Table 1

Patient characteristics of ultra-early and delayed surgery groups

CharacteristicsUltra-early (<24 h)Delayed (>24 h)p Value
N (male/female)47 (21/26)71 (29/42)0.680
Age (mean years±SD)53.9 (±12.5)55.5 (±10.8)0.241
Current smoking, n (%)9 (19)22 (31)0.153
Medical history
 Hypertension, n (%)24 (51)44 (62)0.240
 Diabetes mellitus, n (%)6 (13)9 (13)0.989
Postresuscitation WFNS grade, n (%)<0.001
 IV19 (40)52 (73)
 V28 (60)19 (27)
Fisher grade, n (%)0.479
 I–II4 (9)9 (13)
 III–IV43 (91)62 (89)
Brain herniation, n (%)23 (49)11 (16)<0.001
ICH, n (%)30 (64)28 (40)0.010
IVH, n (%)16 (34)38 (54)0.038
Multianeurysms, n (%)5 (11)15 (21)0.137
Aneurysm location, n (%)0.344
 MCA24 (51)27 (38)
 ACoA, ACA11 (23)24 (34)
 ICA, PCoA12 (26)16 (23)
 Posterior circulation03 (4)
 Anterior circulation*01 (1)
Aneurysm size(mean mm±SD)6.0 (±3.9)6.3 (±3.6)0.706
Rebleeding before surgery, n (%)1 (2)2 (3)0.966
Improvement before surgery2 (4)6 (9)0.474
In-hospital mortality7 (15)12 (14)0.771
Overall mortality15 (32)22 (31)0.915
  • *Data on location of anterior circulation aneurysm was missing in one patient.

  • ACA, anterior cerebral artery; ACoA, anterior communicating artery; ICA, internal carotid artery; ICH, intracerebral haematoma; IVH, intraventricular haemorrhage; MCA, middle cerebral artery; PCoA, posterior communicating artery; WFNS, World Federation of Neurosurgical Societies.