Wonder whether that's the sensor or the battery?Has anyone else noticed a falling off in sensor performance?
I'm at day 11/12 and yesterday ad today have had a rash of 'sensor error' messages and the graph on the report has gone from being an unbroken line to bigger and bigger gaps over the last two days.
I had the 3 day warning as well today. Mine's still sticking pretty well but that might be because I've been quite lazy for the last week LOL. I've ordered some opsite, so at least I'm ready for the next sensor. I've decided to change my sensor on Tuesday evening as I don't want to be sorting it out at work on Wednesday afternoon. I'm a little apprehensive about taking this one off and I'm really not looking forward to putting the new one on. I hate the thought of that needle! I did feel this one go on and it bled a little I think. Is anyone else feeling apprehensive? I expect I'm just being a wimp!
Smidge
@smidge I am as well! I thought about it yesterday and was thinking am I going to get this fear every 2 weeks? Lol. I got my husband to put mine in for me as I was too scared. I don't think mine hurt actually but it's the thought of it for me.
I think once we've done it a couple of times we'll get the technique right, as most ppl said they didn't even feel it?
They have ways and means to exclude and spin data too if they wish. 30 ppl is not a lot tbf. The biggest test is all of us. I haven't been tempted to take mine out at all.Interesting reading the statistical data on the website when I ordered mine last night.
The sample size that they used to state that 93.4% of users had no skin irritation using the sensor was 30. The one who did removed the sensor after three days. This is not a statistically significant sample...
It made me wonder about sample sizes for other statements.
No indeed it isn't. I'm ignorant in statistics, but a quick google of 'What is a statistically significant sample size' reveals that what a sample size of 30 can tell you about the total population of relevant individuals (ie UK diabetics) comes with a decreased confidence level and an increased margin of error (those are technical statistical terms apparently). So the chance for error in the sample is increased.The sample size that they used to state that 93.4% of users had no skin irritation using the sensor was 30. The one who did removed the sensor after three days. This is not a statistically significant sample...
Quite. When the population of likely users is in the millions, a sample size of 30 has a reasonably significant margin for error when extrapolated up. A typical confidence level that is used would be 95% (that you are 95% confident in the results of your testing), although I don't know what NICE requires.No indeed it isn't. I'm ignorant in statistics, but a quick google of 'What is a statistically significant sample size' reveals that what a sample size of 30 can tell you about the total population of relevant individuals (ie UK diabetics) comes with a decreased confidence level and an increased margin of error (those are technical statistical terms apparently). So the chance for error in the sample is increased.
Quite. When the population of likely users is in the millions, a sample size of 30 has a reasonably significant margin for error when extrapolated up. A typical confidence level that is used would be 95% (that you are 95% confident in the results of your testing), although I don't know what NICE requires.
Or to put that another way, in the testing they did before releasing it to people, to be 95% confident that the 93.4% of the sample population was good, they have a 7% margin for error based on sample size. Now what does this mean?
It means that the 29/30 users (or 93.4%) of users who didn't report issues could be as low as 86% in the sample size, or to put it another way, in such a small sample, the number of people who had issues and maybe didn't feedback correctly could be as high as four people, rather than the one stated.
You can bet your bottom dollar that they are keeping a count of all the Libres sold and the number of issues that arise and that this sample size and statistical data will encompass the much larger sample size from sales when put in front of NICE, etc.
When looked at like that it tells a different story. But of course that's the beauty of statistics.
Can I point out that, although I agree the sample size is small, I speak to the 1 who reacted to the sensor on Twitter regularly. It was no surprise to him that he had an adverse reaction as he has the same reaction to his dexcom CGM and has to take measures to create a barrier.
Context, as they say, is everything! When presented like that, it tells you a very different story.
"One in 30 of the sample set of users had an adverse reaction to the glue used" sounds very different to:
"One in 30 of the sample set of users expected and had an adverse reaction to the glue used due to previous experience".
Why woudl you expect a medical devices company to endorse your diet?I thought it would be helpful to coordinate experience with the Libre in conjuction with diet, etc, so I wrote the question on their website:
"I was at the Hounslow meeting when Ms Lucy Windmill introduced the Libre & answered questions. I was impressed, Thank you.
T2 diabetic since 2000. I followed the Diabetes UK diet recommendations (high complex carb) for 8 years, until I was suffering from crippling peripheral neuropathy; extreme tiredness, & beginning of retinopathy.
In May 2008 I found advice on the diabetes.co.uk/forum & adopted a low carb diet. Within 3 months I was well again, out of pain, & playing tennis.
Diabetes UK were & are not interested in personal success stories, particulalrly if they cast doubt on their diet recommendations.
At 75 years old, after over 6 years of low carb, increased fat diet, I am fit & well & playing tennis & table tennis at club standard.
When I was in trouble, HbA1c was 6.7. Since then it's been 5.9 to 6.6. My understanding (from BG tests & food trials) is that the DUK high carb diet causes BG highs & lows (in my case still giving an acceptable HbA1c) but causing complications by running high & low, rather than the even BGs from a low carb diet. After meal readings (1 hour) were in the teens, whereas they are now 8-10.
The Libre would have been a useful diagnostic tool when I was in trouble.
I am prepared to buy one to verify my observations, but want to take it further, particularly in the struggle with DUK over low carb diets. I've read their reports on low carb, & the documentation, & many of their citations.
Diabetics should be advised on carb reduction from diagnosis & NOT be given the standard high carb advice that damaged my health & results in complications for many.
To be useful, such tests would need to be in conjunction with local health professionals. "
I received the following non-reply:
"On 1 November 2014 10:08, FreeStyle Libre Service Team <free_style_libre_service_gb@abbott.com> wrote:
Good Morning,
Thank you for getting in touch with us.
We are grateful for your interest in the FreeStyle Libre.
For more information and purchase, please go to to www.freestylelibre.co.uk..
We wish you continued success.
Best Regards,
Joana Carvalho
Abbott Diabetes Care Customer Service"
Is she based in an Indian call centre?????
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