National Study of Health and Growth, Phase II : 1977-1981 (Years 6-10)

Following changes in the provision of welfare, school milk and school meals in 1971, studies were set up to assess the possible effects of these changes upon the nutritional state of the population. The aim of the National Study of Health and Growth (NSHG) was to set up an anthropometric system of surveillance on selected growth, nutritional and health characteristics that could identify the effects of the changes in food policy. Height was chosen as the main indicator of nutritional status together with weight and triceps skinfold thickness. The primary aim of the study was to estimate trends in anthropometric measurements for children of the same age. Although changes in rate of growth at a given age may occur over time, the main question to be answered was whether there had been any overall shift in the position of the growth curve.<br>
The aim of the second phase of the study was to continue the collection of basic information for monitoring the nutritional status of primary school children in all previous areas, with the additional collection of selected information for associated studies from a suitable subset of other areas. Further details are given in Appendix 3 of the User Guide for this study (3986).

1971年，随着福利供给、学校牛奶供应及学校供餐政策发生调整，相关研究相继启动，以评估此类政策变化对人群营养状况的潜在影响。全国健康与生长研究（National Study of Health and Growth, NSHG）的目标是建立一套人体测量监测体系，针对选定的生长、营养与健康特征开展监测，从而识别食品政策变化所带来的效应。研究选取身高作为营养状况的核心观测指标，辅以体重与三头肌皮褶厚度。本研究的首要目标是估算同年龄段儿童人体测量指标的变化趋势。尽管特定年龄段的生长速率可能随时间推移发生改变，但本研究需解答的核心问题为：生长曲线的整体位置是否出现了偏移。
本研究第二阶段的目标是延续对既往所有覆盖区域内小学生营养状况的监测基础信息采集工作，并从其他适宜子集区域额外收集用于关联研究的选定信息。本研究的更多细节可参见该研究用户指南的附录3（编号3986）。