linearity, dynamic range, effects of operating temperature, humidity, altitude, hematocrit, interferents, and blood reapplication. We evaluated the performance of this new strip. Lock, John Paul Brazg, Ronald Bernstein, Robert M Taylor, Elizabeth Patel, Mona Ward, Jeanne Alva, Shridhara Chen, Ting Welsh, Zoë Amor, Walter Bhogal, Claire Ng, RonaldĪ new strip, designed to enhance the ease of use and minimize interference of non- glucose sugars, has been developed to replace the current FreeStyle (Abbott Diabetes Care, Alameda, CA) blood glucose test strip. Performance of a new test strip for freestyle blood glucose monitoring systems.
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