Nawaz H, Chan W, Abdulrahman M, Larson D, Katz D L
Yale-Griffin Prevention Research Center, Derby CT 06418, USA.
Am J Prev Med. 2001 May;20(4):294-8. doi: 10.1016/s0749-3797(01)00293-8.
Self-reported weight and height are under- and over-reported, respectively, in epidemiologic studies. This tendency, which may adversely affect study operations, has not been evaluated among subjects being enrolled into a weight-loss program.
Self-reported weight, height, and body mass index (BMI) were compared to measured values in 97 overweight or obese (BMI>27.3) women being enrolled into a randomized, controlled trial of two behavioral interventions for weight loss. The effects of demographic factors, baseline weight, baseline height, and baseline BMI on weight and height reporting were assessed.
There was a significant difference between measured and reported weight (mean difference=-3.75 lb, p=0.0001) and height (mean difference=+0.35 in., p=0.0007). The mean difference between measured and reported BMI was -1.14 kg/m(2) (p=0.0001). Unemployed, retired, or disabled women were more likely to under-report their BMI than employed women (p=0.001). Six percent of subjects who were initially considered eligible for the study on the basis of the self-report were eventually excluded from the study because they did not meet the inclusion criterion for BMI.
Obese women who seek weight-loss assistance tend to under-report their weight and over-report their height, suggesting that self-reported data are likely to be inaccurate. Misreporting is apparently influenced by employment and disability and has the potential to complicate recruitment of subjects for research studies.
在流行病学研究中，自我报告的体重往往被少报，而身高则往往被多报。这种倾向可能会对研究操作产生不利影响，但尚未在参加减肥计划的受试者中进行评估。
将97名超重或肥胖（BMI>27.3）女性在参加一项针对两种减肥行为干预措施的随机对照试验时自我报告的体重、身高和体重指数（BMI）与测量值进行比较。评估了人口统计学因素、基线体重、基线身高和基线BMI对体重和身高报告的影响。
测量体重与报告体重之间存在显著差异（平均差异=-3.75磅，p=0.0001），测量身高与报告身高之间也存在显著差异（平均差异=+0.35英寸，p=0.0007）。测量BMI与报告BMI之间的平均差异为-1.14kg/m²（p=0.0001）。失业、退休或残疾女性比在职女性更有可能少报她们的BMI（p=0.001）。最初根据自我报告被认为符合研究条件的受试者中，有6%最终被排除在研究之外，因为他们不符合BMI纳入标准。
寻求减肥帮助的肥胖女性往往少报体重、多报身高，这表明自我报告的数据可能不准确。误报显然受就业和残疾情况的影响，并且有可能使研究受试者的招募工作复杂化。
