Black A E, Cole T J, Wiles S J, White F
Hum Nutr Appl Nutr. 1983 Dec;37(6):448-58.
This paper examines the day to day variation in energy intake of 48 breast-fed infants studied by 4-day diet records at monthly intervals from 6 weeks to 7 1/2 months and of 37 fully weaned infants studied at 10, 12, 15 and 18 months. Variation was low in the fully breast-fed infants, increased as solids were introduced, and at 18 months, approached values found for adults. Pooled within-subject coefficient of variation (CVw) at 1-3, 3-5, 5-7, 10 + 12, and 15 + 18 months was 10.6, 10.6, 12.0, 13.6, 18.1 per cent. Between-subject coefficient of variation (CVb) was 20.1, 19.3, 16.9, 19.4 and 23.3 per cent at these ages. Some individuals were more variable than others; the range of CVw at each age was wide; at 2-4 and 15-18 months it was 1-21 and 6-30 per cent respectively. The number of daily records needed to assess energy intake of groups of individuals with a specified degree of confidence is discussed together with implications for the planning of dietary surveys.
本文研究了48名母乳喂养婴儿的每日能量摄入量变化情况，这些婴儿从6周龄至7个半月，每隔一个月通过4天饮食记录进行研究；还研究了37名完全断奶婴儿在10、12、15和18个月时的情况。纯母乳喂养婴儿的摄入量变化较小，随着固体食物的引入而增加，到18个月时，接近成人的摄入量值。在1 - 3、3 - 5、5 - 7、10 + 12和15 + 18个月时，受试者内合并变异系数（CVw）分别为10.6%、10.6%、12.0%、13.6%、18.1%。在这些年龄段，受试者间变异系数（CVb）分别为20.1%、19.3%、16.9%、19.4%和23.3%。一些个体的变异性比其他个体大；每个年龄段的CVw范围都很广；在2 - 4个月和15 - 18个月时，分别为1% - 21%和6% - 30%。讨论了评估具有特定置信度的个体群体能量摄入量所需的每日记录数量，以及对饮食调查规划的影响。
