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Eight chronic conditions increase COVID-19 hospitalization risk, with older age being the primary factor. These findings help identify high-risk populations for targeted prevention and treatment strategies.

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Area of Science:

  • Public Health
  • Epidemiology
  • Infectious Disease Epidemiology

Background:

  • Early COVID-19 pandemic data identified chronic conditions linked to hospitalization when population immunity was low.
  • Updated risk factor information for COVID-19 hospitalization is crucial for current public health strategies.

Purpose of the Study:

  • To assess the association between nine specific chronic conditions and COVID-19 hospitalization rates in adults.
  • To identify the most significant risk factors for severe COVID-19 outcomes, including age and chronic health conditions.

Main Methods:

  • Combined surveillance and survey data from 98 counties across 13 states (October 2022-September 2023).
  • Compared COVID-19 hospitalization rates in adults with and without specific chronic conditions using U.S. Census and Behavioral Risk Factor Surveillance System data.
  • Employed Poisson regression with Monte Carlo simulation to estimate adjusted rate ratios (aRRs), controlling for age, sex, race, and ethnicity.

Main Results:

  • Eight of nine chronic conditions (including chronic kidney disease, diabetes, stroke, severe obesity, coronary artery disease, COPD, smoking, and asthma) were associated with increased COVID-19 hospitalization risk.
  • Older adults (≥75 years) had hospitalization rates 18.0 times higher than younger adults (18-49 years), with age being the strongest risk factor.
  • The 2022-2023 season saw a higher proportion of hospitalized adults with multiple chronic conditions (≥3) and aged ≥75 years compared to 2020-2022.

Conclusions:

  • Chronic conditions and older age significantly elevate the risk of COVID-19 hospitalization.
  • Understanding these risk factors is vital for developing effective public health interventions and clinical management strategies.
  • Targeted prevention efforts for high-risk groups, particularly older adults with chronic conditions, are recommended.