Cole T J
MRC Dunn Nutrition Centre, Cambridge.
Arch Dis Child. 1997 Jan;76(1):47-9. doi: 10.1136/adc.76.1.47.
To provide a simple method for assessing centile change based on the British 1990 growth reference.
The change in SD score over a period of time has SD square root of 2(1-r), where r is the correlation between the first and second SD score. This leads to an SD score for centile change.
Annual height measurements from 2 to 9 years for 318 children from the French longitudinal growth study.
The correlations between heights at different ages are higher for shorter measurement intervals and at older ages. The chance of a child's height centile falling one centile band width is correspondingly smaller for shorter measurement intervals and at older ages. An increase in height measurement error reduces the correlations and dramatically increases the chances of centile crossing.
Quantitative height monitoring based on centile change is provided for whole year periods between 2 and 9 years of age. Effective monitoring requires the measurement error to be as small as possible.
提供一种基于英国1990年生长参考标准评估百分位数变化的简单方法。
一段时间内标准差分数的变化具有标准差的平方根2(1 - r)，其中r是第一个和第二个标准差分数之间的相关性。这得出了一个用于百分位数变化的标准差分数。
来自法国纵向生长研究的318名儿童2至9岁的年度身高测量数据。
测量间隔较短和年龄较大时，不同年龄身高之间的相关性较高。测量间隔较短和年龄较大时，儿童身高百分位数下降一个百分位数带宽的可能性相应较小。身高测量误差的增加会降低相关性，并显著增加百分位数跨越的可能性。
提供了2至9岁全年基于百分位数变化的定量身高监测。有效的监测要求测量误差尽可能小。
