Completeness of reporting for COVID-19 case reports, January to April 2020: a meta-epidemiologic study.

Background: The quality of case reports, which are often the first reported evidence for a disease, may be negatively affected by a rush to publication early in a pandemic. We aimed to determine the completeness of reporting (COR) for case reports published on coronavirus disease 2019 (COVID-19).

Methods: We conducted a systematic search of the PubMed database for all single-patient case reports of confirmed COVID-19 published from Jan.