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    Area of Science:

    • Public Health
    • Healthcare Statistics
    • Epidemiology

    Background:

    • 140 million emergency department (ED) visits occurred in the United States in 2021.
    • A notable percentage of the population utilized ED services within a 12-month period.
    • Understanding ED utilization patterns is crucial for healthcare resource allocation and public health planning.

    Purpose of the Study:

    • To present comprehensive characteristics of emergency department visits in the United States for the year 2021.
    • To analyze ED visit data based on various demographic factors including age, sex, race, and ethnicity.
    • To examine the influence of insurance status and mentions of COVID-19 on ED utilization patterns.

    Main Methods:

    • Utilized data from the 2021 National Hospital Ambulatory Medical Care Survey (NHAMCS).
    • Analyzed emergency department visits across different age groups, sexes, racial and ethnic categories.
    • Included insurance information and the prevalence of COVID-19 mentions in the analysis.

    Main Results:

    • Detailed demographic breakdowns of the 140 million ED visits in 2021.
    • Insights into the frequency of ED visits among children and adults.
    • Analysis of how patient characteristics and COVID-19 influenced ED usage.

    Conclusions:

    • The study provides a detailed statistical overview of emergency department utilization in the US in 2021.
    • Findings highlight key demographic and health-related factors associated with ED visits.
    • This data can inform targeted public health interventions and healthcare service improvements.