Understanding the WHO diabetes criteria is essential for anyone at risk of, or living with, diabetes. The World Health Organization (WHO) sets the global standards for diagnosing diabetes, helping doctors and patients around the world speak the same language when it comes to blood sugar levels and risk.
WHO Diabetes Criteria: How Is Diabetes Diagnosed?
The WHO diabetes criteria are based on specific blood glucose thresholds. These guidelines help identify diabetes, prediabetes, and normal blood sugar levels. Here are the main tests and their cut-offs:
- Fasting Plasma Glucose (FPG): Diabetes is diagnosed if your fasting blood sugar is ≥ 126 mg/dL (7.0 mmol/L) after not eating for at least 8 hours.
- Random Plasma Glucose: A value of ≥ 200 mg/dL (11.1 mmol/L) with symptoms (like increased thirst, urination, or unexplained weight loss) can indicate diabetes.
- Oral Glucose Tolerance Test (OGTT): After drinking a sugary solution, a 2-hour value of ≥ 200 mg/dL (11.1 mmol/L) confirms diabetes.
- HbA1c (A1C): An A1C of 6.5% or higher (48 mmol/mol) is also diagnostic.
WHO Criteria for Prediabetes
Prediabetes means your blood sugar is higher than normal, but not high enough for a diabetes diagnosis. According to WHO:
- Impaired Fasting Glucose (IFG): Fasting plasma glucose between 110–125 mg/dL (6.1–6.9 mmol/L)
- Impaired Glucose Tolerance (IGT): 2-hour OGTT value between 140–199 mg/dL (7.8–11.0 mmol/L)
- A1C: Some guidelines use 5.7–6.4% as a prediabetes range.
Why Do These Criteria Matter?
Clear diagnostic criteria help you and your healthcare team:
- Catch diabetes early—before complications develop
- Distinguish between prediabetes and diabetes for proper treatment
- Monitor your risk and set goals for blood sugar management
If you have risk factors like family history, high blood pressure, or are overweight, ask your doctor about getting tested. Early detection can make a big difference in your health and quality of life.
Related Questions
- What is a normal blood sugar level? For most people, fasting blood sugar should be below 100 mg/dL (5.6 mmol/L).
- How is prediabetes treated? Lifestyle changes like healthy eating, weight loss, and exercise are key. Some may need medication.
- What are the symptoms of diabetes? Common signs include frequent urination, excessive thirst, fatigue, and blurred vision.
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