Table 2.

CSF pressure in patients with chronic daily headache grouped according to MR venography findings and in control subjects

Subject dataCDH
Group 1 (normal MRV, n = 27)Group 2 (unilateral* CVT, n = 6)Group 3 (bilateral CVT, n = 5)Controls (normal MRV, n = 28)
Differences in CSF values between groups were adjusted for age, sex, and body mass index; p values were corrected for multiple testing (see Methods).
* Absent flow within one transverse sinus.
† Absent flow within both transverse sinuses.
p = 0.04 compared with Group 2 and p < 0.001 compared with Group 3.
§ p = 0.03 compared with Group 3 and p < 0.001 compared with controls.
p < 0.001 compared with controls.
CDH = chronic daily headache; MRV = MR venography; CVT = cerebral venous thrombosis.
Age, y, mean ± SD42.1 ± 10.842.5 ± 14.638.6 ± 1040.8 ± 14.1
Sex, F/M21/65/15/013/15
Body mass index, mean ± SD26.3 ± 5.431.1 ± 5.231.8 ± 7.626.9 ± 5.0
CSF pressure, mmH2O, mean ± SD120.2 ± 41.3185.7 ± 24.9§255.6 ± 52119.3 ± 28.8