用圆形分布法分析包头地区麻疹季节分布特征

Analysiing the Seasonally Distributive Characteristic of Measles by Circle-shapped Method in Baotou

应用圆形分布法，对包头市１９５４年至１９９１年麻疹的平均发病高峰期进行了分析。３８年来虽然麻疹发病率呈下降趋势，但都存在着发病高峰期（Ｐ＜０．０１）。且未使用麻疹疫苗的１９５４－１９６４年平均发病高峰期为３月１２日，使用麻疹疫苗实施预防接种的１９６５－１９７９年平均发病高峰期为４月６日，实施计划免疫的１９８０－１９９１年平均发病高峰期为４月２４日，发病高峰明显后移（Ｐ＜０．０１）。

n average height period of incidence of measles from 1954 to 1991 has been analysedwith circle-shapped method,There are height periods of the iincidence(p<0.1),though theincidence of measles has shown a tendency to drop during the past thirty-eight years.An average height pe-riod of the incidence from 1954to 1964is 12th,May without inoculating measles vaccine. An average height pe-riod of incidence from 1965to 1979is 6th, Apirl with inoculating measles vaccine. An average height periodof he incidence from 1980 to1991 with imtnunity of plan is 24th,Apirl.Therefore the period has put keen offobviously. (P<0.01)