I’m LADA 4.5 years now, coming up on 64 soon, on Dexcom since month 3 after diagnosis. I am a numbers person, I try things and analyze results so I understand what affects my glucose levels and by how much. For me, if I need to calibrate, I calibrate usually in the morning after getting up when my numbers are basically a flat line, and that works for me. I do a finger stick with 3 readings every morning. Tomorrow if my line is flat, I will be within 5 points of a finger stick average with Contour strips, frequently less or on spot. I find I need to recalibrate if I have a bad high or lengthy low, otherwise I can go my 10 days on 1 or 2 calibrations at the start of the session and am OK the rest of the session if I don’t have an extreme. I have never done anything with MARD but given Dexcom says, as of now, I am 95% time in range, I think I have found what works for me and can trust my Dexcom readings the rest of the day. P.S., last A1C was 5.9.
@BokiXI
24 күн бұрын
I'd say it's surprisingly accurate and the best thing we have on the table today. This compared to my own blood sugar tests. I don't pay attention to the MARD.
@SSchacht-q6l
24 күн бұрын
I have worn a Libre 14-day for the last 5 years and am satisfied with the accuracy, for the most part. Your video brought up some interesting comparisons, but I won't be changing from what I have until my insurance allows a switch. Thanks for what you do for all diabetics and giving us information we can use.
@psdaengr911
24 күн бұрын
If you are satisfied with your A1C and variability and have no hypo then that's what really matters.
@cathum
24 күн бұрын
71 yo T2D wearing libre CGM for a long time, accuracy is not a problem, I calibrate with Contour to establish the difference. Excellent guide to what I eat and drink; btw beer, wine and whisky drop the sugar a lot. And if you are carnivore, you are all set. Thanks for the great work.
@psdaengr911
24 күн бұрын
Calibration and knowing how to use the information is the key. As a +75 YO active in the forums, I know that old timers have a better understanding of how to do this than most newcomers.
@josemagana2289
19 күн бұрын
I have worn both the Libre latest models and since I switched to Dexcom G7, it’s night and day. It’s within 10 points as I call it for the most part anyone who can in my opinion should be wearing the Dexcom product. This is from my experience and a few other friendsand acquaintances
@josemagana2289
19 күн бұрын
I have worn both the Libre latest models and since I switched to Dexcom G7, it’s night and day. It’s within 10 points as I call it for the most part anyone who can in my opinion should be wearing the Dexcom product. This is from my experience and a few other friendsand acquaintances
@rancid216
5 күн бұрын
My Stelo was still reading 15 to 20 points high after two days. On another channel person that wears a Dexcom G7 said that they get the best readings by placing it on the thigh. So I took off the sensor on my arm and placed the second one on my thigh. Have to see how that works. I contacted Stelo and said I had a defected sensor. So hopefully, they replace the first sensor.
@rfink3824
24 күн бұрын
The FDA is not that hungup on accuracy. They are looking at whether there would be a change in treatment. I.e. will the reported high result in too much insulin, will the reported low result in too much glucose being ingested. Numbers below 70 and higher than 180 are important, everything in between, not so much.
@johnjacobjinglehimerschmid3555
24 күн бұрын
Just came across your channel .... subscribing ... Keep up the good vlogs!
@shelleyhodgkinson1341
20 күн бұрын
I use Dexcom G7 and the first 12 hours can be whacky! I find that putting it on earlier, before thr other one has expired..allow it to warm up for a couple hours before you pair to thr new one and its it much better but first night i usually mute it.. often get false lows
@montielstudios5947
21 күн бұрын
I have used the Libre 3 and Guardian 4 sensors. The Libre 3 has a better MARD, but I would get very frequent false highs or lows in the Libre 3 that I haven't experienced with the Guardian 4. I have found the readings on my Guardian 4 to be incredibly accurate when compared to a BGL, after taking into account the ~10 minute delay a CGM has in reflecting actuals. So, while I like the size and convenience of the Libre 3, I prefer the Guardian 4 for sure.
@den-christol8945
23 күн бұрын
My 9 year old daughter uses libre2. Ever since we've placed it in the inside part of her arm the readings are very accurate
@jonathanfriedel
24 күн бұрын
I use the Dexcom G7. Upon startup it is usually 50+ points off. I calibrate twice in the first 6 hours and usually once again on the 2nd day. This usually puts me within 5 points of the finger stick.
