Diabetes Prevalence and Incidence Inequality Trends Among US Adults, 2008–2021

This study examined national trends in age, sex, racial and ethnic, and socioeconomic inequalities for diagnosed diabetes prevalence and incidence among US adults from 2008-2021. Adults (≥18 years) were from the National Health Interview Survey (2008-2021). The annual between-group variance (BGV) for sex, race, and ethnicity, and the slope index of inequality (SII) for age, education, and poverty-to-income ratio (PIR) along with the average annual percent change (AAPC) were estimated in 2023 to assess trends in inequalities over time in diabetes prevalence and incidence. For BGV and SII, a value of 0 represents no inequality while a value further from 0 represents greater inequality. On average over time, PIR inequalities in diabetes prevalence worsened (SII: -8.24 in 2008 and -9.80 in 2021; AAPC for SII: -1.90%, p=0.003) while inequalities in incidence for age (SII: 17.60 in 2008 and 8.85 in 2021; AAPC for SII: -6.47%, p