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1988年～1992年连续5年对昌黎地区城乡49874名7岁以下儿童进行营养性缺铁性贫血(IDA)的调查及防治;并在1992年度抽样调查了城乡2286名8～12岁儿童。发现城区各年龄段儿童IDA发病率明显高于农村儿童,统计学处理具有显著性差异。实施防治措施后,城乡7岁以下儿童IDA发病率由1988年的34.2％、19.1％分别下降至1992年的15.7％和4.9％。但1992年度8～12岁儿童IDA患病率高达29.7％,与同期7岁以下儿童相比,其患病年龄高峰由3月～3岁转移至8～12岁。提出应高度重视城区儿童,尤其是年长儿童缺铁性贫血的防治。
1988 to 1992 for 5 consecutive years in Changli 49,774 urban and rural children under the age of 7 years of nutritional iron deficiency anemia (IDA) investigation and prevention; and in 1992 a sample survey of 2286 urban and rural children 8 to 12 years old. Found that urban children of all ages IDA incidence was significantly higher than that of rural children, the statistical analysis of significant differences. After the implementation of prevention and treatment measures, the incidence of IDA in children under 7 years old in urban and rural areas dropped from 34.2% and 19.1% in 1988 to 15.7% and 4.9% in 1992 respectively. However, the prevalence rate of IDA among children aged 8 to 12 in 1992 was as high as 29.7%. Compared with children under 7 years old in the same period, the peak age of IDA was transferred from March to 3 years old to 8 to 12 years old. It is suggested that prevention and treatment of iron deficiency anemia in urban areas, especially older children, should be highly valued.