Comparability of >2 Non-Waived Devices (epocs)

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I'm in the process of implementing five epocs for our respiratory department. I'm trying to come up with a procedure for our 6-month comparisons, both epoc-to-epoc and epoc-to-RapidPoint (our backup method in the main lab). I've never had more than two of the same non-waived instrument, and I'm having a hard time wrapping my mind around how to compare five identical devices to each other and to our backup method. Can I choose one epoc to be my "reference" device and compare the RapidPoint and epocs 2-5 to epoc 1? That would allow me to still do paired t-tests and linear regressions. Or would this be a situation where ANOVA would be more appropriate? Once upon a time I really enjoyed Statistics class, but that was many years ago and I'm rusty!

I would appreciate any input on how other facilities handle comparisons when they have a fleet of >2 non-waived POC devices.

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There are QUALITY CROSS CHECK PRODUCTS from CAP that can be use for Instrument to Instrument correlation purposes.

Sincerely,
Alma
“Far and away the best prize that life offers is the CHANCE to work hard at work worth doing” – Theodore Roosevelt

Alma Calzado-Knudson, MBA, CLS, MT (ASCPi & AMT)
Manager, Lab Quality and Point of Care Testing
Student Education Coordinator
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Leah Landis
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