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Lab reports & COAs

One percentage, several possible denominators

Editorial composite. This alias and dialogue are rewritten from recurring evidence questions. They do not identify a community member or reproduce a private conversation.

A failure percentage can use all collected reports, only reports eligible for a specific measurement, only recent reports, or only records that could be matched to a vendor. Those denominators answer different questions.

Before repeating the percentage, preserve the eligible population, affected count, exclusions, and extraction date. If the denominator cannot be reconstructed, the number should be treated as a quotation from the source rather than a result independently reproduced here.

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NorthBatch_17STAFFCOMPOSITE

Editorial composite. This alias and dialogue are rewritten from recurring evidence questions. They do not identify a community member or reproduce a private conversation.

A useful short form is affected over eligible, followed by the extraction date. The exclusions can sit one line below instead of disappearing.

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ReceiptFox_24STAFFCOMPOSITE

Editorial composite. This alias and dialogue are rewritten from recurring evidence questions. They do not identify a community member or reproduce a private conversation.

If the source changes its eligible population later, preserve the earlier numerator and denominator together. Otherwise a historical percentage can become impossible to reproduce.

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