Part 02 · Understand your sugar report without fear

Health education for adults and families, mainly about type 2 diabetes. Do not change medicines yourself. Type 1 diabetes, pregnancy, children and complex illness need individual medical care.

A red mark on a laboratory report can make a whole family anxious. A reassuring result can create the opposite problem: “Everything is fine, so I can stop treatment.” A report is information for decisions, not a judgement about your character.

What do the main tests measure?

Fasting plasma glucose is a laboratory measurement after at least eight hours without calories; plain water is usually allowed. Ask beforehand how to handle your usual medicines. HbA1c gives a picture of average glucose over roughly three months and does not require fasting.

For non-pregnant adults, commonly used ADA-based ranges are:

• Fasting glucose below 100 mg/dL: usual normal range; 100–125: prediabetes range; 126 or above: diabetes range.
• HbA1c below 5.7%: usual normal range; 5.7–6.4%: prediabetes range; 6.5% or above: diabetes range.

These are diagnostic ranges, not your personal treatment targets. Other guidance uses a different lower fasting threshold for prediabetes. Without clear symptoms or unequivocal high glucose, an abnormal result generally needs confirmation by your clinician.

A home meter has a different role

A single home meter result cannot reliably diagnose new diabetes. For monitoring, wash and dry your hands, check strip expiry and record the time in relation to food. A usual post-meal reading is different from a formal oral glucose tolerance test. Never share finger-pricking lancets.

HbA1c can be misleading with some forms of anaemia, haemoglobin variation, recent transfusion or other conditions affecting red blood cells. Tell your clinician if your meter records and HbA1c seem inconsistent.

Make the next appointment useful

Bring earlier reports, your medicine list and a brief record of symptoms. Ask: What is my agreed target? When should I test at home? When is the next laboratory review? What should I do if readings repeatedly fall outside my range?

Do not buy extra tests simply because a package is advertised. Choose tests that answer a care question. Prediabetes is an opportunity to improve habits and follow up; it does not mean progression is inevitable. Use the workbook to organise facts, not to label yourself.

Download this article’s free workbook

Download the PDF workbook and complete the activities

Organise results and agree a testing plan with your clinician.

Continue with CR-DM499

Explore the published course: Diabetes: A Full Explanation to a Common Man

Use the published course for structured learning. Check the Academy for current fees and enrollment details. Education supports your clinician’s care; remission is not guaranteed.

Explore the diabetes series in other languages

Sources and further reading

• NIDDK Diabetes tests and diagnosis
• NIDDK The A1C test

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