Health / U.S. SOURCE RECORD
Adult obesity
Measured body mass index of at least 30, based on NHANES examination data. Pregnant participants are excluded.
Most recent reported period
40.3% of adults
Aug 2021 to Aug 2023 / survey-estimate
-1.6 pp versus 2017 to Mar 2020. Reporting types match and the two periods do not overlap. Numerical differences do not establish statistical significance.
Published history
2013 to 2014 to Aug 2021 to Aug 2023. The vertical scale follows the observed range. Lines connect published observations; the table gives exact periods and values. Missing values are unavailable, not zero.
| Period | Value | Status / notes | Original source |
|---|---|---|---|
| Aug 2021 to Aug 2023Aug 1, 2021 to Aug 31, 2023 | 40.3% | survey-estimateMeasured BMI at least 30; age adjusted, adults age 20 and older. Multi-year survey cycles, not annual observations. CDC reported no significant difference between the last two cycles. Standard errors are provided in the original table. Month boundaries describe reported collection months, not exact examination dates.Source standard error: 1.9 percentage points. | Source ↗ |
| 2017 to Mar 2020Jan 1, 2017 to Mar 31, 2020 | 41.9% | survey-estimateMeasured BMI at least 30; age adjusted, adults age 20 and older. Multi-year survey cycles, not annual observations. CDC reported no significant difference between the last two cycles. Standard errors are provided in the original table. Month boundaries describe reported collection months, not exact examination dates.Source standard error: 1.2 percentage points. | Source ↗ |
| 2015 to 2016Jan 1, 2015 to Dec 31, 2016 | 39.6% | survey-estimateMeasured BMI at least 30; age adjusted, adults age 20 and older. Multi-year survey cycles, not annual observations. CDC reported no significant difference between the last two cycles. Standard errors are provided in the original table. Month boundaries describe reported collection months, not exact examination dates.Source standard error: 1.6 percentage points. | Source ↗ |
| 2013 to 2014Jan 1, 2013 to Dec 31, 2014 | 37.7% | survey-estimateMeasured BMI at least 30; age adjusted, adults age 20 and older. Multi-year survey cycles, not annual observations. CDC reported no significant difference between the last two cycles. Standard errors are provided in the original table. Month boundaries describe reported collection months, not exact examination dates.Source standard error: 0.9 percentage points. | Source ↗ |
Definition and interpretation
Measured body mass index of at least 30, based on NHANES examination data. Pregnant participants are excluded.
U.S. civilian noninstitutionalized adults age 20 and older
Age adjusted to the 2000 U.S. population
CDC / National Center for Health Statistics
Oct 12, 2026 UTC
Limits of this measure
National survey estimate for the civilian noninstitutionalized population. Sampling uncertainty and survey changes matter. A numerical difference alone does not establish statistical significance or policy causation. BMI is a population screening measure with limitations. Measured NHANES estimates must not be replaced with self-reported NHIS or state BRFSS percentages.
Daily source checks do not create new daily observations. Figures may be revised, and timing does not establish administration causation. This record is informational and should not guide financial or medical decisions.
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