郑州两所小学学生核黄素营养状况与评价指标探讨

Study on Dietary Habits and Nutritional Knowledge Levels of Pupils and Evaluation Criterion of Riboflavin Nutriture

目的 了解小学生核黄素营养状况并探讨核黄素营养状况评价指标。方法 整群抽取城市郊区和农村小学生共 2 0 4人 ,年龄 7～ 9岁 ,分城郊 5 .0mg和城郊 2 .5mg、农村 5 .0mg剂量组 ,进行核黄素 4h尿负荷试验 ,以荧光法测定尿中核黄素含量。 结果 农村小学生核黄素不足率 31 .5 % ,显著高于城郊小学生的 1 6 .4% ,城郊 5 .0mg组与城郊 2 .5mg组试验结果差异亦有显著性。 结论 (1 )所调查儿童核黄素营养状况较差 ,农村儿童尤为明显 ;(2 )不同负荷剂量组试验结果差异存在显著性 ,对于儿童 2 .5mg的负荷剂量可能较适合 ,但需要进一步研究。

Objective To study riboflavin nutriture and its evaluation criterion in primary schoolchildren. Methods Two hundred and four suburban and rural pupils, aged 7～9 years, were drawn using cluster sampling method and were assigned to 3 groups, suburban pupils were given 5.0mg and 2.5mg of loading doses of riboflavin and rural pupils were given 5.0mg of riboflavin. After 4h, the amounts of riboflavin in their urinary were determined using a fluorescence method. Results The rate of riboflavin insufficiency was higher in rural pupils (31.5%) than in suburban pupils (16.4%), the difference was significant in the rate between suburban pupils given 5.0mg and 2.5 mg of riboflavin.Conclusions Riboflavin nutriture of pupils in this study was unsatisfactory, especially those of rural pupils. Different loading doses had different results, 2.5mg of loading dosage is recommended.