Comparison of self-reported and measured BMI as correlates of disease markers in US adults
Comparison of self-reported and measured BMI as correlates of disease markers in US adults
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DOI：
10.1038/oby.2007.504
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发表时间：
2007-01-01
期刊：
影响因子：
6.9
通讯作者：
Hu, Frank B.
中科院分区：
文献类型：
--
作者：
McAdams, Mara A.;Van Dam, Rob M.;Hu, Frank B.
目的：本研究的目的是通过与技术人员测量的BMI和肥胖生物标志物进行比较，评估基于自我报告数据的BMI的有效性。研究方法和程序：我们分析了10个，639名≥ 20岁的国家健康与营养教育研究III参与者，比较根据自我报告的体重和身高计算的BMI与技术人员提供的BMI-测量值和身体肥胖估计从生物电阻抗分析与收缩压，空腹血糖水平，高密度脂蛋白胆固醇，甘油三酯，C-反应蛋白，和瘦素。基于自我报告数据的BMI（25.07 kg/m2）低于基于技术人员测量的BMI（25.52 kg/m2），因为少报体重（-0.56 kg; 95%置信区间，-0.71，-0.41）和多报身高（0.76 cm; 95%置信区间，0.64，0.88）。然而，自我报告和测量的BMI值之间的相关性非常高（白人为0.95，黑人为0.93，墨西哥裔美国人为0.90）。在生物标志物方面，自我报告和测量的BMI值与空腹血糖（r = 0.43）、高密度脂蛋白胆固醇（r = -0.53）和收缩压（r = 0.54）同样相关。两种BMI指标与甘油三酯和瘦素的血浆浓度之间也存在类似的相关性。这些相关性在年龄、性别、种族或肥胖状态方面没有明显差异。通过生物电阻抗分析估计与这些生物标志物的体脂百分比的相关性是相似的那些为BMI.Discussion：自我报告的BMI的准确性是足够的流行病学研究使用疾病的生物标志物，虽然不适合精确的措施肥胖症的患病率。
Objective: The purpose of this study is to evaluate the validity of BMI based on self-reported data by comparison with technician-measured BMI and biomarkers of adiposity.Research Methods and Procedures: We analyzed data from 10,639 National Health and Nutrition Education Study III participants >= 20 years of age to compare BMI calculated from self-reported weight and height with BMI from technician-measured values and body fatness estimated from bioelectrical impedance analysis in relation to systolic blood pressure, fasting blood levels of glucose, high-density lipoprotein-cholesterol, triglycerides, C-reactive protein, and leptin.Results: BMI based on self-reported data (25.07 kg/m(2)) was lower than BMI based on technician measurements (25.52 kg/m(2)) because of underreporting weight (-0.56 kg; 95% confidence interval, -0.71, -0.41) and overreporting height (0.76 cm; 95% confidence interval, 0.64, 0.88). However, the correlations between self-reported and measured BMI values were very high (0.95 for whites, 0.93 for blacks, and 0.90 for Mexican Americans). In terms of biomarkers, self-reported and measured BMI values were equally correlated with fasting blood glucose (r = 0.43), high-density lipoprotein-cholesterol (r = -0.53), and systolic blood pressure (r = 0.54). Similar correlations were observed for both measures of BMI with plasma concentrations of triglycerides and leptin. These correlations did not differ appreciably by age, sex, ethnicity, or obesity status. Correlations for percentage body fat estimated through bioelectrical impedance analysis with these biomarkers were similar to those for BMI.Discussion: The accuracy of self-reported BMI is sufficient for epidemiological studies using disease biomarkers, although inappropriate for precise measures of obesity prevalence.