Table 2.

Reference vales for intracranial pressure and lumbar cerebrospinal fluid pressure in different body positions

	No. of studies	No. of participants	Mean (reference interval) [mmHg]	Mean (reference interval) [cmH2O]
ICP
Supine	6	62	8.6 (0.9–16.3)	11.7 (1.2–22.2)
Upright	6	62	1.0 (– 5.9 to 8.3)	1.3 (− 8.7–11.2)
Daytime	2	45	− 0.1 (− 12.0–12.2)	− 0.15 (− 16.3–16.6)
Nighttime	3	57	6.3 (-15.8–28.2)	8.6 (-21.5–38.3)
CSFop
Supine	7	389	10.7 (5.7–15.5)	14.4 (7.5–21.1)
Lateral recumbent	21	13,359	11.9 (7.2–16.8)	16.3 (9.8–22.8)