【摘要】 [目的]了解泰安市乙脑发生的时间分布规律,探讨开展乙脑疫苗预防接种前后和不同发病率时期发病的时间分布特征,以指导今后的防制工作。[方法]应用圆形分布方法对泰安市1959~2004年乙脑发病资料进行分析。[结果]泰安市1959~2004年乙脑平均发病高峰日为8月27日,高峰期为8月4日至9月19日。乙脑疫苗预防接种前、接种初期和程序接种期,乙脑发病的集中度r值由0.938逐渐减少至0.905,s值增大,不同阶段发病高峰日的的差异有统计学意义(P<0.01);乙脑发病率为<1/10万、1/10万~、10/10万~、30/10万以上4个时期乙脑发病的r值由0.861逐渐增大到0.958,s值由31.32减小到16.80,不同阶段发病高峰日的差异有统计学意义(P<0.01)。[结论]泰安市乙脑发病有严格的季节性。随着乙脑疫苗接种工作的开展,乙脑的发病率逐渐降低,发病的高峰日提前,高峰期延长。更多还原

【Abstract】 [Objective]To understand the regulation of time distribution of epidemic encephalitis B in Taian city,explore the characteristic of time distribution before and after immunization and different morbidity of the disease.provide scientific basis for prevention and control.[Methods]Data on encephalitis B from 1959 to 2004 in Taian city were analyzed with circular distribution method.[Results]The average peak day of the disease was on 27th,August from 1959 to 2004 in Taian city.The duration of the peak was from the 4th August to the 19th September.r value which indicated the morbidity of the disease gradually reduced from 0.938 to 0.905 before,initial and routine immunization.There was a difference of the different peak day at different stage(P<0.01).r value was increased from 0.861 to 0.958 when the morbidity of the disease was <1/100 000,1/100 000,10/100 000,and >30/100 000 but s value was reduced from 31.32 to 16.80.There was a different of the peak day in different stage(P<0.01).[Conclusion]There was a seasonal characteristic of the prevalence of the disease.The morbidity of the disease was gradually reduced,the peak day had been moved up and the peak stage was prolonged along with the implementation of encephalitis B immunization.更多还原