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Freestyle Libre - worth every penny
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<blockquote data-quote="Celsus" data-source="post: 1579866" data-attributes="member: 185674"><p><span style="font-family: 'Arial'"><span style="font-size: 15px">I am no special promotor of Abbott's products and have no private or professional interests involved either.</span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 15px">But happy to share some of the clinical factual data being gathered over past years, with evidence that the Freestyle Libre is as good as many other classic fingerprick meters out on the market, and even better than some. And that it certainly gives results within the market criteria for giving reliable results throughout the sensor lifetime. And that includes being within the 15% margin range as discussed above for the UK market and that without need for fingerprick calibration. </span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 15px"></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 15px">When evaluating accuracy for sensor-based technology you use a standard defined as Mean Absolute Relative Difference (MARD). Here the Libre scores 11.4%, while just to compare the Abbott FreeStyle Navigator II CGM system scores 12.3% and Dexcom G5 Mobile scored 12.5%. All very good and reasonable results!</span></span></p><p></p><p><span style="font-family: 'Arial'"><span style="font-size: 15px"><em>A different metric used to demonstrate the clinical relevance of a glucose monitoring system is known as the Clark Error Grid Analysis (EGA). The grid show the clinical acceptability of glucose monitoring system results based on how close they are to a reference glucose result. The Error Grids have zones from zone A to zone E. Results in zones A and B are considered to be clinically acceptable, whereas results outside of zones A and B may have a negative clinical outcome. The higher the percentage of results in zones A and B, the more clinically accurate the glucose system is.</em></span></span></p><p></p><p><span style="font-family: 'Arial'"><span style="font-size: 15px"><em>The FreeStyle Libre system scored 99.7% within zones A and B.</em></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 15px"><em>Abbott FreeStyle Navigator II CGM system scored 97.7%</em></span></span></p><p><span style="font-family: 'Arial'"><span style="font-size: 15px"><em>Dexcom G4 reported to be 98.6%3.</em></span></span></p><p><em><span style="font-family: 'Arial'">All again excellent results.</span></em></p><p></p><p>You find a link to the clinical study here:</p><p><a href="https://freestylediabetes.ie/freestyle-thinking/post/accuracy" target="_blank">https://freestylediabetes.ie/freestyle-thinking/post/accuracy</a></p><p></p><p>For comparison, here is a study of 5 of the classic fingerprick meters on the market:</p><p><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3317395/" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3317395/</a></p><p></p><p><em><span style="font-family: 'Arial'"><span style="font-size: 15px">And here a study, though on a smallish sample size, on the FreeStyle libre accuracy:</span></span></em></p><p><em><span style="font-family: 'Arial'"><a href="http://drc.bmj.com/content/5/1/e000320" target="_blank">http://drc.bmj.com/content/5/1/e000320</a></span></em></p><p><em><span style="font-family: 'Arial'">The correlation shown in the Clark Error Grid zone A is though very clear and comforting for me to trust the results using this meter on a daily basis.</span></em></p><p></p><p><em><span style="font-family: 'Arial'">Please also notice the diffuse grid lines on bg below around 60 mmol/L, as supporting my notion above that no meter is expected to be trusted with regards to the exact absolute value when measuring hypo levels. </span></em> I noted btw in the studies that the Freestyle Libre tend to show lower absolute number when in the hypo area, which I will take any day over a meter showing a bit too high when down there. Anyway, if your are LOW - Get some sugar in! ;o)</p><p></p><p>Maybe I have been lucky, as we are all unique individuals in this world. But I have repeatedly been able to measure that my Freestyle Libre measurements correlated with my Roche AccuCheck mobile/compact meters. So after going through 8 sensors or so, with less and less check measures that kept confirming, I simply in the end dropped the old fingerprick meter all together. The sticky film Abbott used in the beginning has also been improved, so no rash or anything anymore on the skin below the sensor.</p><p></p><p>Its not the cure I want - But I definitely agree with [USER=439871]@Jason_Avoneg[/USER] that its worth every penny!</p></blockquote><p></p>
[QUOTE="Celsus, post: 1579866, member: 185674"] [FONT=Arial][SIZE=4]I am no special promotor of Abbott's products and have no private or professional interests involved either. But happy to share some of the clinical factual data being gathered over past years, with evidence that the Freestyle Libre is as good as many other classic fingerprick meters out on the market, and even better than some. And that it certainly gives results within the market criteria for giving reliable results throughout the sensor lifetime. And that includes being within the 15% margin range as discussed above for the UK market and that without need for fingerprick calibration. When evaluating accuracy for sensor-based technology you use a standard defined as Mean Absolute Relative Difference (MARD). Here the Libre scores 11.4%, while just to compare the Abbott FreeStyle Navigator II CGM system scores 12.3% and Dexcom G5 Mobile scored 12.5%. All very good and reasonable results![/SIZE][/FONT] [SIZE=4][I][/I][/SIZE] [FONT=Arial][SIZE=4][I]A different metric used to demonstrate the clinical relevance of a glucose monitoring system is known as the Clark Error Grid Analysis (EGA). The grid show the clinical acceptability of glucose monitoring system results based on how close they are to a reference glucose result. The Error Grids have zones from zone A to zone E. Results in zones A and B are considered to be clinically acceptable, whereas results outside of zones A and B may have a negative clinical outcome. The higher the percentage of results in zones A and B, the more clinically accurate the glucose system is.[/I][/SIZE][/FONT] [FONT=Arial][SIZE=4][I]The FreeStyle Libre system scored 99.7% within zones A and B.[/I] [I]Abbott FreeStyle Navigator II CGM system scored 97.7%[/I] [I]Dexcom G4 reported to be 98.6%3.[/I][/SIZE][/FONT] [I][FONT=Arial]All again excellent results.[/FONT][/I] [FONT=Arial][SIZE=4][I][/I][/SIZE][/FONT] You find a link to the clinical study here: [URL]https://freestylediabetes.ie/freestyle-thinking/post/accuracy[/URL] For comparison, here is a study of 5 of the classic fingerprick meters on the market: [URL]https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3317395/[/URL] [I][FONT=Arial][SIZE=4]And here a study, though on a smallish sample size, on the FreeStyle libre accuracy:[/SIZE] [URL]http://drc.bmj.com/content/5/1/e000320[/URL] The correlation shown in the Clark Error Grid zone A is though very clear and comforting for me to trust the results using this meter on a daily basis.[/FONT][/I] [I][FONT=Arial]Please also notice the diffuse grid lines on bg below around 60 mmol/L, as supporting my notion above that no meter is expected to be trusted with regards to the exact absolute value when measuring hypo levels. [/FONT][/I] I noted btw in the studies that the Freestyle Libre tend to show lower absolute number when in the hypo area, which I will take any day over a meter showing a bit too high when down there. Anyway, if your are LOW - Get some sugar in! ;o) Maybe I have been lucky, as we are all unique individuals in this world. But I have repeatedly been able to measure that my Freestyle Libre measurements correlated with my Roche AccuCheck mobile/compact meters. So after going through 8 sensors or so, with less and less check measures that kept confirming, I simply in the end dropped the old fingerprick meter all together. The sticky film Abbott used in the beginning has also been improved, so no rash or anything anymore on the skin below the sensor. Its not the cure I want - But I definitely agree with [USER=439871]@Jason_Avoneg[/USER] that its worth every penny! [/QUOTE]
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