【摘要】 目的:分析2009年我国九省区中老年居民膳食维生素A摄入状况及1991—2009年间变化趋势。方法:选取1991—2009年"中国健康与营养调查"(CHNS)7轮调查中50—79岁中老年居民作为研究对象。以膳食视黄醇、胡萝卜素和总维生素A每日平均摄入量作为维生素A摄入状况的评价指标。分别描述2009年分性别、年龄、地区的维生素A摄入水平;1991—2009年间分地区的膳食维生素A摄入状况、视黄醇占总维生素A摄入的比例以及总维生素A达到推荐摄入量(RNI)比例的人群分布变化趋势。结果:2009年我国中老年居民膳食总维生素A、胡萝卜素和视黄醇平均每日摄入量分别为602.4μg RE/d、1 570.6μg/d、373.8μg/d,男性高于女性,城市、郊区高于县城、农村。1991—2009年间,膳食总维生素A和胡萝卜素摄入量在波动中小幅下降,视黄醇摄入量自1993年起持续升高;视黄醇在总维生素A摄入中的比例随时间变化呈上升趋势,城市、郊区、县城、农村分别从1991年的62.8%、59.4%、60.9%、56.9%上升到2009年的70.9%、73.1%、67.0%、68.1%。需要注意的是,2004年以后,郊区和农村居民中视黄醇占总维生素A摄入的比例上升迅速分别超过了城市和县城居民。膳食维生素A摄入达到RNI以上的人群比例从1991年的33.0%小幅降至2009年的28.6%,未达到40%RNI的人群比例从1991年的30.3%下降至2009年的28.4%;膳食维生素A摄入达到40%RNI、60%RNI、80%RNI的人群比例则分别从1991年的14.6%、12.0%、10.0%上升到2009年的17.7%、13.9%、11.4%。结论:18年间,我国中老年居民膳食维生素A和胡萝卜素摄入在波动中有小幅下降,视黄醇摄入升高,地区差异明显,需要注意县城和农村中老年居民维生素A摄入水平较低。更多还原

【Abstract】 Objective To investigate dietary vitamin A intake status among Chinese middle age and elderly adults in 9 provinces in 2009 and the trends from 1991 to 2009.Method Adults aged 50-79 years old from China Health and Nutrition Survey(CHNS),from 1991 to 2009 were selected.Average intake of dietary retinol,carotene and total vitamin A were defined as key variables of vitamin A status.Vitamin A intake at different gender,age and area levels in 2009,and change trends from 1989 to 2009 by areas were analyzed.Trends of the ratio of retinol to total vitamin A and percents of vitamin A to RNI were also demonstrated.In 2009,average intake of dietary vitamin A,carotene and retinol were 602.4 μg RE/d,1 570.6 μg/d and 373.8 μg/d,respectively.Male had higher intake than females,while intake in city and suburban were higher than those in town and village.Intake of vitamin A and carotene decreased slightly with floatation frem 1991 to 2009,while that of retinol increased since 1993.The ratio of retinol to vitamin A increased yearly,which in city,suburban,town and village increased from 62.8%,59.4%,60.9% and 56.9% in 1991 to 70.9%,73.1%,67.0% and 68.1% in 2009,respectively.However,adults in suburban and village had higher ratio of retinol to vitamin A than those in city and town.The percentage of population with dietary vitamin A intake above RNI briefly decreased from 30.3% in 1991 to 28.4% in 2009,while the percentage of population with dietary vitamin A intake more than 40%RNI,60%RNI,80% RNI increased from 14.6%,12.0% and 10.0% in 1991 to 17.7%,13.9% and 11.4% in 2009.Conclusion Dietary vitamin A intake among Chinese middle age and elderly adults decreased slightly with floatation from 1991 to 2009,while that of retinol increased.However,it needs more attention to the lower vitamin A intake in town and village areas.更多还原