中文摘要：

目的 了解大连市中山区3类初中（本地学生为主、外来学生为主、均衡生源）学生营养状况,为开展学生营养卫生工作提供依据。方法 对大连市中山区6 333名初中生进行普查,将5所本地学生为主初中、4所外来学生为主初中、4所均衡生源初中分别归为甲类、乙类、丙类初中,采用身高标准体重法评价营养状况并对3类初中进行比较分析。结果肥胖率：甲类、乙类、丙类初中,男生分别为25.07%、23.93%、22.77%;女生分别为22.75%、21.95%、18.73%。男生,甲类与乙类、乙类与丙类、甲类与丙类初中,差异均无统计学意义（P〉0.05）;女生,甲类与乙类、乙类与丙类、甲类与丙类初中、差异也均无统计学意义（P〉0.05）。性别比较,甲类初中的男生与女生、乙类初中的男生与女生、丙类初中的男生与女生,差异均无统计学意义（P〉0.05）。营养不良率：甲类、乙类、丙类初中,男生分别为12.57%、14.10%、15.45%,女生分别为3.94%、4.60%、5.02%。男生,甲类与乙类、乙类与丙类、甲类与丙类初中,差异均无统计学意义（P〉0.05）;女生,甲类与乙类、乙类与丙类、甲类与丙类初中,差异也均无统计学意义（P〉0.05）。性别比较,甲类初中的男生与女生、乙类初中的男生与女生、丙类初中的男生与女生,差异均有统计学意义（P〈0.05）。结论 大连市城市初中生肥胖率较高,男、女生接近,3类初中没有明显差别;营养不良率较低,男生明显高于女生（P〈0.01）,3类初中虽然表现为丙类〉乙类〉甲类,却没有统计学意义。

英文摘要：

Objective To understand the nutritional status of 3 kinds of junior high school students in Zhongshan district of Dalian city,so as to provide the basis for developing students＇ nutrition and health. Methods In the census of 6 333 junior high school students in Zhongshan district, Dalian city, 5 local students dominant junior high schools, 4 migrant students dominant junior high schools,and 4 balanced source junior high schools were divide into category A, B, C junior high schools, the height and weight standard method was used to assess the nutritional status and compare the 3 categories of junior high schools. Results The rate of obesity： the boys in A, B and C categories were 25.07%, 23.93% and 22.77 % respectively,while the girls were 22.75%, 21.95% and 18.73% respectively. For the boys, the difIerence between A and B categories,between B and C categories and between A and C categories was not significant（ P 〉0.05）. For the girls,the difference between A and B categories,between B and C categories,and between A and C categories was also not significant（ P 〉0.05）. In comparison between the males and the females, the difference between them in A, B and C categories was also not significant （P 〉 0.05）. In the rate of malnutrition： the boys in A, B and C categories were 12.57% ,14.10% ,and 15.45%0 respectively,while the girls were 3.94% ,4.60% ,and 5.02% respectively. For the boys, the difference between A and B categories, between B and C categories, and between A and C categories was not significant （ P 〉0.05）. For the girls,between A and B categories,between B and C categories,and between A and C categories was also not significant（ P 〉0.05）. In comparison between the males and the females, the difference between them in A, B and C categories weas significant（ P 〈0.05）. Conclusion The rate of obesity is high among urban junior high school students in Dalian city, and there is no significant difference among A, B and C categories, and there is no significant difference