Table 3. Final iTBS regression model.

B-values for continuous IVs show the amount of increase in normalised MEP, for a one unit increase in the IV, after adjusting for all other variables in the model. i.e. a 1 unit increase in age (i.e. 1 year) resulted in a 0.18% reduction in iTBS-induced facilitation. For categorical IVs, the B-value shows the difference between the IV levels in normalised MEP. e.g. the APB muscle demonstrated 16.41% less iTBS-induced facilitation than the FDI muscle (see Figure 5 for all IV levels). Bold denotes significance (p < 0.05). Participants = 265; studies = 12.

IV	B	SE	95% CIs			ß	P
Age	−0.18	0.10	−0.38	-	0.02	−0.09	0.071
Baseline MEP	−10.93	2.73	−16.27	-	−5.58	−0.23	<0.001
Machine	5.63	5.91	−5.95	-	17.20	0.13	0.341
Muscle	−16.41	4.61	−25.44	-	−7.38	−0.37	<0.001
TBS intensity	4.94	6.09	−6.98	-	16.87	0.11	0.417
Neuronavigation use	−9.41	5.93	−2.21		21.02	−0.21	0.113