Table 2.

Changes in intracranial pressure resulting from altering position

Position change	ICP change mean (SD) (mmHg)	Mean percentage change (%)	p= (paired t-test)
Supine to LP	2.8 (4.0)	13%	0.028*
Supine to standing	-10.9 (4.2)	-51%	0.0001****
Sitting to standing	0.2 (3.8)	2%	0.82
Standing vs. ambulatory recording	-1.3 (1.1)	3%	0.39

ICP indicates intracranial pressure, SD indicates standard deviation, LP indicates lateral decubitus position, * indicates p = < 0.05, **** indicates p = < 0.0001