@psdaengr911
24 күн бұрын
I've learned to ignore my Dexcom sensors for the first 12 hours (one dinner) and use figner sticks instead. Icalibrate twice, before and after the next breakfast, to get accuracy with less overall stress. It's worth 4 finger sticks.sensor to not worry,
@kristenscott9286
23 күн бұрын
If you insert a new G7 sensor during the 12 hour grace period before starting it, then after those 12 hours it ends up pretty accurate.
@danarush2114
24 күн бұрын
Great channel and great video. Thanks for all you do. You mentioned Vitamin C which I was familiar with and pay attention to. Could you do a podcast on how Paracetamol (acetaminophen [a] ), or Tylenol in the US, impacts cgm readings? I have done quite a bit of research and have found nothing to significant. My CGM readings and my A1c from the lab are always very different, and I take paracetamol every day. I wonder what paracetamol does to cgm readings? I thikn it makes the readings lower. For example, my freestyle HbA1C is always in the low 5's (5.2 - 5.4) but my lab work places my HbA1c around 6.1-6.4. It seems that ,my glucose readings are quite a bit higher on my cgm than they really are. Perhaps this would be useful to some of your viewers who take Tylenol. Thanks!
@godhhscolonels4200
20 күн бұрын
Consensus Error Grids and MARD are the same accuracy standards BGM used to compile accuracy data and get approved. If you are comparing only to fingertips of course they are going to be different.
@julilla1
24 күн бұрын
I wonder if the MARD is lower if you calibrate? I know with Dexcom, my first 24 hours can be really wonky, and I wonder if that played into his results making it come in lower than Libre.
@michaelrocole7174
24 күн бұрын
Interesting conversation. The lack of standards outside of MFG interpretation is not very efficient. My personal experience is the Libre 3 is more accurate after the first 24 hours and good until day 14. I have compared to two different finger stick readers. Great info.
@jschmidtjeep
6 күн бұрын
I am currently using a Libra 3, but am thinking about switching to the G7. I would be intrested to hear opinions on witch is better overall, including the app. I have liked the Libra 3 app but have had problems with the sensors being widely inaccurate at times. I have also had a couple of them just stop working.
@johnjacobjinglehimerschmid3555
24 күн бұрын
As a Type II diabetic I was elated when finally the VA would prescribe me a CGM ( Libre family ). After having it for a month, I became dismayed for the simple fact that upon diagnosing the condition that a CGM wasn't immediately prescribed. Now I have a pump, Tandem and the G6 CGM, and am fairly satisfied. As far as CGM I'm now in my, more or less, 7th year of use. I've don't, as a routine ever, do calibrations with a manual GM to enter and let the CGM do a calibration. Mostly simply because most new CGM's seem to be very relative to previous values and if I ate. I will do calibrations if my CGM is giving weirdly odd values or if it bounces high and low every 5 minutes. I have never done a personal type study of CGM and finger stick readings to actually see what kind of differences there are. Mostly because, IMO, finger stick is a "BLOOD" based vs "INTERSTITIAL FLUID" based so there should be differences. Mostly, I feel ok about how I use the CGM without calibration because if I feel low ... my CGM says I'm low. I've never felt low and had it reading above 75. Many times I'll start feeling a low and I could be as high as 85 but the trend has been dropping for a significant period of time. Also I feel that since I'm feeling low and CGM does read low or going low appropriately, I feel that as long as the CGM is consistent on how and what values it reads then the CGM is realtively reading correct.
@johndoe-kh9fu
24 күн бұрын
In my experience between the G6 and G7, G6 is better by a lot still. G7 is more convenient but that means nothing in the face of inaccuracy. Missing highs and lows completely. G6 is far more accurate and stable just no where as convenient but whats more important ya know
@psdaengr911
23 күн бұрын
I've not changed from G6 to G7 because of the many reported practical issues with G7. Shorter warmup and better accuracy is unlikely to significantly improve my A1c or TIR from 5.1 and 98. If the practical issues (like falling off) are solved and the life is increased to 14 days, I might reconsider before they discontinue the G6.
@benjinkerson4982
23 күн бұрын
Finger stick meters also have published MARD and many seem not so great, this has to be taken into consideration if you were doing self tests with finger stick vs CGM. The best way to test would be blood draw but this is not feasible for doing personal tests.
