2.2 Eligibility Criteria
All qualified studies were included in this meta-analysis. To be
included in the present meta-analysis, the article must have full filled
the following inclusion criteria: (a) an observational article reporting
COVID-19 and prevalence of NOAF; (b) studies with a sample size of ≥ 5
patients. These studies were included irrespective of the patient’s age,
gender, or ethnicity.
The following were the exclusion requirements: (a) lacking data on the
outcome of COVID-19, (b) duplicate publications, (c) letters to the
editor, case reports, commentaries, reviews, and posters.