American Diabetes Association
Testing should be considered in all adults who are overweight (body mass index ≥ 25 kg per m2) and have additional risk factors:
	Physical inactivity
	First-degree relative with diabetes
	Members of high-risk ethnic populations
	Women who delivered a newborn weighing > 9 lb (4.1 kg) or were diagnosed with gestational diabetes
	Hypertension
	High-density lipoprotein cholesterol < 35 mg per dL (0.91 mmol per L) or triglyceride level > 250 mg per dL (2.82 mmol per L)
	Women with polycystic ovary syndrome
	Impaired glucose tolerance or impaired fasting glucose on previous tests
	Other clinical conditions associated with insulin resistance
History of cardiovascular disease
In the absence of the above criteria, testing for diabetes and prediabetes should begin at 45 years of age
If the results are normal, testing should be repeated at least at three-year intervals, with consideration of more frequent testing dependent on initial results and risk status
Pre-2008 U.S. Preventive Services Task Force
Screening for type 2 diabetes is recommended in adults with hypertension or hyperlipidemia
Evidence is insufficient to recommend for or against routinely screening asymptomatic adults for type 2 diabetes, impaired glucose tolerance, or impaired fasting glucose
2008 U.S. Preventive Services Task Force
Screening is recommended for asymptomatic adults with sustained blood pressure > 135/80 mm Hg
No recommendation for asymptomatic adults with blood pressure ≤ 135/80 mm Hg