The incidence of obesity, venous sinus stenosis and cerebral hyperaemia in children referred for MRI to rule out idiopathic intracranial hypertension at a tertiary referral hospital: a 10 year review

Table 2 Mean cerebral blood flow and optic nerve sheath diameter

Case	Age years	Arterial inflow ml/min	Sagittal sinus flow ml/min	Straight sinus flow ml/min	SSS % flow	ST % Flow	Brain volume cm³	CBF ml/100cm³/min	Average ONSD mm
Control
Mean	9.2	990	560	170	57	17	1224	82	5.3
SD	4.1	210	130	70	8	5	219	15	0.6
n = 22
At risk for IIH Hyperemic
Mean	8.3	1620	670	190	42	12	1358	120	6.2
SD	3.5	190	150	60	10	3	1136	16	0.9
n = 19
t-test	0.48	< 0.0001*	0.01*	0.26	< 0.0001*	0.001*	0.03*	< 0.0001*	0.0002*
At risk for IIH non Hyperemic
Mean	10.5	1010	530	140	48	13	1321	84	5.1
SD	3.4	190	110	60	7	5	152	16	0.7
n = 23
t-test	0.25	0.09	0.41	0.23	0.001*	0.02*	0.12	0.58	0.26
All cohort
Mean	9.5	1330	600	170	46	13	1334	100	5.6
SD	3.5	310	150	60	10	4	145	24	1.0
n = 42
t-test	0.73	< 0.0001*	0.34	0.88	< 0.0001*	0.0009*	0.02*	0.005*	0.19

cm³ centimeter cubed, SSS superior sagittal sinus, ST straight sinus, ml/100cm³/min milliliters per 100 cm cubed per minute, mm millimeters, mm² millimeters squared, SD standard deviation, ONSD optic nerve sheath diameter; ^*, t-test p value < 0.05. All t-tests compare patient groups with the control group

ISSN: 2045-8118