The quality of COVID-19 systematic reviews during the coronavirus 2019 pandemic: an exploratory comparison.

These results suggest COVID-19 and COVID-19-unrelated SRs published during the pandemic are equally of low quality. SRs published during the pandemic were generally lower quality compared with SRs published pre-pandemic irrespective of COVID-19 focus. Moreover, SR quality in general is seriously lacking, and considerable efforts need to be made to substantially improve the quality and rigour of the SR process.