Table 1:

Clinical characteristics of 18 patients with SIH

Patient No.	Age/Sex	Interval between Onset of Symptoms to Admission	Orthostatic Headache	Opening Pressure (cm H₂0)	Treatment
1	43/M	1 Month	−	7	EBP
2	63/F	4 Months	−	Negative	EBP
3	34/F	3 Days	+	Negative	Bed rest, intravenous hydration
4	34/F	19 Days	+	Negative	EBP
5	26/F	2 Days	+	Negative	Bed rest, intravenous hydration
6	53/F	1 Month	+	N.E.	Bed rest, intravenous hydration
7	24/F	2 Months	+	Negative	Bed rest, intravenous hydration
8	26/F	2 Months	+	9.7	Bed rest, intravenous hydration; EBP
9	45/M	1 Month	+	13.5	Drainage of CSDH, EBP
10	55/F	12 Days	+	Negative	EBP
11	48/F	1 Month	+	Negative	EBP
12	40/F	21 Days	+	Negative	EBP
13	35/F	1 Month	+	Negative	Bed rest, intravenous hydration; EBP
14	59/M	10 Days	+	Negative	Bed rest, intravenous hydration; EBP
15	64/M	1.5 Months	+	10	EBP
16	52/F	1 Month	+	3	EBP
17	61/F	1.5 Months	+	11	Drainage of CSDH, EBP
18	39/M	2 Days	+	0	EBP

Note:—cm H₂0 indicates centimeters of water; –, no; +. yes; N.E., not examined; EBP, epidural blood patch; CSDH, chronic subdural hematoma; SIH, spontaneous intracranial hypotension.