7、50%NPE蛛网膜下腔出血:约45%NPE,后循环动脉瘤破裂可达70%457例蛛网膜下腔出血的病人有6%发生了严重的NPE。SolenskiNJ,etal. Medicalcomplicationsofaneurysmalsubarachnoidhemorrhage:areportofthemulticenter,cooperativeaneurysmstudy.CritCareMed. Jun 1995;23(6):1007-17.NPE死亡率:国外约7%国内60%~90%种族:无倾向性别:无差异年龄:不是NPE特有的危险因素;