Prediabetes

When a person has prediabetes, their blood sugar levels are higher than normal but not high enough for a diabetes diagnosis. Prediabetes can increase a person’s risk of developing type 2 diabetes, heart disease, and stroke. CDC estimates that 88 million, or 1 in 3, US adults aged 18 years or older had prediabetes in 2018. This number includes about 35 million adults aged 45 to 64 years and 24 million aged 65 years or older.

Although an estimated one-third of US adults had prediabetes in 2018, only 15.3% were aware of it. Trends in the prevalence of prediabetes among US adults remained constant from 2005 to 2016. However, the percentage with prediabetes who had ever been told by a health care professional that they had prediabetes (awareness) has doubled (Figure 6).12 Table 2 shows the percentage of US adults by state or US territory who said they had ever been told by a health care professional that they had prediabetes.

Figure 6. Trends in Age-Adjusted Prevalence and Awareness of Prediabetes Among US Adults Aged 18 Years or Older, 2005–2016

This horizontal line graph uses 2 lines to show the prevalence and awareness trends of prediabetes among US adults aged 18 years or older from 2005 to 2016. The vertical Y-axis presents percentages from 0% to 40% in increments of 5. The horizontal X-axis presents the time period in 3-year spans. Prevalence remained constant, ranging from 33.6% in 2005–2008 to 33.3% in 2013–2016. Awareness doubled, from 6.5% in 2005–2008 to 13.3% in 2013–2016.

Notes: Prediabetes awareness was based on self-report and estimated only among adults with prediabetes. Prediabetes was defined as fasting plasma glucose values of 100–125 mg/dL or hemoglobin A1C values of 5.7%–6.4%. Time periods overlap and are moving averages, with two survey periods each. Figure adapted from CDC’s National Diabetes Statistics Report 2020.
Data source: CDC’s National Health and Nutrition Examination Survey, 2005–2016.

Table 2. Percentage of US Adults Who Had Ever Been Told by a Health Care Professional That They Had Prediabetes, 2016
State or Territory Percentage
Mediana 7.4
Alabama 6.7
Alaska 10.5
Arizonab 7.6
Arkansasc 5.4
Californiab 8.2
Coloradob 6.3
Connecticut 7.3
Delaware 10.8
District of Columbia 10.8
Florida 8.7
Georgiad 6.8
Guam 15.6
Hawaiib 14.0
Idaho 7.3
Illinois 7.3
Indianab 6.4
Iowa 6.5
Kansas 6.5
Kentucky 7.7
Louisiana 6.9
Maine 7.4
Marylandb 8.4
Massachusetts 7.2
Michiganb 6.8
Minnesotab 6.2
Mississippi 6.9
Missourib 6.9
Montanac 5.8
Nebraska 5.6
Nevada 9.5
New Hampshirec 5.5
New Jerseyb 7.4
New Mexico 9.0
New York 8.1
North Carolinad 7.2
North Dakotab 6.1
Ohio 6.7
Oklahoma 7.4
Oregon 8.8
Pennsylvaniab 6.0
Puerto Rico 9.6
Rhode Islandb 5.7
South Carolina 7.5
South Dakota 6.4
Tennesseed 7.3
Texas 9.7
Utahc 5.7
Vermontb 4.8
US Virgin Islands 10.8
Virginia 9.0
Washingtonb 7.0
West Virginia 8.5
Wisconsin 6.5
Wyomingb 5.5

Note: Percentages are age-adjusted to the 2000 US standard population.
Data sources: CDC’s United States Diabetes Surveillance System and Behavioral Risk Factor Surveillance System.
a State median calculated with 2016 data only.
b Data from 16 states are from 2014 because 2015 and 2016 data were not available.
c Data from 4 states are from 2013 because 2014, 2015, and 2016 data were not available.
d Data from 3 states are from 2015 because 2016 data were not available.

Page last reviewed: February 11, 2021