Table 1.

Demographic data

	CVT n = 39 (16.3%)	No CVT n = 200 (83.7%)	p
Age (y)	43.9	42.5	0.73
Sex			0.93
Males	12 (31%)	57 (29%)
Females	27 (69%)	143 (71%)
Imaging
MRI/MRA	30 (77%)	158 (79%)	0.94
CTA	12 (31%)	49 (24%)	0.62
Symptoms/History
Headaches	27 (69%)	145 (73%)	0.83
- acute (≤ 1day)	2 (5%)	34 (17%)	0.09
- subacte (> 1 day)	25 (64%)	111 (56%)	0.41
- unilateral	7 (18%)	30 (15%)	0.63
Seizure (focal or generalized)	11 (28%)	19 (10%)	0.003
Focal neurological deficit	17 (44%)	68 (34%)	0.33
Papilledema	4 (10%)	4 (4%)	0.15
Disturbed consciousness	0 (0%)	10 (5%)	0.32
Pregnancy*	3 (11%)	12 (8%)	0.43
Previous venous thrombosis	5 (13%)	24 (12%)	0.90
Oral contraceptives*	6 (22%)	29 (20%)	0.49
D-Dimer measurement	29 (74%)	69 (35%)	0.001
Increased§	22 (76%)	6 (9%)	0.001
Absolute values (μg/ml), median (range)	0.21 (0.09 - 2.51)	0.07 (0.01 - 3.1)	0.001
Thrombus location		Not applicable
Superior sagittal sinus	14 (36%)
Transverse sinus	24 (83%)
Sigmoid sinus	6 (21%)
Internal jugular vein	3 (10%)
Straight sinus	10 (34%)
Cortical veins	1 (3%)

* limited to females.

^§ limited to patients with D-dimer measurements, reference range below 0.19 μg/ml.