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Purpose To investigate the effects of patient-induced artifacts on the diagnostic performance of the COVID-19 Reporting and Data System (CO-RADS) and the computed tomography chest severity score (CT-SS).

Methods A single-center retrospective analysis of patients aged 18 years and older who were admitted to the authors’ hospital with laboratory-confirmed COVID-19 and underwent chest CT between July and November 2021 was conducted. Patients’ chest CT scans were examined by 3 radiologists for CT-SS and CO-RADS classifications. Patient-based artifacts, including metal artifacts, incomplete projection artifacts, motion artifacts, and insufficient inspiration, were identified by 3 readers who were unaware of each other. For statistical analysis, interreader agreement was investigated using Fleiss kappa (Graphic) agreement analysis.

Results The study population included 549 patients with a median age of …