Sexual Orientation and Bias in Self-Reported BMI
Sexual Orientation and Bias in Self-Reported BMI
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DOI：
10.1038/oby.2012.9
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发表时间：
2012-08-01
期刊：
影响因子：
6.9
通讯作者：
Austin, S. Bryn
中科院分区：
文献类型：
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作者：
Richmond, Tracy K.;Walls, Courtney E.;Austin, S. Bryn
我们的目的是确定性取向群体在根据自我报告的身高和体重计算的BMI （kg/m(2)）的准确性上是否存在差异，以及体重状况是否会改变可能的差异。利用性别分层多元线性回归分析全国青少年健康纵向研究（n = 12,197）的第三波，我们检验了性取向与自我报告的身高和体重（自我报告的BMI）计算的BMI之间的关系，控制了客观测量的身高和体重（客观测量的BMI）计算的BMI以及人口统计学、健康和行为变量。我们通过客观测量BMI来检验性取向和自我报告BMI之间关系的效应修正。人群低估了他们的BMI（女性：beta = 0.87, P < 0.001；男性= 0.86,P < 0.001）。性取向群体在报告的准确性上差别不大；与异性恋同龄人相比，只有男同性恋者有明显的漏报（beta = -0.37, P = 0.038）。我们没有发现客观测量BMI对性取向和自我报告的BMI之间的关系有影响的证据。除了男同性恋者外，性取向群体在低报BMI方面是一致的，因此在大多数基于自我报告的体重状况比较中提供了信心。男同性恋者自我报告的体重和身高可能夸大了男同性恋者和异性恋者在体重指数上的差异。
Our objective was to determine if sexual orientation groups differ in accuracy of BMI (kg/m(2)) calculated from self-reported height and weight and if weight status modifies possible differences. Using gender-stratified multiple linear regression to analyze Wave III of the National Longitudinal Study of Adolescent Health (n = 12,197), we examined the association of sexual orientation with BMI calculated from self-reported height and weight (self-reported BMI), controlling for BMI calculated from objectively measured height and weight (objectively measured BMI) as well as demographic, health, and behavioral variables. We tested for effect modification of the relationship between sexual orientation and self-reported BMI by objectively measured BMI. The population underestimated their BMI (females: beta = 0.87, P < 0.001; males = 0.86, P < 0.001). Sexual orientation groups differed little in their accuracy of reporting; only gay males had significant underreporting (beta = -0.37, P = 0.038) relative to their heterosexual peers. We found no evidence of effect modification of the relationship of sexual orientation and self-reported BMI by objectively measured BMI. With the exception of gay males, sexual orientation groups are consistent in their underreporting of BMI thus providing confidence in most comparisons of weight status based on self-report. Self-reporting of weight and height by gay males may exaggerate the differences in BMI between gay and heterosexual males.