The Change of Case Fatality Rate and Proportional Mortality Rate in Hospital Between 1976 to 1994 Analysis of Diagnosis and Therapy of Mental Disease in Hospital 1976~1994年住院病人病死率及死因构成比分析我院住院精神病人的诊断治疗现状
2. 3 Proportional mortality rate and change tendency of maternal mortality ratio 2.3孕产妇的死因构成和变化趋势
Methods The methods of retrospective survey and Probability Proportional sampling ( PPS) were used in the investigation of NT Mortality rate, the inoculation rate of tetanus toxoid ( TT) in the women of child-bearing age, antibody lavel; 方法用回顾性和PPS调查方法调查NT死亡率、育龄妇女TT接种率、抗体水平;