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于1983年5月～1985年4月,对吉林省延吉市小营乡小营村朝鲜族7岁以下儿童进行了前瞻性流行病学调查。总发病率2,765.6‰。儿童发病率、相对危险度、特异危险度随着年龄增长而增高,到幼儿期达最高峰3,899.5‰,到学龄前下降。占前五位的疾病是呼吸系、消化系、血液系、营养缺乏及寄生虫病,这些疾病的发病率占总发病率的95.2％。一年发病有两个高峰,第一个高峰6～8月,第二个高峰12—2月。这两个高峰月的相对危险度、特异性危险度高于其他月份。患佝偻病儿童的发病率明显高于未患佝偻病儿童的发病率。
From May 1983 to April 1985, a prospective epidemiological survey of Korean children under 7 years of age was conducted in Xiaoying Village, Xiaoying Township, Yanji City, Jilin Province. The total incidence of 2,765.6 ‰. Children’s morbidity, relative risk and specific risk increased with age, reached the peak of 3,899.5 ‰ in infancy and declined to pre-school age. The top five diseases are respiratory, digestive, hematological, nutritional deficiencies and parasitic diseases, the incidence of these diseases accounted for 95.2% of the total incidence. One year incidence of two peaks, the first peak of 6 to August, the second peak from 12 to February. The relative risk of these two peak months, the specific risk higher than the other months. The incidence of children with rickets is significantly higher than that of children without rickets.