Table 4.

Subgroup analysis of adjustments made targeting the STN

	“+” setup	“x” setup	Stage move	P
	(n = 31)	(n = 15)	(n = 17)	value
x coordinate	0.29 (0.42)	0.51 (0.59)	0.16 (0.35)	0.52
y coordinate	0.42 (0.49)	0.50 (0.45)	0.35 (0.47)	0.48
Radial error	0.51 (0.69)	0.69 (0.67)	0.52 (0.42)	0.53

This table illustrates the median (IQR) errors found when targeting the subthalamic nucleus (STN) following adjustments using the “+” setup, after rotating the holder to its “x”-shaped setup or moving the head stage. n refers to the number of adjustments made per target. x and y coordinate errors are absolute errors. The largest numerical errors were found following moves performed by rotating the holder.