Risk of COVID-19 infection and the associated hospitalization, ICU admission and mortality in opioid use disorder: a systematic review and meta-analysis

Table 2 Meta-regression results for the COVID-19 infection outcome

Moderator	Meta-regression				R² Analog (proportion of variance explained) %
Moderator	Slope	95% CI		p-value	R² Analog (proportion of variance explained) %
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

ISSN: 1940-0640