Meta-analysis
According to the mean differences of Ct values, 4 studies were included in meta-analysis [Forest plot of meta-analysis of the effect of PVP-I mouthwash on Cycle threshold value of SARS-COV-2The meta-analysis of the effect of CHX mouthwash on Ct value of SARS-COV-2, which included studies conducted by Yoon, Seneviratne and Eduardo [Forest plot of meta-analysis of the effect of Chlorhexidine gluconate-containing mouthwash on Cycle threshold value of SARS-COV-2There were five subgroups of time in the meta-analysis of CPC-containing mouthwashes: 0–5 min, 30 min, 1 h, 3 h, 6 h after rinsing according to the studies conducted by Seneviratne and Eduardo [Forest plot of meta-analysis of the effect of CPC-containing mouthwash on Cycle threshold value of SARS-COV-2The Egger’s and Begg’s tests were used for publication bias assessment (Fig. Funnel plots based on Ct value changes. 