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目的了解东乡族和保安族7～14岁农村儿童维生素A(vitaminA,VA)水平差异。方法按照整群分层抽样方法抽取东乡族民族聚居区(甘肃省东乡县)和保安族民族聚居区(甘肃省积石山县)7～14岁农村小学生各57例作为研究对象,采用微量荧光测定法检测血清中VA含量。结果东乡族农村儿童血清VA平均水平为(1.41±0.42)μmol/L,无维生素A缺乏(VAD)者,其中亚临床维生素A缺乏(SVAD)者4人(占7.0%),可疑SVAD者10人(占17.6%);保安族农村儿童血清VA平均水平为(1.67±0.53)μmol/L,无VAD者,其中SVAD者1人(占1.7%),可疑SVAD者7人(占12.3%);两民族间儿童血清VA水平差异有统计学意义。不同年龄组儿童血清VA健康状况构成比差异有统计学意义,不同民族的男性儿童VA水平间差异有统计学意义,男女儿童SVAD和可疑SVAD上差异无统计学意义。结论两民族学龄儿童较多的还是存在SVAD及可疑SVAD现象,患SVAD及可疑SVAD的儿童应该是今后VA缺乏防治的对象。
Objective To understand the differences of Vitamin A (VA) level among children from 7 to 14 in Dongxiang and Bao’an ethnic groups. Methods A total of 57 rural primary school students from 7 to 14 years old in the Dongxiang ethnic group (Dongxiang County, Gansu Province) and Bao’an County (Gansu Province) were enrolled in this study according to cluster stratified sampling method. The micro fluorescence Method for detecting serum VA content. Results The average level of serum VA in rural children of Dongxiang nationality was (1.41 ± 0.42) μmol / L, with no vitamin A deficiency (VAD), of whom 4 were children with subclinical vitamin A deficiency (7.0%), 10 (17.6%). The average level of serum VA in Baonan rural children was (1.67 ± 0.53) μmol / L with no VAD, including 1 SVAD (1.7%) and 7 suspicious SVAD (12.3% There was significant difference in serum VA level between two ethnic groups. There were significant differences in the VA health status among children of different age groups. There was significant difference in the VA level between male and female children in different age groups. There was no significant difference between male and female children in SVAD and suspicious SVAD. Conclusions There are still more cases of SVAD and suspicious SVAD in two ethnic school-age children. Children with SVAD and suspicious SVAD should be the object of future VA deficiency.