Trends in Multiple Chronic Conditions Among US Adults, By Life Stage, Behavioral Risk Factor Surveillance System, 2013-2023

Introduction Chronic conditions are costly and major causes of death and disability. Addressing conditions earlier in adulthood can slow disease progression and improve well-being across the lifespan. We estimated, by life stage, 10-year trends among US adults in the prevalence of 1 or more chronic conditions, multiple chronic conditions (MCC; >= 2 conditions), and 12 selected chronic conditions. Methods We analyzed data from the 2013-2023 (odd years) Behavioral Risk Factor Surveillance System (N = 2,673,529). We estimated the prevalence of 1 or more conditions, MCC, and each of 12 conditions, by life stage: young (18-34 y), midlife (35-64 y), and older (>= 65 y) adults. We used polynomial contrasts to analyze 10-year trends. Results In 2023, 76.4% (representing 194 million) of US adults reported 1 or more chronic conditions, including 59.5%, 78.4%, and 93.0% of young, midlife, and older adults, respectively. Moreover, 51.4% (representing 130 million) of US adults reported MCC, including 27.1%, 52.7%, and 78.8% of young, midlife, and older adults, respectively. Among young adults, from 2013 to 2023, prevalence increased significantly from 52.5% to 59.5% for 1 or more conditions and from 21.8% to 27.1% for MCC. Conclusion Approximately 6 in 10 young, 8 in 10 midlife, and 9 in 10 older US adults report 1 or more chronic conditions. Trends in conditions worsened among young adults during 2013-2023. Recognizing the burden of chronic disease throughout life stages, especially earlier in life, practitioners and partners may consider prevention and management approaches critical for addressing costs, care, and health outcomes. Practitioners may also consider tailoring these approaches to unique roles, transitions, and challenges in different life stages.