Table 1

Clinical features of patients with subarachnoid haemorrhage (group 2)

MedianRange
Clinical grade on admission
 Hunt and Hess 21–3
 Amount of blood in CT182–22
Clinical events after the bleeding
 First CT (h)4.81.9–132
 Aneurysm operation1-150(days)3.50.5–8
 CSF sample for analysis (days)148–25
  • An aneurysm was found and operated on in each patient (anterior communicating artery, four; medial cerebral artery, four; posterior cerebral artery, one).

  • 1-150 CSF sample from one patient was obtained before aneurysm operation at day 18 after the bleeding. This patient is not included in the data on the timing of the aneurysm operation.