RI is rejected when how many results fall outside the proposed RI?

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Study for the ACVIM Small Animal Internal Medicine Exam to enhance your veterinary knowledge. Prepare with flashcards and multiple-choice questions, featuring hints and explanations. Ensure success in your exam journey!

Multiple Choice

RI is rejected when how many results fall outside the proposed RI?

Explanation:
Verifying a proposed reference interval uses a local sample of healthy individuals, typically 20, to see how many fall outside the interval. If five or more of those 20 results lie outside the proposed RI, the interval is not considered appropriate for the local population and should be rederived from the local data. This threshold (more than four outside) balances practical sample size with recognizing when the proposed RI doesn’t reflect the lab’s population or assay performance. So, more than four results outside triggers a de novo RI derivation.

Verifying a proposed reference interval uses a local sample of healthy individuals, typically 20, to see how many fall outside the interval. If five or more of those 20 results lie outside the proposed RI, the interval is not considered appropriate for the local population and should be rederived from the local data. This threshold (more than four outside) balances practical sample size with recognizing when the proposed RI doesn’t reflect the lab’s population or assay performance. So, more than four results outside triggers a de novo RI derivation.

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