Table 1.

Characteristics of 20 patients diagnosed with chronic fatigue syndrome who had lumbar puncture.

CSF pressure (cm H2O)	BMI (kg/m2)	Sex	Age	Length of history (years)
41*	36	F	40	1.5
29*	31	M	53	6
25*	27	M	60	10
22*	22	M	21	3
21	39	F	46	2.5
20	27	F	22	5
20	30	M	39	5
20	36	F	49	11
19	31	F	26	13
19	23	F	16	0.5
17	18	F	20	0.8
17	30	F	22	8
17	31	M	18	0.8
15	23	M	62	15
15	26	M	47	0.5
14	20	F	23	12
14	21	F	27	9
12	23	F	47	30
12	27	F	22	3
12	22	F	41	12

BMI: body mass index (normal, 18.5–25; overweight, 25–30; obese >30).

^*Match ICHD-2 criteria for IIH.