Table 3.

CT data (if answered ‘Yes’ to ‘Was a CT head performed before the operation?’ in Table 2).

Date/time of first available CT head for review	…
Midline shift in mm?	0–5 mm, 5–10 mm, >10 mm
Basal cisterns	Open, Compressed/obliterated, Unknown
Traumatic subarachnoid haemorrhage?	Yes, No
Is there a depressed skull fracture?	Yes, No If yes, are any of the fragments depressed > 1 cm relative to the rest of the skull on CT? Yes, No If yes, is there any evidence of pneumocephalus on CT? Yes, No If yes, is there evidence of a compound depressed skull fracture on examination of the patient? Yes, No
	Left	Right
Supratentorial extradural haematoma?	No, 0–10 mm, 10–20 mm, >20 mm, Unknown	No, 0–10 mm, 10–20 mm, >20 mm, Unknown
Supratentorial subdural haematoma?	No, 0–10 mm, 10–20 mm, >20 mm, Unknown	No, 0–10 mm, 10–20 mm, >20 mm, Unknown
Supratentorial traumatic parenchymal lesion	No, Small, Large - >50 cm3 volume, Unknown	No, Small, Large - >50 cm3 volume, Unknown
Is there a traumatic posterior fossa haemorrhage?	Yes, No