Inaccurate weight perception is associated with extreme weight-management practices in U.S. high school students.
Inaccurate weight perception is associated with extreme weight-management practices in U.S. high school students.
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DOI：
10.1097/mpg.0000000000000231
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发表时间：
2014-03
影响因子：
2.9
通讯作者：
St George DM
中科院分区：
文献类型：
--
作者：
Ibrahim C;El-Kamary SS;Bailey J;St George DM
研究青少年的体重感知准确性（WPA）是否与不同体重指数（BMI）类别的极端体重管理实践（EWP）相关。WPA，高估和低估是通过比较2009年全国青年风险行为调查中美国高中生自我报告的BMI和体重感知来确定的。BMI分为：体重不足（<第5百分位数）、健康体重（第5-<第85百分位数）、超重（≥第85-<第95百分位数）和肥胖（≥第95百分位数）。如果BMI和体重感知不一致，则认为WPA不准确。高估者认为他们比实际重（在体重不足/健康组中）;低估者认为他们比实际轻（在健康/超重/肥胖组中）。EWP包括禁食、使用减肥药或使用泻药中的一种或多种。Logit模型适用于不同BMI性别分层。在最终的14,722名美国高中生完整数据样本中，20.2%，85.7%，5.8%和80.9%的体重过轻，健康体重，超重和肥胖分别不准确地评估了他们的体重。反过来，11.4%和17.6%的准确和不准确的评估人员分别从事EWP。调整后，体重过轻的女性高估了自己的体重，EWP的几率高出12.6倍（95% CI：3.4-46.6）。此外，在过度评估体重的健康体重学生中，EWP的几率也会升高。过度评估健康体重的学生和体重不足的女孩有更高的3 EWP的几率，可能与不健康的减肥欲望有关。这项研究表明，有必要进一步教育临床医生对WPA及其与EWP的关系，即使是那些健康体重的人，他们可能被视为无风险。
To examine whether adolescents’ weight perception accuracy (WPA) was associated with extreme weight-management practices (EWPs) in differing body mass index (BMI) categories. WPA, overassessment, and underassessment were determined by comparing self-reported BMI and weight perception among US high-school students in the 2009 National Youth Risk Behavior Survey. BMI was classified as: underweight (<5th percentile), healthy weight (5th–<85th), overweight (≥85th–<95th), and obese (≥95th). WPA was considered inaccurate if BMI and weight perception were discordant. Overassessors thought they were heavier than they were (among underweight/healthy groups); underassessors thought they were lighter than they were (among healthy/overweight/obese groups). EWPs included one or more of fasting, use of diet pills, or purging/laxative use. Logit models were fitted for different BMI sex strata. In the final sample of 14,722 US high-school students with complete data, 20.2%, 85.7%, 5.8%, and 80.9% of those who were underweight, healthy weight, overweight, and obese, inaccurately assessed their weight, respectively. In turn, 11.4% and 17.6% of accurate and inaccurate assessors engaged in EWPs, respectively. After adjustment, underweight females who overassessed their weight had 12.6 times higher odds of EWPs (95% CI: 3.4–46.6). Also, there were elevated odds of EWPs among healthy weight students who overassessed their weight. Overassessing healthy weight students and underweight girls had higher odds of 3 EWPs, likely related to an unhealthy desire to lose weight. This study demonstrates a need to further educate clinicians on WPA and its relationship to EWPs even among those of healthy weight who may be seen as non-risk.