城市居民维生素A营养状况调查

A survey on the nutritional status of vitamin A among urban residents

目的评价城市居民维生素A营养状况。方法在浙江2城市按多阶段整群随机抽样方法,抽取400名居民,通过问卷调查和3天24小时膳食调查法、体格检查和血样采集检测血清维生素A水平,采用维生素A每日推荐摄入量(RNI)来评价维生素A膳食摄入状况,分析城市居民维生素A营养状况及其影响因素。结果城市居民维生素A水平中位数为0.463(0.213)μg/m L,维生素A高度缺乏的占0.25%、缺乏的占0.50%、不足的占6.75%、充足的占92.50%。299人参与了膳食调查,每日维生素A摄入量的中位数为350.5(351.5)μgRE;平均每日维生素A摄入量低于60%RNI的占61.87%,仅有25.42%的人摄入量在80%RNI以上。男性、大城市、年龄较大、血清甘油三酯水平较高及膳食胆固醇摄入较高的居民其血清维生素A水平较高。结论城市居民血清维生素A较为充足,但维生素A膳食摄入状况仍有待改善。年龄、性别、地区等因素影响血清维生素A水平。

Objective To evaluate the nutritional status of vitamin A among urban residents. Methods Using stratified random sampling method,a total of 400 residents from two cities in Zhejiang were selected. They were interviewed by questionnaire,also, the dietary survey, physical measurement and blood sample testing were used. According to Recommended Nutrient Intake（ RNI）of vitamin A,to evaluate the intake of Vitamin A and analysis the nutritional status and influenc factors. Results The median of vitamin A concentration was 0. 463（ inter-quartile range is 0. 213）μg/mL, and the percentage of severe vitamin A deficiency（ VAD ）,VAD,insufficiency and adequate serum vitamin A were 0. 25%,0. 50%,6. 75% and 92. 50% respectively. Among 299 individuals who participated in the dietary survey,the median of daily vitamin A intake was 350. 5（ inter-quartile range was 351. 5）μgRE. Only 25. 42% of participants＇ dietary intake of vitamin A met the level of 80% RNI,while 61. 87% of peoples＇ daily intake of vitamin A under 60%RNI. Male, from the bigger city,older age,high level of triglyceride and more intake of cholesterol may contribute to a higher level of serum vitamin A. Conclusion The majority of urban residents had adequate vitamin A . But the intake of dietary vitamin A still should be paid more attention. Serum vitamin A was associated with age,gender and district.