Department of Social Medicine, University of Bristol, Bristol, UK.
Arch Dis Child. 2009 Dec;94(12):950-4. doi: 10.1136/adc.2009.162552. Epub 2009 Aug 17.
There is limited knowledge of the accuracy of height and weight measurements from child health records, despite widespread use for research and clinical care. We assess the accuracy of such measurements, using research measurements as the gold standard.
We compare height/length and weight measurements from clinics of the Avon Longitudinal Study of Parents and Children with routinely collected child health records within 2 months of the clinic date at age 4 (n = 345), 8 (n = 1051), 12 (n = 139), 18 (n = 649), 25 (n = 183), and 43 months (n = 123). To adjust for age differences at measurement, growth data were converted into standard deviation scores using the UK 1990 growth reference.
Mean weight standard deviation score (SDS) differences were < or =0.08, with mean predicted differences < or =0.1 kg (eg, mean predicted difference at 8 months -0.011 kg, 95% level of agreement -0.64 to 0.62 kg). Mean height SDS differences were < or =0.45, with mean predicted differences < or =0.9 cm (eg, mean predicted difference at 8 months -0.59 cm, 95% level of agreement -3.84 to 2.66 cm). There was indication of lower accuracy at 4 months old (mean predicted height difference at 4 months -0.91 cm, 95% level of agreement -4.61 to 2.79 cm), but this decreased when the age difference between measurements was reduced. Routine measurements slightly overestimated heights of tall children and underestimated those of short children, but otherwise differences were not associated with sex, social class, birth weight, birth length, or maternal anthropometry.
Routinely collected child health record height/length and weight data are compatible with no systematic bias, at least in children over 8 months old, supporting their use in clinical practice and research.
尽管身高和体重的测量数据在研究和临床护理中被广泛应用，但人们对儿童健康记录中这些数据的准确性知之甚少。我们使用研究测量值作为金标准来评估这些测量值的准确性。
我们比较了在诊所日期后 2 个月内从阿冯纵向研究父母和儿童的诊所收集的身高/长度和体重测量值与常规收集的儿童健康记录中的数据，这些数据来自于 4 个月（n = 345）、8 个月（n = 1051）、12 个月（n = 139）、18 个月（n = 649）、25 个月（n = 183）和 43 个月（n = 123）的儿童。为了调整测量时的年龄差异，使用英国 1990 年生长参考值将生长数据转换为标准差分数。
体重标准差评分（SDS）的平均差异<或=0.08，平均预测差异<或=0.1 公斤（例如，8 个月时的平均预测差异为-0.011 公斤，95%的一致性范围为-0.64 至 0.62 公斤）。身高 SDS 的平均差异<或=0.45，平均预测差异<或=0.9 厘米（例如，8 个月时的平均预测差异为-0.59 厘米，95%的一致性范围为-3.84 至 2.66 厘米）。在 4 个月大时，准确性较低（4 个月时的平均预测身高差异为-0.91 厘米，95%的一致性范围为-4.61 至 2.79 厘米），但当测量值之间的年龄差异减小时，这种情况会减少。常规测量值略微高估了高个子儿童的身高，低估了矮个子儿童的身高，但除此之外，这些差异与性别、社会阶层、出生体重、出生长度或母体人体测量值无关。
至少在 8 个月以上的儿童中，常规收集的儿童健康记录中的身高/长度和体重数据与无系统偏差兼容，支持在临床实践和研究中使用这些数据。
