Table 1.

CSF temporal properties measured in supine and upright position

Measurements	Group Average		%Change from Upright	Paired t-test (p-value)
	Upright	Supine
Heart rate (BPM)	76.09 ± 9.50	68.89 ± 10.83	− 9.5	8.43E−05
Systolic fractional duration (%Cycle)	30.9 ± 4.5	37.7 ± 6.4	22.6	1.89E−06
Diastolic fractional duration (%Cycle)	69.1 ± 4.5	62.3 ± 6.4	− 10.1	2.05E−06
Systolic duration (s)	0.25 ± 0.05	0.34 ± 0.08	36.0	1.06E−07
Diastolic duration (s)	0.55 ± 0.08	0.56 ± 0.12	1.8	0.78

Percentage change was calculated as follows: ((supine-upright)/upright)*100