Correlation Ranges

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How does your facility establish an acceptable range of correlation for glucometers. From analyzer to analyzer, and lab to analyzer. We have Roche Accuchecks. We have been going based off the 12.5mg/dL or +/-12.5% whichever is higher from our CAP surveys. Just wanting to see if this was accurate.

11 Replies

Tianna Stein

Thu Jan 25, 2024 at 9:56AM

I use the DI total allowable error table. They share the requirements from various sources. For glucose, we allow 6mg/dL or 10%.

https://datainnovations.com/allowable-total-error-table

Mat Treganza

Thu Jan 25, 2024 at 9:59AM

We use the same as Tianna Stein,
Total Allowable Error Table - Data Innovations

Jennifer Toncray

Thu Jan 25, 2024 at 10:14AM

Thank you, that is a great resource. It does list a whole blood and serum option though.

Tianna Stein

Thu Jan 25, 2024 at 10:28AM

Yes, ultimately, it is a conversation between you, your admin director, and your Medical Director, on which value you want to use. When CLIA is listed as a source, I generally stear towards using their standards/requirements.

Jennifer Toncray

Thu Jan 25, 2024 at 10:39AM

Thank you!

Tamara Johnson

Thu Jan 25, 2024 at 11:43AM

Since glucose testing is waived, are correlations required. I am trying to no longer perform them due the time it takes me

Tianna Stein

Thu Jan 25, 2024 at 11:48AM

Hi Tamara - they are not required if you are not using them off-label. As far as I know, the Nova glucometers are the only ones that have FDA approval for use in critical care settings. If you use a different meter in critical care areas, the testing is considered off-label and jumps to a modified laboratory test and are then subject to non-waived testing equipment requirements such as linearity and correlations. We use the Roche meters currently, so for our ICU areas (SICU, PICU, CVICU, NICU), the meters are treated as non-waived with moderate complexity operator requirements.

Tamara Johnson

Thu Jan 25, 2024 at 11:52AM

We use nova glucometers and was aware of that. Was just doing for good laboratory practice but it's become time consuming. Thank u

Tianna Stein

Thu Jan 25, 2024 at 12:04PM

It really is good lab practice. My plan for 2024 is to use the CAP Quality Cross Check products. Twice per year you get 30 sets of 5 levels of controls. Serves as instrument comparison and alternative proficiency, can compare up to 30 instruments.

Jennifer Toncray

Thu Jan 25, 2024 at 12:46PM

We use the quality cross checks, but I do not do lab correlations.

Miranda Cotter

Tue Jan 30, 2024 at 12:22PM

We use Nova Statstrip. Our criteria is If Gluc <75 15% or 15 mg/dL; if Gluc >/- 75 then 20%
Set by our medical director.

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Correlation Ranges