A narrower follow-up, since the general answer is now clear:
What would you measure differently if you were starting again?
kate.chem said:For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine.
I read this differently from kate.chem, on substance rather than tone. The objection nobody has made: this only works if the measurement is doing what we assume it is doing, and that assumption has not been tested here.
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Browse GL Biochemkate.chem said:For anyone reading later: the numbers in this thread are worth checking against a primary source before you act on them, including mine.
Thank you for spelling out the reasoning rather than just the conclusion. Printing the relevant bit and taking it with me.
Clinical perspective, offered as context rather than as advice. Take it one variable at a time. Almost every unanswerable question in these threads is unanswerable because three things changed in the same fortnight, and no amount of subsequent argument can untangle them after the fact.