Table 2.

Meta-regression results for the COVID-19 infection outcome

Moderator	Meta-regression				R2 Analog (proportion of variance explained) %
	Slope	95% CI		p-value
Sample size	1.75 $\times$ 10–8	1.38 $\times$ 10–8	2.11 $\times$ 10–8	< 0.001	100
NOS score	0.331	− 0.621	1.283	0.496	0.00
Publication year	0.676	− 0.869	2.221	0.391	0.00
Male Percentage	− 0.024	− 0.143	0.095	0.697	0.00

NOS new-castle ottawa scale, CI confidence interval