Nyholm Maria, Gullberg Bo, Merlo Juan, Lundqvist-Persson Cristina, Råstam Lennart, Lindblad Ulf
Skaraborg Institute, Skovde, Sweden.
Obesity (Silver Spring). 2007 Jan;15(1):197-208. doi: 10.1038/oby.2007.536.
To validate self-reported information on weight and height in an adult population and to find a useful algorithm to assess the prevalence of obesity based on self-reported information.
This was a cross-sectional survey consisting of 1703 participants (860 men and 843 women, 30 to 75 years old) conducted in the community of Vara, Sweden, from 2001 to 2003. Self-reported weight, height, and corresponding BMI were compared with measured data. Obesity was defined as measured BMI > or = 30 kg/m2. Information on education, self-rated health, smoking habits, and physical activity during leisure time was collected by a self-administered questionnaire.
Mean differences between measured and self-reported weight were 1.6 kg (95% confidence interval, 1.4; 1.8) in men and 1.8 kg (1.6; 2.0) in women (measured higher), whereas corresponding differences in height were -0.3 cm (-0.5; -0.2) in men and -0.4 cm (-0.5; -0.2) in women (measured lower). Age and body size were important factors for misreporting height, weight, and BMI in both men and women. Obesity (measured) was found in 156 men (19%) and 184 women (25%) and with self-reported data in 114 men (14%) and 153 women (20%). For self-reported data, the sensitivity of obesity was 70% in men and 82% in women, and when adjusted for corrected self-reported data and age, it increased to 81% and 90%, whereas the specificity decreased from 99% in both sexes to 97% in men and 98% in women.
The prevalence of obesity based on self-reported BMI can be estimated more accurately when using an algorithm adjusted for variables that are predictive for misreporting.
验证成年人群自我报告的体重和身高信息，并找到一种基于自我报告信息评估肥胖患病率的有效算法。
这是一项横断面调查，于2001年至2003年在瑞典瓦拉社区开展，共有1703名参与者（860名男性和843名女性，年龄在30至75岁之间）。将自我报告的体重、身高及相应的体重指数（BMI）与测量数据进行比较。肥胖定义为测量的BMI≥30kg/m²。通过自填问卷收集有关教育程度、自我评定健康状况、吸烟习惯及休闲时间身体活动的信息。
男性测量体重与自我报告体重的平均差异为1.6kg（95%置信区间为1.4；1.8），女性为1.8kg（1.6；2.0）（测量值更高），而相应的身高差异男性为-0.3cm（-0.5；-0.2），女性为-0.4cm（-0.5；-0.2）（测量值更低）。年龄和体型是男性和女性误报身高、体重及BMI的重要因素。测量发现156名男性（19%）和184名女性（25%）肥胖，自我报告数据显示114名男性（14%）和153名女性（20%）肥胖。对于自我报告数据，男性肥胖的敏感性为70%，女性为82%，在根据校正后的自我报告数据和年龄进行调整后分别增至81%和90%，而特异性则从两性均为99%降至男性为97%、女性为98%。
使用针对预测误报的变量进行调整的算法时，基于自我报告BMI的肥胖患病率能够得到更准确的估计。
