Data, Surveillance, and Epidemiology

Graph showing the percent of adults diagnosed with diabetes, Montana and US. Graph shows the increasing trend of diagnosed diabetes in both the US* and MT**. The US rate is higher than MT with a trend from 7.3% in 2005 to 11% in 2018. MT increased from 5.7% in 2005 to 9.3% in 2018. Data source: Behavioral Risk Factor Surveillance System. *Nationwide (States and DC). National data for 2014 are not available. **Due to changes in survey methodology, starting in 2011, estimates can no longer be compared to estimates from previous years. All years going forward from 2011 can be compared to one another.

How common is diabetes and prediabetes?


  • About 64,000 Montana adults currently have diagnosed diabetes.1
  • The percentage of Montana adults with diagnosed diabetes increased from 2.9% in 1990 to 6.4% in 2019.1
  • Diabetes is more common among American Indians/Alaska Natives adults than white, non-Hispanics adults in Montana. In 2019, 14.9% of American Indian/Alaska Natives adults in Montana reporting having diagnosed diabetes compared to 5.8% of white non-Hispanics adults.1
  • Across the US, the number of people diagnosed with diabetes increased from 1.5 million in 1958 to 26.9 million in 2018.2
  • Annual Diabetes in Montana Infographic.


  • In 2017, 7.4% of Montana adults reported having prediabetes.1
  • Many more adults are estimated to have prediabetes, but not know it. In Montana, it is estimated that over 1 in 3 (37.4%) adults have prediabetes.3
  • Across the US, it is estimated that 88 million adults (34.5% of the adult US population) aged 18 years or older have prediabetes.2

Data sources:

  1. Montana Behavioral Risk Factor Surveillance System 1990-2019. Note: These data are age-adjusted to the 2000 projected U.S. population, distribution #9, as documented in “Age Adjustment Using the 2000 Projected U.S. Population” of the Healthy People Statistical Notes, by Klein and Schoenborn.
  2. Centers for Disease Control and Prevention National Diabetes Statistics Report 2020.
  3. 2017 state undiagnosed diabetes prevalence, Dall et al., “The Economic Burden of Elevated Blood Glucose Levels in 2017”, Diabetes Care, September 2019, vol. 42.


What data sources inform us about pre-diabetes and diabetes?

The Montana Diabetes Program uses variety of data for diabetes surveillance and evaluation, reports, grant reporting, and to direct program decisions to reduce the prevalence of diabetes, the morbidity from diabetes, and the development of complications of diabetes among Montana residents. A list of data sets used is included below, and you can access the Public Health Data Resource Guide to learn more about them. Data sets do not contain information that can identify individuals.

  • Behavioral Risk Factor Surveillance System (BRFSS)
  • Birth and Death Records
  • Montana Hospital and Emergency Department Discharge Data System
  • Electronic Diabetes Quality Care Monitoring System (E-DQCMS)
    • The E-DQCMS is a diabetes patient registry to support quality improvement (QI) in primary care and diabetes self-management education programs. This program tracks outcomes for diabetes management including A1C, blood pressure, cholesterol levels, tobacco cessation, immunizations, chronic kidney disease, foot care, and medication. See the quarterly QI reports for more information.
  • Centers for Disease Control and Prevention (CDC)
  • Centers for Medicare and Medicaid (CMS)
    • The CMS provides information on the prevalence, utilization, and Medicare spending for beneficiaries with chronic conditions, including diabetes. The agency produced the Medicare Chronic Conditions Dashboard where data can be viewed by region, state and county.
  • American Diabetes Association (ADA)



Surveillance Reports

These reports aim to increase the understanding of data related to diabetes prevention, education, and management as well as provides clinical recommendation to the health care community.

Evaluation Reports

These reports are evaluations done by the Montana Diabetes program related to diabetes in Montana. 

Special Reports and Presentations

The Montana Diabetes Program staff often participate in regional and national conferences and share data related to diabetes and its complications in oral and poster presentations.  These reports and presentation cover variety of topics related to diabetes. Please contact the MDP to inquire about what other data may be available.

Questions and comments on data, surveillance, and epidemiology can be sent to our Epidemiologist and Informatics Specialist.