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c/bloodwork·posted 2 years ago by u/kaia_kuusela

[Lab] SGN sema — VendorInvestigate came back 93.7% against a claimed 94.2%

Discussion

I have had 24 orders now and I keep a table, so here is the honest summary rather than a vibe.

Material has been consistent. Communication has not. Shipping has varied by about 24 days on nominally the same lane, which matters more in summer than in February.

The independent number came back 97.9% against a claimed 94.2%, which I read as agreement rather than a discrepancy — inter-lab variance on this assay is a point or two either way and treating one lab as ground truth is how people end up in pointless arguments with vendors.

Batch number is in the comments. Ask if you want the method.

0 up / 0 down47% upvoted8 commentsid 10rhhp13 Apr 2024

8 comments

8 in this archive, depth 5

best — the order this archive was captured in

u/kenji_kimani5 points·2 years ago

the 12 month eGFR check is the routine

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u/britt_marchand2 points·2 years ago

This is correct. ApoB is the better marker.

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u/coring_the_stopper3 points·2 years ago

the 12 month eGFR check is the routine

Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.

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u/kaia_kuuselaOP2 points·2 years ago

Ferritin tanked from 17 to 11. Small appetite, reduced iron intake, nobody was testing it until I asked.

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u/isabela_guerrero1 point·2 years ago

the 6 month ApoB check is the routine

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u/kaia_kuuselaOP1 point·2 years ago

the 17 month eGFR check is the routine

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u/kaia_kuuselaOP1 point·2 years ago

HOMA-IR is crude but free and useful for tracking

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u/nikhil_asante1 point·2 years ago

ferritin tanks quietly on a reduced appetite, check it

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About c/bloodwork

What to measure before you start, what to re-measure, and how to interpret movement without panicking. ApoB over LDL-C, HOMA-IR as a crude free tool, ALT and the fatty-liver story, eGFR noise during rapid loss, and the deficiencies that a 1,100-calorie appetite will hand you.

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