Table 3.

Overall categorical and moderator analysis within the globus pallidus.

Moderator	k	N	Mean weighted effect size (d)	95% CI for d		Mean Weighted (r)	Homogeneity Tests
Moderator	k	N	Mean weighted effect size (d)	95% CI for d		Mean Weighted (r)	(Q_b)^a	(Q_w)^b
Overall	14	782	0.61	0.50	0.72	0.29		93.68 ^*

Method							10.18 ^*
R2^*	3	193	0.79	0.58	1.00	0.37		55.73 ^*
R2	3	153	0.29	0.01	0.56	0.14		1.13
FDRI	6	258	0.53	0.34	0.72	0.26		8.44
Phase	2	178	0.73	0.51	0.94	0.34		18.20 ^*

Design							0.03
Grouped	5	155	0.58	0.26	0.91	0.28		1.25
Continuous	9	627	0.61	0.50	0.73	0.29		92.40 ^*

Note: All effect sizes are significant, as 95% CI do not include zero. ‘k’ is the number of effect sizes included in the analysis, and N represents the cumulative sample size across studies.

indicates significance at p < 0.05.

effect size differs by moderator.

heterogeneity across studies within moderator class.