Trends in Health Equity in the United States by Race/Ethnicity, Sex, and Income, 1993-2017

Key Points

Question

Has health equity improved or worsened during the past 25 years in the United States among working-aged adults?

Findings

Using data from more than 5.4 million respondents to the Centers for Disease Control and Prevention’s Behavioral Risk Factor Surveillance System, this study found that from 1993 to 2017, the black-white gap showed significant improvement. However, measures of health equity and health justice declined over time, and income disparities worsened.

Meaning

Meaningful progress on health equity in the United States will require greater effort, new approaches, or both.

Abstract

This survey study uses data from over 5.4 million US working-aged adults to assess trends in health equity and health justice by sex, race/ethnicity, and income across the past 25 years.

Abstract

Importance

Health equity is an often-cited goal of public health, included among the 4 overarching goals of the Department of Health and Human Services’ Healthy People 2020. Yet it is difficult to find summary assessments of national progress toward this goal.

Objectives

To identify variation in several measures of health equity from 1993 to 2017 in the United States and to test whether there are significant time trends.

Design, Setting, and Participants

Survey study using 25 years of data, from January 1, 1993, to December 31, 2017, from the Centers for Disease Control and Prevention’s Behavioral Risk Factor Surveillance System to assess trends in health equity and health justice by race/ethnicity, sex, and income in 3 categories by year.

Main Outcomes and Measures

Health equity was assessed separately for each of 2 health constructs: healthy days—the average of physical and mental healthy days over the previous 30 days—and general health in 5 categories, rescaled to approximate a continuous variable. For each health construct, average health was calculated along with 4 measures of health equity: disparities across 3 income groups; black-white disparities; health justice—a measure of the correlation of health outcomes with income, race/ethnicity and sex; and a summary health equity metric.

Results

Among the 5 456 006 respondents, the mean (SD) age was 44.5 (12.7) years; 3 178 688 (58.3%) were female; 4 163 945 (76.3%) were non-Latinx white; 474 855 (8.7%) were non-Latinx black; 419 542 (7.7%) were Latinx; and 397 664 (7.3%) were of other race/ethnicity. The final sample included 5 456 006 respondents for self-reported health and 5 349 527 respondents for healthy days. During the 25-year period, the black-white gap showed significant improvement (year coefficient: healthy days, 0.021; 97.5% CI, 0.012 to 0.029; P < .001; self-reported health, 0.030; 97.5% CI, 0.025 to 0.035; P < .001). The health equity metric for self-reported health showed no significant trend. For healthy days, the Health Equity Metric declined over time (year coefficient: healthy days, −0.025; 97.5% CI, −0.033 to −0.017; P < .001). Health justice declined over time (year coefficient: healthy days, −0.045; 97.5% CI, −0.053 to −0.038; P < .001; self-reported health, −0.035; 97.5% CI, −0.046 to−0.023; P < .001), and income disparities worsened (year coefficient: healthy days, −0.060; 97.5% CI, −0.076 to −0.044; P < .001; self-reported health, −0.029; 97.5% CI, −0.046 to −0.012; P < .001).

Conclusions and Relevance

Results of this analysis suggest that there has been a clear lack of progress on health equity during the past 25 years in the United States. Achieving widely shared goals of improving health equity will require greater effort from public health policy makers, along with their partners in medicine and the sectors that contribute to the social determinants of health.