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为确定血压是否与85岁以上老年人所有病因的死亡成负相关(可解释为健康状态的调节,并确定当解释不佳健康状况的影响时,偏高的血压是否是导致死亡的危险因素),对Leiden,the Netherlands社区85岁以上居民进行5～7年的跟踪调查。835例的血压在
To determine whether blood pressure is negatively correlated with death from all causes of older persons over 85 years of age (can be explained by the regulation of health status and determining whether high blood pressure is a risk factor for death when explaining the effects of poor health conditions) , Conducting follow-up surveys of residents over 85 years old in Leiden, the Netherlands community. Blood pressure in 835 cases