Wright Davene R, Glanz Karen, Colburn Trina, Robson Shannon M, Saelens Brian E
Department of Pediatrics, University of Washington School of Medicine, M/S CW8-6, PO Box 5371, Seattle, WA, 98145-5005, USA.
Center for Child Health, Behavior, and Development, Seattle, WA, USA.
BMC Pediatr. 2018 Feb 12;18(1):52. doi: 10.1186/s12887-018-1042-x.
Previous studies have examined correlations between BMI calculated using parent-reported and directly-measured child height and weight. The objective of this study was to validate correction factors for parent-reported child measurements.
Concordance between parent-reported and investigator measured child height, weight, and BMI (kg/m) among participants in the Neighborhood Impact on Kids Study (n = 616) was examined using the Lin coefficient, where a value of ±1.0 indicates perfect concordance and a value of zero denotes non-concordance. A correction model for parent-reported height, weight, and BMI based on commonly collected demographic information was developed using 75% of the sample. This model was used to estimate corrected measures for the remaining 25% of the sample and measured concordance between correct parent-reported and investigator-measured values. Accuracy of corrected values in classifying children as overweight/obese was assessed by sensitivity and specificity.
Concordance between parent-reported and measured height, weight and BMI was low (0.007, - 0.039, and - 0.005 respectively). Concordance in the corrected test samples improved to 0.752 for height, 0.616 for weight, and 0.227 for BMI. Sensitivity of corrected parent-reported measures for predicting overweight and obesity among children in the test sample decreased from 42.8 to 25.6% while specificity improved from 79.5 to 88.6%.
Correction factors improved concordance for height and weight but did not improve the sensitivity of parent-reported measures for measuring child overweight and obesity. Future research should be conducted using larger and more nationally-representative samples that allow researchers to fully explore demographic variance in correction coefficients.
以往研究已探讨了使用父母报告的孩子身高和体重计算得出的BMI与直接测量的身高和体重之间的相关性。本研究的目的是验证针对父母报告的孩子测量数据的校正因子。
使用林氏系数检验了“邻里对儿童的影响研究”（n = 616）参与者中父母报告的孩子身高、体重和BMI（kg/m）与研究者测量值之间的一致性，其中±1.0表示完全一致，零值表示不一致。基于常用收集的人口统计学信息，使用75%的样本建立了父母报告的身高、体重和BMI的校正模型。该模型用于估计其余25%样本的校正测量值，并测量校正后的父母报告值与研究者测量值之间的一致性。通过敏感性和特异性评估校正值在将儿童分类为超重/肥胖方面的准确性。
父母报告的身高、体重和BMI与测量值之间的一致性较低（分别为0.007、 - 0.039和 - 0.005）。校正测试样本中身高的一致性提高到0.752，体重为0.616，BMI为0.227。校正后的父母报告测量值在测试样本中预测儿童超重和肥胖的敏感性从42.8%降至25.6%，而特异性从79.5%提高到88.6%。
校正因子提高了身高和体重的一致性，但未提高父母报告测量儿童超重和肥胖的敏感性。未来研究应使用更大且更具全国代表性的样本进行，以便研究人员充分探索校正系数中的人口统计学差异。
