Risk factors for detection failures of chest radiography in diagnosing pneumonia.

Background: Little is known about clinical factors associated with undetectable pneumonic shadows on chest radiographs (CRs) for diagnosing pneumonia in the primary care setting.

Methods: A retrospective assessment of CRs was conducted to compare chest computed tomography (CT) images of patients admitted to Kesennuma City Motoyoshi Municipal Hospital who were diagnosed with pneumonia from April 2014 to June 2016.

Results: Eighty-three patients were included, and their average age was 83.