@krogers17
24 күн бұрын
I don't pay attention to MARD either. I use CGM, it makes all the difference to my life and while it may not be perfect the proof in the AIC is great so overall CGM greatly enables my control.
@onnestlee
23 күн бұрын
The fact that Aidex reports a mard of around 9% baffles me. I have had so many issues with those sensors that I stopped using them completely. My readings were usually more than 20% off, occasionally more than 100%. And the trouble was that the more I tried calibrating (following their guidelines on doing it correctly) the more inaccurate it got. Simply not good enough for them to be actually useful.
@abidjan63
24 күн бұрын
I was a Libre 1 user from the begining, and I gavve up because the results of this CGM were far too false compared to the lab's ones... from 5.9 % to... 8.5 % for the HbA1c !!!! and , and my feelings were not these of the CGM... For years I came back to "the good old solution", trhat is the digital test, the seringe, and after a while the pump (Medtronic 640)instead of the seringe. I am now usiong a Guardian 4 a, a Medtronic 780, and I am quite satisfied with the result ! The so called MARD of the Guardian 4 is supposed tombe the "worst" of all CGM... but I do not think that it is the better way to evaluate the average result of of a coherent system...
@Spyre1984
24 күн бұрын
My first experience hearing about MARD was trying a new CGM that was competing with the Libre 1 + Miao miao combos in South Africa. I discovered very quickly with my experience using the new CGM, was that it was horribly inaccurate compared to the Libre 1. MARD is a big fat lie when you can can just invent your own sample bias. It's on the lines of "no added sugar!" on cereal boxes. Just a misleading label that doesn't actually represent what your experience as a diabetic will be with it. I'm super happy now that I have access to the Libre 2 and do not have to worry about Miao miao charging and bulk on my arm. :)
@theresamelvin60
24 күн бұрын
Very interesting I think you always want to use the best cgm one that is the most accurate but I do agree the libre is more accurate than the dexcom
@psdaengr911
24 күн бұрын
For me, Libre uncalibrated on arm is more accurate than Dexcom uncalibrated on abdomen is, but Dexcom calibrated is more accurate - after the first 12 hours - than Libre is.
@d.newsome6344
23 күн бұрын
T1-LADA. I've had some bad G7s. Put it on and immediately it starts low-alerting, when I know I'm not low. Finger stick verifies it. I then go through calibrations and sometimes have to call Dexcom to get a replacement. The past couple of months I've been overlapping G7s for over an hour... meaning that I put on a new G7, but don't start it up officially for an hour or so. When I start it up I get readings on my phone for both sensors. For the past couple of months the two sensors have given nearly identical readings. I am wondering if the overlapping is sort of calibrating the new sensor??? The new one picks up where the old one leaves off??? Or, perhaps, I've just been lucky???
@jane-i5u
23 күн бұрын
For me overlapping is hit or miss. Yesterday overlapped new sensor for two hours. G7 kept saying I was low when I was really very high. So frustrating. Thankfully corrected itself before bed time. I wear on upper,inner thigh. Can’t deal with the compression lows when on my arms. Today on day two seems to have settled down. Calibrated two or three times yesterday.
@psdaengr911
24 күн бұрын
My thinking is not based on belief, but tests. There's a difference between what some people believe and what I know. What I know is that STATISTICS do not match individual experience = reality. One sensor in 1000 that is completely wrong could cost one trusting person their life but have no effect on the MARD of the 1000. Group statistics are not science but probability, and MARD is an opinion of good. If you understand the delay in YOUR body, It depends on your variability how accurate a CGM CAN be, but depends on whether you can calibrate it how accurate it IS. ( Usefulnessfor management is another matter.) I have long periods of very steady BG, and my experience over +2 years is that the Dexcom G6 is not trustworthy AT ALL for the first 12 hours. No calibration is needed for an average A1c improvement of 0.5% over random test methods ( Every clinical trial results). But if calibrated once at one premeal low and one post meal high, after that it's as accurate as (calbrated) strip tests. My A1c dropped from high 6's to low 5's using calibrated CGM sensors for lifestyle guidance. But I question whether that result for me ,or the average 0.5% improvement in A1C of all those in clinical trials is worth the 10x cost increase of over using strip tests. If it wasn't covered by insurance, I wouldn't be wearing a CGM "24x7".
