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Prediabetes in Adults

For more information on prediabetes in Michigan, please view our prediabetes fact sheet.


  Frequency in 100 95% Confidence Interval
Had a Fasting Blood Glucose test in the past 3 years 58.4 (55.6-61.3)


  Frequency in 100 95% Confidence Interval
Told by a doctor has prediabetes 6.4 (5.3-7.6)
Data Source: 2010 Michigan Behavioral Risk Factor Surveillance System. Bureau of Epidemiology, Division of Genomics, Perinatal Health and Chronic Disease Epidemiology, Michigan Department of Community Health.

Methods and Limitations: The Michigan Behavioral Risk Factor Surveillance System (MI BRFSS) comprises annual, state-level telephone surveys of the non-institutionalized adult population, 18 years and older. The MI BRFSS provides self-reported information on behavioral risk factors for disease and on preventive health practices within the state. The data are limited by potential recall bias and may be under- or over- reported. Validity of self-reported glucose testing has not been measured.

Prediabetes Awareness Indicator: Respondents were considered to have prediabetes if they answered "yes" to the question "Has a doctor ever told you that you have prediabetes?" or "no, prediabetes or borderline" to the question "Has a doctor ever told you that you have diabetes?" Since self-reported prediabetes is low compared to estimates from laboratory data, this measure is considered a gauge of disease awareness.


There is no state surveillance of prediabetes. The best information available is from a national study, the National Health and Nutrition Examination Survey (NHANES). NHANES uses mobile labs to collect blood specimens for fasting blood glucose tests; therefore, the prediabetes prevalence estimates encompass both diagnosed and undiagnosed cases. Nationally, only 7.3% of people were aware of their prediabetes status (Geiss et al. Am J of Prev Med, April 2010). The prevalence rates published in the public domain are reprinted here (in abbreviated format).

For more information on national estimates of prediabetes prevalence, please see the full publication:

Cowie CC, Rust KF, Ford ES, Eberhardt MS, Byrd-Holt DD, Li C, Williams DE, Gregg EW, Bainbridge KE, Saydah SH, Geiss LS. Full Accounting of Diabetes and Pre-Diabetes in the U.S. Population in 1988-1994 and 2005-2006. Diabetes Care 32:287-294, 2009.
"Table 2. Crude and standardized prevalence of pre-diabetes,
NHANES 2005-2006 (age ≥20 years)."
  Crude Standardized*
Frequency in
95% Confidence
Frequency in
95% Confidence

Total Prevalence

29.5 (26.2-32.7) 29.0 (26.4-31.6)

Age Group


17.9 (14.1-21.8) 17.8 (13.9-21.7)


34.6 (28.2-41.0) 34.5 (28.2-40.8)


36.8 (30.2-43.4) 37.4 (30.7-44.2)


46.7 (38.7-54.6) 46.8 (39.0-54.6)



36.0 (30.8-41.2) 35.7 (31.3-40.2)


23.4 (20.6-26.3) 22.8 (19.8-25.8)


White, non-Hispanic

29.3 (25.1-33.6) 27.7 (24.4-31.0)

Black, non-Hispanic

25.1 (22.0-28.1) 25.4 (22.5-28.2)


31.7 (24.7-38.7) 32.0 (26.5-37.4)





* Estimates for total prevalence and race/ethnicity groups were age and sex standardized, estimates for age groups were sex standardized, and estimates for sex groups were age standardized (all using the 2000 U.S. Census population).