The quality of the reported sample size calculation in clinical trials on COVID-19 patients indexed in PubMed

Given the utmost priority of COVID-19 research, many medical journals, especially the leading ones, expedited the review process of these papers. It was expected that the amount of submitted papers for peer review would raise sharply and the deadline of the review period at the COVID-19 outbreak will be tightened. Therefore, sample size calculation of these papers, a component that was being omitted in more than 40% of the published randomized...