Table 3. Summary of meta-regression analyses of online MBIs effect on mental health outcomes at post-intervention (including outliers).

Outcome Measure	Covariate	Number of Studies	Z	p-value
Depression	Mean age	5	-0.29	0.77
	% female	5	-0.20	0.84
	Number of sessions	5	0.49	0.63
	Length of intervention	5	-0.59	0.55
Anxiety	Mean age	6	-0.37	0.71
	% female	6	-0.06	0.95
	Number of sessions	6	-1.21	0.23
	Length of intervention	6	-2.09	0.04a
Stress	Mean age	4	-2.23	0.03a
	% female	4	-1.36	0.17
	Number of sessions	5	-1.38	0.17
	Length of intervention	5	-1.38	0.17

^a p < 0.05