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Re: [IPk] Retest results.



John and Joel

Have a look at

http://www.diabeteseducator.org/export/sites/aade/_resources/pdf/research/Practice_Advisory_BGM_FINAL.pdf

There's a lot of work going on to reduce the variation from test to test,
but many of us are vulnerable to thinking that because we are seeing
digits, we are getting an 'accurate' value with +/-20% is the current
allowed margin of error.

All best

Melissa


On Wed, Jan 15, 2014 at 1:06 PM, Joel Milner <email @ redacted>wrote:

>  If you re-test after "an unexpectedly high reading" you are of course
> biasing
> the outcome. The fact that the first reading was unexpectedly high makes
> it much
> more likely that it was incorrect (e.g. due to finger contamination) and
> that a
> second (more accurate) reading will therefore be substantially lower.
>
>  FWIW, when you start a new Dexcom sensor (or restart an old one), you
> need to
> provide two independent fingerstick reading. Using my Freestyle Lite
> meter, I
> find that there can be a discrepancy of 10% between the two readings, but I
> don't see any obvious bias as to which one is the higher.
>
> Joel
> .
> Follow us at https://www.twitter.com/insulinpumpers
> Make a long URL short at http://type1.org
.
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