Abstract
BackgroundLung cancer remains a leading cause of morbidity and mortality in the United States. Given the importance of epidemiological insight on lung cancer outcomes as the foundation for targeted interventions, we aimed to examine lung cancer death trends in the United States in the recent 22-year period, exploring demographic disparities and yearly mortality shifts. MethodsMortality information was obtained from the CDC Wide-ranging Online Data for Epidemiologic Research database from the years 1999–2020. Demographic information included age, sex, race or ethnicity, and area of residence. We performed log-linear regression models to assess temporal mortality shifts and calculated average annual percentage change (AAPC) and compared age-adjusted mortality rates (AAMR) across demographic subpopulations. ResultsA total of 3,380,830 lung cancer deaths were identified. The AAMR decreased from 55.4 in 1999-31.8 in 2020 (p<0.001). Males (AAMR 57.6) and non-Hispanic (NH) (AAMR 47.5) populations were disproportionately impacted compared to females (AAMR 36.0) and Hispanic (AAMR 19.1) populations, respectively. NH Black populations had the highest AAMR (48.5) despite an overall reduction in lung cancer deaths (AAPC −3.3 %) over the study period. Although non-metropolitan regions were affected by higher mortality rates, the annual decrease in mortality among metropolitan regions (AAPC −2.8 %, p<0.001) was greater compared to non-metropolitan regions (AAPC −1.7 %, p<0.001). Individuals living in the Western US (AAPC −3.4 %, p<0.001) experienced the greatest decline in lung cancer mortality compared to other US census regions. ConclusionsOur findings revealed lung cancer mortality inequalities in the US. By contextualizing these mortality shifts, we provide a larger framework of data-driven initiatives for societal and health policy changes for improving access to care, minimizing healthcare inequalities, and improving outcomes.
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