Table 1. Baseline characteristics of patients and aneurysms.

^*p values are for the comparison between aneurysms that were not treated before rupture and those that were repaired with open surgical or endovascular treatment before rupture during follow-up. SAH : subarachnoid hemorrhage, MCA : middle cerebral artery, ACoA : anterior communicating artery, ICA : internal carotid artery, PCoA : posterior communicating artery