The American Diabetes Association has a test that has been validated to identify people who are high risk for having undiagnosed diabetes. If you have a brother or sister with diabetes, or parent, score one point. If your weight is even modestly elevated, you score five points. There is a weight and body mass index chart that people can find at the ADA web site. For instance, if you are five foot ten without shoes, and weigh 188 lbs, or more, you score five points.
Age is a risk factor.
If you are over 65, ta-da, you score 9 points. If you are between 45 and 64, you score five points. If you are under 65, and get very little exercise, you score five points. If you take that test, and score ten points or more, you are at high risk of having, or developing diabetes, and should check with your physician. Thus, in using this test for screening, if you are sedentary, that's five points, and modestly over weight, that's five points, your risk is 10.