Methods:We conducted a random sampling investigation into the clinical data of 102 cases of PVS and analysed the correlative factors of prognosis in the patients with PVS.

• 方法:采用临床流行病学方法,按照统一标准,随机抽样调查102例PVS患者临床资料。并进一步描述和分析了PVS患者与预后相关的临床流行病学特点。结果:病因、病程、性别和年龄均不是PVS预后的决定因素;