The Bias in Self-reported Obesity From 1976 to 2005: A Canada-US Comparison
The Bias in Self-reported Obesity From 1976 to 2005: A Canada-US Comparison
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DOI：
10.1038/oby.2009.206
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发表时间：
2010-02-10
期刊：
影响因子：
6.9
通讯作者：
Tremblay, Mark S.
中科院分区：
文献类型：
--
作者：
Gorber, Sarah Connor;Tremblay, Mark S.
这项研究的目的是确定在加拿大和美国，自我报告的肥胖估计偏差是否随着时间的推移而改变，并遵循不同的模式。使用来自美国国家健康和营养检查调查（NHANES）和加拿大社区健康调查（CCHS）以及加拿大心脏健康调查（CHHS）的三波年龄标准化数据，比较了1976年至2005年报告和测量的身高，体重和肥胖（基于BMI）估计值之间的差异。结果表明，肥胖在这两个国家都有所增加，但美国的比例更高。在美国，自我报告的肥胖和测量的肥胖之间的差异很小，报告的数据低估了测量的患病率约3%;随着时间的推移，这保持相对稳定。在加拿大，这一差距很大，在过去十年中翻了一番（从4%增加到8%）。在美国，自我报告的数据可能更准确地监测肥胖随时间的变化，因为估计值始终保持在测量估计值以下约3%，而在加拿大，仅基于自我报告的身高和体重监测肥胖可能会产生不准确的估计值，因为自我报告和测量数据之间的差异越来越大。
The objective of this study was to determine whether the bias in self-reported estimates of obesity has changed over time and followed different patterns in Canada and the United States. Using age-standardized data from three waves of the National Health and Nutrition Examination Survey (NHANES) in the United States and the Canadian Community Health Survey (CCHS) and the Canadian Heart Health Survey (CHHS) in Canada, discrepancies were compared between reported and measured estimates of height, weight, and obesity (based on the BMI) from 1976 to 2005. Results indicated that obesity increased in both countries, but rates were higher in the United States. The discrepancy between self-reported and measured obesity was small in the United States with reported data underestimating measured prevalence by about 3%; this stayed relatively constant over time. In Canada, the discrepancy was large and doubled in the past decade (from 4 to 8%). In the United States, self-reported data may be more accurate in monitoring changes in obesity over time, as the estimates have consistently remained about 3% below the measured estimates, whereas in Canada, monitoring obesity based solely on self-reported height and weight may produce inaccurate estimates because of the increasing discrepancy between self-reported and measured data.