Fig. 1.

Age-adjusted* active epilepsy^† prevalence by age group, sex, race/ethnicity, and educational status among adults—United States, 2021 National Health Interview Survey^§ Abbreviations: GED = General Educational Development; HS = high school. *Age-adjusted to the 2000 U.S. projected population aged ≥18 years using three age groups: 18–44, 45–64, and ≥65 years. All prevalence estimates are age-adjusted except those for age groups. ^†Active epilepsy was defined as self-reported doctor-diagnosed epilepsy and either taking medication, having had one or more seizures in the past year, or both. ^§Error bars represent 95% confidence intervals. ^¶Persons identified as Hispanic might be of any race. The four racial/ethnic categories are mutually exclusive. ^**Non-overlapping 95% confidence intervals were used to assess statistically significant differences between subgroups. Age-adjusted prevalence of active epilepsy was lower among adults with at least some college education compared with those with less education.