HbA1c Tracking and Diabetes Record Keeping
If you or someone in your family lives with diabetes, the appointments follow a rhythm: a test, a number, an adjustment, three months, repeat. What decides how useful each of those appointments is turns out to be mostly clerical — whether the last three months exist as a record anybody can read, or only as a general impression.
This is about keeping the record. It is not advice about managing diabetes, and nothing here is a treatment or a remedy. Your doctor sets your targets and your treatment, and this piece does not.
What HbA1c actually measures
Ordinary blood sugar tells you about a moment. HbA1c tells you about a season.
Glucose in the blood attaches to haemoglobin in red cells, and it stays attached for the life of that cell. Red cells live around three months, so the proportion of haemoglobin carrying glucose — reported as a percentage — reflects roughly the previous two to three months rather than this morning. This is why it is checked quarterly rather than daily, and why one careful week before the test moves it far less than people hope.
It is also why the number is hard to argue with, and why it is the one that gets watched.
What the numbers broadly mean
These are the widely used diagnostic thresholds, and they are a starting point for a conversation with a doctor, not a self-diagnosis:
- Below 5.7% — normal range
- 5.7% to 6.4% — prediabetes range
- 6.5% and above, on two occasions — the usual diagnostic threshold for diabetes
For somebody already diagnosed, the target is a different question entirely, and it is genuinely individual. A commonly quoted general target is below 7%, but a doctor may set it higher for an older person, someone with heart or kidney disease, or anyone who has had dangerous low-sugar episodes — because pushing the average down has its own risks. This is exactly the decision that belongs to your doctor and not to an article.
A note on the test itself: anaemia, recent blood loss, pregnancy and some haemoglobin variants can all make HbA1c read misleadingly, because they change how long red cells live. If your haemoglobin is low, that is worth mentioning when the result is discussed.
The record that is actually worth keeping
Most people either record nothing, or record far too much for three months and then stop. The version that survives is small:
- Every HbA1c, with its date and the lab. This is the spine of the record. Nothing else matters as much.
- The medicines, with doses, and the date anything changed. A number is uninterpretable without knowing what was being taken at the time.
- Home glucose readings, if you take them — with the time and whether it was before or after food. A reading without that context is a number without a unit.
- Any low-sugar episode. What happened, roughly when, what you had eaten. These change treatment decisions more than a good average does.
- The related annual checks — eyes, feet, kidney function, blood pressure, lipids — with the date each was last done. These are the ones that quietly slip.
Why the dates matter more than the readings
A folder of glucose readings with no dates is close to worthless. The question at an appointment is almost never "what is your sugar" — it is "what changed, and when, relative to the change we made last time".
That makes the date of a medicine change the single most valuable thing in the file, and it is the item least likely to be written down. If you record nothing else between appointments, record the day a dose changed.
The annual checks that get missed
Quarterly HbA1c has its own momentum. The yearly checks do not, because nothing prompts them and skipping one has no immediate consequence. Eyes, feet, kidney function and lipids are the usual list, and the commonest reason one is missed is that nobody could remember when it was last done.
A record with a date against each of these turns "have I had my eyes checked?" from a guess into a fact — which is most of the value of keeping a record at all.
Making it survive contact with real life
- Photograph the report on the day, before it is folded away.
- Keep the lab's name with the result — methods differ, and a jump between labs is not always a jump in you.
- Keep the medicine list current rather than complete. The current doses are what get asked for.
- If you are keeping this for a parent, agree which of you owns the record. Two half-records is the usual failure.
References
• World Health Organization — diabetes
Free for 90 days, no card needed. After that, keeping the record costs ₹349 for the year.
General information, not medical advice. Always talk to a qualified doctor about your own care. Where this and your doctor disagree, your doctor is right.