Table 2.

Data for CSF production rate in normal pressure hydrocephalus and decompensated longstanding overt ventriculomegaly

Disease studied	Number of patients	Male:female	Average age	Average net PRcsf	p value	ICP before the study	ICP during study	ICP after the study	Pre-assessment CSF diversion devices in situ	Post-assessment CSF diversion devices in situ
NPH	41	22:19	77	55–82ml/h	(p<0.0001)	7–11	−5 to 2	7–11	0	38
LOVA	4	1:3	55	58–79ml/h	(p<0.0001)	5–12	−2 to 3	5–12	0	4