[Question] CGM — what am I missing here
CGM — what am I missing here. I would rather ask a basic question now than get this wrong quietly for two months.
Kept fingersticks alongside the sensor for two weeks to sanity-check it. Worth doing once.
My ApoB moved and it turned out to have nothing to do with glucose at all.
The order things move in, since nobody explains it and it worries people.
Postprandial excursions generally respond earliest. Variability tends to narrow before the average does, which is visible on a sensor and invisible on a lab result. Fasting glucose is often the laggard, and A1c — being a three-month average — is the last thing to reflect anything.
So a month in which the sensor looks better and the fasting number has not moved is the ordinary sequence, not a contradiction. Knowing that in advance would have saved me a quarter of unnecessary worry, which is why it is worth writing down.
Happy to answer the boring questions. Those are usually the ones worth asking.
best — the order this archive was captured in
Continuous monitoring shows the shape: postprandial excursions, overnight behaviour and time in range. Two people with identical A1c can have very different distributions.
Brought the whole CGM export to my appointment rather than one number. Entirely different conversation.
glycaemic control and weight are two different endpoints
This. Hypoglycaemia risk in this class is driven mostly by the other agents in the regimen.
Time in range told me far more than the average did. Two quarters with the same A1c looked completely different on the sensor.
Postprandial excursions typically respond earlier than fasting glucose, so the sequence people observe is not a sign that something is not working.
Small fix — insulin secretion in this class is glucose-dependent, which is precisely why the risk you describe comes from the other agent.
dose for glycaemic control is not the same conversation as dose for weight
Identifying details redacted from the exported report above.
CGM shows you the shape, A1c shows you the area
Agreed. A1c is an integrated average over roughly three months and treating it as a current reading causes a lot of unnecessary alarm.
Certain conditions affect A1c independently of glycaemia. If a result looks inconsistent with the sensor data, that is a question for whoever manages your care rather than for this board.
Is that a first-day sensor reading?
a single high reading is not a trend
check the trial population before quoting a result at somebody
Have you taken this to whoever manages your diabetes?
A1c reflects average glycaemia over roughly the preceding three months, weighted towards the most recent weeks. It cannot show variability and it lags any change you make.
the fasting number is the one people fixate on and it moves last
the fasting number is the one people fixate on and it moves last
Adding the obvious one — bring the export, not the single number, to whoever manages this.
That is a sensor value, not a plasma value, and the two are not interchangeable at that level of precision.
- 1Certain conditions affect A1c independently of glycaemia. If a result looks…6 comments in this branch · started by u/hamza_weiss