@imae5566
24 күн бұрын
I use a benchmark to see if in fact the G6 readings are accurate. I go every three months to see my endocrinologist and they do an A1C test. The G6 gives you a calculation, GMI, which is supposed to tell you approximately what your A1C should be. Since using the Dexcom G6, my GMI calculations and A1C outcomes have been very close. Example: GMI 6.1 and A1C 6.0; GMI 6.0 and A1C 6.2. This is the only way I can tell if the readings that I am getting are accurate. As stated in the video, there needs to be a “Gold Standard” so we can have a high level of agreement the readings we are getting from the CGM are accurate and repeatable.
@psdaengr911
24 күн бұрын
Using A1c to gauge accuracy of CGMs is like using sundials to tell time.
@imae5566
23 күн бұрын
@@psdaengr911 Well maybe it is. Nevertheless, if someone states the MARD-Accuracy, all devices should be measured against a standard which was highlighted in the video’s discussion. So until there is a better way, having two points of measurement that agree with each other is a way to know you are managing your diabetes and BGs. We also have to remember, glucometers use the same MARD accuracy system to measure their accuracy as well. So there is another correction factor that may have to be taken into account.
@katiedid27
24 күн бұрын
T1D here. I alternate which arm I put the sensor on and something I've noticed with my G7s, my right arm tends to be more accurate than my left arm pretty consistently. Especially right after warm-up, my left arm sensor will often have a dramatic false low, double arrow down saying I'm in the 60s, when the prior sensor said I was holding steady at 110ish. After a finger stick and one or more calibrations it's fine, but it's odd how it's always the left arm.
@davidgotthardt2900
24 күн бұрын
I’m the opposite. My left arm is more accurate.
@Gypsy218
24 күн бұрын
I know this all seems shocking, but for someone who has been involved in social science research (or really any other) it's related to the statistics and future funding. When you do your first studies in an area you need to show some significant results or you'll never get funded to do future studies. So you look to decrease the variability of the population. It's done all the time. All the original studies on medications were done on young males only for that reason. You might focus on a certain age group to start (leave out children and older people) who are different in many ways. In my area, since your research has to be very stringent to get published in a well known, peer reviewed journal, it might get published as preliminary results or the editors might tell you you need to do a second study before they will publish them both together. There is a certain responsibility the reader has and that's to look closely at the description of the subjects- who they are and how they're recruited. Are they all young college students, usually they're from one particular area because these are the subjects available. If you then also read the conclusions carefully you'll see a section on limitations that reminds you who the subjects were, the methodology used, etc. They're telling you, you can't necessarily generalize these results to everyone. It seems companies marketing items may misuse the results. I went to a talk at a conference on how journalists don't understand research at all and make ridiculous and misleading claims that drive researchers crazy and we were told how to handle that if you want people to actually understand your results. Basically give them an understandable but accurate written summary of all the above. What usually happens is everyone just repeats what the first article says so it needs to be right. I don't know what role the FDA plays in all this, but I can tell you you won't get government grants if you don't follow this kind of protocol and you usually have to have some preliminary study results that seem worth following up on to get funding. It's a very competitive world. When companies pay for their own research it's probably a little different.
@jane-i5u
23 күн бұрын
What is the deal with the arrows. That are so inaccurate. Will say rising fast but of you wait a couple of five minute sequences it will settle down at much lower number. I really never pay attention to the arrows.
@fullyvictorious
24 күн бұрын
🎉
@philsonnenberg6092
24 күн бұрын
I have used nearly every GGM on the market. Original Libre, G6 and G7, Medtronic Guardian 3 even the Eversense implant. I was in the Eversense clinical trial for the 3- and 6-month sensor. The only CGM I had issue with was the Guardian 3. It was just not good nearly 50% of the time. This was especially bad considering the CGM was controlling my 770G pump. The other CGMs seemed for the most part accurate and my A1C's nearly mirrored the projected A1C from the CGM software. Thing to remember is CGM's don't test your blood like a finger stick. So, your CGM will rarely match a finger stick number especially if your blood glucose is going up or down.
@psdaengr911
24 күн бұрын
If I didn't trust the accuracy of the CGM I use I couldn't trust it to control a pump. Engineers know that GIGO.
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