Freestyle libre 2

[Dee1960]

This is what it's saying? Are they usually accurate

 

[grantg]

logging into the libreview.com website is a little closer (for me) Glucose Management Indicator (GMI)
after generating a report. Still a little off but has been usually within acceptable error ratio. 30 days/60days. guess its partly due to cell life cycle alongside possible 'compression lows' or something have found in general libre reads lower for me (for some others appears to read a little higher). Current sensor which said needed to replace was reading a fair bit lower if i went via a week data (sensor on day 8) it would be miles out. You can check rough accuracy via fingerprick best done when graph is relatively flat to get an idea of % could be off by.

 

[Jaylee]

This is what it's saying? Are they usually accurate

Hi,

I normally look at A1c over a 90 day or 3 month period?
But even then they can romp in for me 15% higher than what comes in from the lab. (Blood draw.) getting a pleasant report from a DSN.
If your graph has relatively unwavered for a few hours? You could check against a BG meter?

Personally. The Libre still works well for me with the daily managment. (With T1.)
These sensors don’t test blood but the glucose in interstitial fluid so there can be a little lag.

 

[Lakeslover]

For me my libre always reads under. My actual HbA1c after a blood test is usually around 5% higher than the estimation on the libre. So far example 50 on the libre will become 55 from the blood test.

 

[Dee1960]

Thank you

 

[Tony337]

 

[Tony337]

Whoops not very good with tech...
This is mine over 90 days and when i get my next hba1c i expect it to be 39 or 40.
The lower mine gets the difference gets smaller too but your real hba1c will be slightly higher.

Good luck

Tony

 

[Dee1960]

Whoops not very good with tech...
This is mine over 90 days and when i get my next hba1c i expect it to be 39 or 40.
The lower mine gets the difference gets smaller too but your real hba1c will be slightly higher.

Good luck

Tony

Thank you Tony

 

[peterb999]

I have been wearing the libre 2 for the last couple of weeks. It's estimated Hba1c shows as 30 mmol (4.9%).

I had a blood test on Wednesday and the Hba1c came up as 33 so it's not too far away.

 

[Dee1960]

Wow well done

I have been wearing the libre 2 for the last couple of weeks. It's estimated Hba1c shows as 30 mmol (4.9%).

I had a blood test on Wednesday and the Hba1c came up as 33 so it's not too far away.

 

[Bill_St]

The accuracy of a blood test is by no means absolute.
Here is the BMJ advice to doctors.

I have set the blood result to 33mmol - see the wide range that it could mean. 27-39!
And that is just to the 95% probability.
It could well be that the CGM is more accurate than the blood sample test.
Remember the blood test is just one single measurement- the CGM is the average of many, perhaps across a number of sensors.

Beware all comparisons with blood samples - they can have great variability both with individual and laboratory variance. This BMJ tool allows the comparison of two laboratory blood tests.

Your results may vary: the imprecision of medical measurements

### What you need to know Clinicians and patients need to interpret a multitude of medical measurements. These are often central to monitoring health and informed decision making. Has the serum cholesterol concentration come down since starting a statin? Have vitamin D levels gone up? Is the...

www.bmj.com