The screening is based on fasting glucose in the laboratory, except during pregnancy when a particular test is necessary. There is no French recommendations on screening procedures, but the U.S. ADA (American Diabetes Association) recommends screening every three years:
- in people 20 to 44 with high weight and sedentary
- in people 45 to 64 with a high weight or sedentary
- among those over 65 with high weight, or a first degree relative with type 2 diabetes or in women who have given birth to a baby weighing over 4 kg.
These criteria selected 31% of the general population in which screening would be more likely to be positive, which would be a big saving compared to routine screening in all individuals, but the sensitivity of these criteria would be only 79 %, which means that 21% of diabetics true escape nonetheless screening. However, diabetics who are not obese or sedentary probably have less cardiovascular risk.
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