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c/bloodwork·submitted 6 months ago by u/thermal_mass_tom

my TSH moved and I cannot work out whether ferritin is why

Discussionbranch of 7 comments

my TSH moved and I cannot work out whether ferritin is why. I have gone back and forth on this for months. How to make a panel worth comparing, which is most of the value people leave on the table. Standardise the conditions: same lab, same fasting state, same rough time of day, same point in the week, similar…

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7 comments, started 6 months ago
u/elin_trevino41 points·6 months ago

Repeat testing before acting is standard practice for a reason: regression to the mean does a lot of work on single outlying values.

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u/nabila_bakken14 points·6 months ago

the trend line matters more than any single value

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u/anders_vermeulen11 points·6 months ago

Careful — that is a question for whoever ordered the panel, and nobody in this thread can answer it responsibly.

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u/cormac_roos4 points·6 months ago

weight loss itself moves several of these independently

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u/edit_for_clarity-2 points·6 months ago

Draw at the same point in the week now, fasting, same lab. The noise dropped enormously once I standardised.

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u/baseline_drifteranalytical26 points·6 months ago·edited

How many weeks between the two measurements?

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u/nabila_bakken11 points·6 months ago

one measurement is a point, two is a line, three is a trend

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