Table 1.

Demographics. IVH intra-ventricular haemorrhage, IIH idiopathic intracranial hypertension, SD standard deviation

	Overall	Pre-protocol	Post-protocol
Number of procedures	809	442	367
Mean age in months ± SD	55.8 ± 62.8	59.4 ± 63.7	49.8 ± 60.4
Gender
Male	435 (53.8%)	225 (50.9%)	210 (57.2%)
Female	374 (46.2%)	217 (49.1%)	157 (42.8%)
Procedure type
Primary shunt insertion	350 (43.3%)	193 (43.7%)	157 (42.8%)
Shunt revision	459 (56.7%)	249 (56.3%)	210 (57.2%)
Diagnosis
Tumour	123 (15.2%)	72 (16.3%)	65 (13.9%)
Post-IVH	190 (23.5%)	84 (19.0%)	106 (28.9%)
Spina bifida	78 (9.6%)	38 (8.6%)	40 (10.9%)
Craniofacial or craniocervical	57 (7%)	35 (7.9%)	22 (6.0%)
IIH	38 (4.7%)	26 (5.9%)	12 (3.3%)
Post-infection	38 (4.7%)	20 (4.5%)	18 (4.9%)
Aqueduct stenosis	27 (3.3%)	16 (3.6%)	11 (3.0%)
Vascular disorder	13 (1.6%)	8 (1.8%)	5 (1.4%)
Trauma	8 (1.0%)	6 (1.4%)	2 (0.5%)
Epilepsy	1 (0.1%)	1 (0.2%)	0 (0.0%)
Other	236 (29.2%)	136 (30.8%)	100 (27.2%)
Grade of operating surgeon
Consultant	496 (61.3%)	271 (61.3%)	225 (61.3%)
Resident/fellow	313 (38.7%)	171 (38.7%)	142 (38.7%)