I had been looking for a PDF that I just ran across again. It is showing the MARD of the Dexcom system. I thought it was interesting and decided to post it before I lost it again.
(These are slides from Dexcom public presentations focused on the G6.)
This first one shows the historical change in MARD for Dexcom over a period of years for the various systems they have released.
Dexcom-MARD-Historical.pdf (16.2 KB)
This second one (which I find more interesting) shows the details of the G6 MARD as per clinical trial results.
Dexcom-MARD-G6.pdf (148.6 KB)
A question which I think is often asked as relates to the G6 is in regards to how accurate it will/can be with no calibrations? This second slide (I think) helps to answer that question.
As is now public information per the Dexcom CEO, Dexcom is looking to gain approval from the FDA for a G6 release which will require no calibrations. (ie - factory calibrated). HOWEVER, this same system will offer OPTIONAL calibrations. One might draw from those remarks by the Dex CEO that the G6 as released will function according to the second slide as either the “G6 w/ 1 calibration per day” or as the “G6 w/ no calibrations”. (Depending on whether the user decided to perform optional calibrations or not?)
Also note on the second slide, the second and third column of data are initially confusing as to why they are two distinct columns. Notice the “ALL DATA” vs “ADULTS” which clearly indicates the “ALL DATA” contains Pediatric data as well.
As well, if anybody is unsure why the difference between the “Day 1” vs “Overall” data distinction. Dexcom has historically provided better accuracy starting on day #2 or day #3 for many people. Often times, the data on Day #1 is not as good. Although this is individual. Personally we find the data on day 1 to be quite good but I know that is not universal. As you can see in the PDF, there is a pretty big difference with the G5 between Day #1 and “Overall”. One of the goals of the G6 was to improve Day #1 performance. Although it does not look (from the data on the chart of the second PDF linked here) like this was achieved for Pediatrics (ie - All Data), when looking at the Adult data, it does appear that a very significant improvement in Day #1 performance has been achieved. It is a small slide but there really is quite a bit of data when you look into it.
Disclaimer. I like numbers.
