ArticleKorean journal of radiology2025
Impact of Increased Chest CT Utilization on the Diagnosis of Pneumonia in Older Adults: A Population-Based Study of 930,654 Individuals.
Article in Korean journal of radiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Comments on "Refining the Analytical Framework Linking CT Utilization and Pneumonia Incidence in Older Adults".Korean journal of radiology · 2026Article
- Response to Comments on "Refining the Analytical Framework Linking CT Utilization and Pneumonia Incidence in Older Adults".Korean journal of radiology · 2026Article
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1 author.
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Abstract
objectiveThe trends in chest computed tomography (CT) utilization among patients with pneumonia and its association with pneumonia incidence and mortality remain unclear. This study aimed to investigate these trends and their associations in older adults. MATERIALS AND
methodsWe conducted a retrospective analysis of a Korean population aged 61-81 years at each calendar year between 2009 and 2018, using data from the government-provided National Health Insurance claims database (annual cohort size: 511,931-725,843 individuals). For each calendar year, we evaluated population-level, age- and sex-standardized pneumonia incidence and mortality rates; age- and sex-standardized frequency of chest CT acquisition, and 30-day mortality among patients with pneumonia. Pneumonia severity was categorized based on hospitalization and use of supplemental oxygen therapy. Incidence and mortality rates of pneumonia with and without chest CT were also evaluated for each severity subtype.
resultsThe age- and sex-standardized incidence rate of pneumonia increased from 27.7 to 29.4 per 1,000 person-years between 2009 and 2018. Incidence rate of pneumonia with chest CT increased from 3.7 to 5.9 per 1,000 person-years, whereas incidence rate of pneumonia without chest CT remained stable (24.1 to 23.4 per 1,000 person-years). The frequency of chest CT acquisition among patients with pneumonia rose from 13.4% to 20.4%, regardless of severity. Over the same period, the age- and sex-standardized pneumonia mortality rate decreased from 51.9 to 44.2 per 100,000 person-years, and 30-day mortality among patients with pneumonia declined from 2.1% to 1.7%, regardless of severity.
conclusionChest CT acquisition among older Korean patients with pneumonia increased steadily between 2009 and 2018. The population-level pneumonia incidence also increased, mainly in pneumonia diagnosed with chest CT acquisition. Further research is needed to assess the potential impact of increased chest CT utilization on mortality and the risk of overdiagnosis.
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