I know there has been a lot of discussion on comparing the G5 vs the G6. And depending on who you listen to, it’s either a lot better, the same, or worse. I even did a poll on it a while back.
But I am not sure if anyone has actually worn them both at the same time and done an actual comparison of numbers! Has anyone worn them simultaneously? If so, I’d love to hear what you thought.
But anyway, I think the only way for me to know which is better for me is to wear them both at the same time and actually compare numbers.
Thanks to @LarissaW this was made possible. Thanks for the sensor donation and the lending of the transmitter and receiver! You’re the best!
I am on day 3 of the comparison right now. I will come back with all the numbers.
I am running the G6 sensors and G5 sensors at the same time, My comparison will span about 3 weeks - 10 days each for the two G6 sensors I have, and 7 days each for the three G5 sensors I will be using.
I know Dexcom has reports for this sort of stuff. But I have no idea how they did their test. Maybe it was only when flat at certain levels, or maybe they did tests when BG was rising and falling, or who knows what they did. Who knows how many BG tests or anything like that. Also, did they compare the G5 and G6 simultaneously during real-life moments?
I mean, lab stuff may not be the same as real life, depending on how they do the tests. Maybe they did not have people sleeping and waking up, working, exercising, eating a bunch of food, drinking coffee, drinking other things, or all of the other possibilities in a lab, all while comparing the G5 or G6. I have no idea how they ran their tests.
But I know how I am doing mine.
The way I decided to do the test was pretty simple, and seemed like an extremely fair way to do it. I test a lot. I mean…a lot. So I am doing it like this.
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Every BG test that I do - I will write down that BG number and what each CGM is reporting at that moment.
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I will use the same meter, a Contour Next One. No complaints about using a crappy meter, this thing is top-notch.
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If I happen to have a BG meter reading that is off, I will test it again. I know when it is off.
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I will keep both CGM receivers together, so they will both either be picking up their sensor readings or not picking them up. Neither one will have an advantage/disadvantage of getting more or less sensors readings. If one receiver is out of sensor range, they will both be out of sensor range.
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Nothing like, “Hey no fair, that test does not count. You were rising or falling, too high, too low, or eating or sleeping…”
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I am not ever going to test my BG just for the sake of doing a CGM comparison. These are all actual BG tests I would normally do. My BG tests are frequent enough and at different time intervals that they are pretty much randomly timed throughout the day. If I test, I will log it. But I am not testing just for the sake of scoring a CGM at that particular moment. That makes it much more fair!
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But…if I do a quick succession of tests, I am not going to count all of them. Like sometimes I may do 3 or 4 tests within a 15 minute span. I will only count the first one, so that any big “off” difference at that moment is not multiplied for any of the CGM’s.
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I am not counting my BG tests when running, because I am not carrying two CGM receivers and a notebook with me.
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Likewise, if I leave the house, I won’t count those tests. Again, not bringing the notebook with me when I leave the house.
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But I will have a lot of tests and a lot of random times - before eating, after eating, waking up, going to bed, etc, etc.
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I will put the numbers together in a logical way, like a an overall comparison of differences between the CGM’s and meter.
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I will also have a comparison for different ranges - like low, normal, and high.
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I will also group different days, because I heard the first day for the G6 sucks. So I will show all the days together, and then also have all the days broken out individually.
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I will look at if a CGM tended to be higher or lower more frequently, and look at the average (absolute value) difference as well.
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I will follow the rules for them both for calibration. I will calibrate the G5 every 12 hours. For the G6, I will use factory calibration and only calibrate it if it is way off. Those are the rules I got from Dexcom! I called them to ask!
Ultimately it comes down to which CGM is closer to my meter for me. Which is more accurate? That is all that matters for me.
Better insertion, no need to calibrate, 10 day wear vs 7 day wear - all seems like marketing BS are not priorities to me. The only thing that really matters to me is accuracy, so that is what I am looking to find out.
Will let you know and share numbers when I am done!