Estimating Dietary Vitamin A Requirement in Chinese Children by Stable-isotope Dilution Technique
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 403
- 试验地点
- 1
研究概览
简要总结
Vitamin A deficiency remains a major public health problem in developing country worldwide. Young Children are considered to be at greatest risk of deficiency. However, there is little information on the vitamin A requirement of Chinese children. In the present study, about 400 children aged between 4 and 9 years old in a kindergarten and an elementary school of Shiyan City were screened before admission by questionnaire and anthropometric measurement. The vitamin A status of children was assessed by serum vitamin A level, relative dosage reaction and stable-isotope dilution technique. At the same time, their dietary vitamin A intakes were estimated by weighted-food dietary survey. The dietary vitamin A requirement in young children was determined on the basis of dietary vitamin A intakes in Children with adequate vitamin A level.
研究设计
- 研究类型
- Observational
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 4 Years 至 9 Years（Child）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •well-nourished children with normal serum retinol(>=1.40umol/L)
排除标准
- •ongoing or previous illnesses,
- •having taken nutritional supplements within 3 months,
- •positive results in the fat absorption test or parasite test,
- •increased level of CRP (> 8 mg/L), or
- •lower serum level of retinol (< 1.40 umol/L)
研究者
Xiufa Sun
Professor
Huazhong University of Science and Technology