Table 1.

Effect sizes of dependent variables.

Dependent variable	n	Effect size	I2 (%)	95% CI
				LL	UL
Overall	52	0.65	96.9	0.39	0.91
GI-T	14	0.56	96.8	0.23	0.89
GI-S	15	0.52	96.7	0.01	1.02
ATG-T	11	1.06	97.9	0.17	1.95
ATG-S	12	0.56	96.6	0.22	0.91