Trends and Disparities in Pneumonia-Related Mortality in the U.S. Population: A Nationwide Analysis Using the CDC WONDER Data

Background Pneumonia remains a significant health concern, particularly affecting older adults, individuals with chronic conditions, and underserved populations. The analysis of pneumonia-related mortality rates based on age groupings and sex affiliation and ethnicity, and geographic region strength is vital because it directs spending distribution and helps design tailored prevention methods for vulnerable patient populations. This study analyzes nationwide trends that can help identify high-risk populations and inform targeted public health interventions. Methods Age-adjusted pneumonia mortality rates were computed from CDC WONDER data, which spanned from 1999 until 2023 through direct standardization to the 2000 U.S. standard population and expressed per 100,000 population. The average annual percent change was estimated using log-linear regression. Subgroup disparities were assessed by calculating rate ratios with 95% confidence intervals. Two-sided p-values less than 0.05, based on chi-square tests, were used to evaluate differences across sex, racial/ethnic groups, and yearly trends. Results From 1999 to 2023, the age-adjusted pneumonia mortality rate declined from 22.9 to 9.9 per 100,000 population (p < 0.05). Although both sexes experienced reductions (p < 0.05), males consistently had higher mortality (p < 0.05). Black or African American individuals had higher rates than other groups (p < 0.05), despite overall improvements. Mortality increased with age, peaking among those ≥85 years (p < 0.05). Hispanic individuals had consistently lower rates than non-Hispanics(p = 0.05). A spike in mortality occurred in 2020 during the COVID-19 pandemic (p < 0.05), followed by stabilization. Conclusion Despite significant declines in pneumonia-related mortality over the past two decades, disparities remain by sex, age, race, and ethnicity. Older adults, males, and Black individuals continue to bear a disproportionate burden. The temporary COVID-19-related increase emphasizes the need for sustained public health focus. Targeted strategies are crucial to address persistent inequities and reduce pneumonia-related deaths further.