Sutcliffe Catherine G, Schultz Kathleen, Brannock Julitta M, Giardiello Francis M, Platz Elizabeth A
Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Room E6132, 615 N. Wolfe St., Baltimore, MD, 21205, USA.
Cancer Causes Control. 2015 Jan;26(1):91-8. doi: 10.1007/s10552-014-0487-y. Epub 2014 Nov 7.
To evaluate associations among self-reported, interviewer-observed, and measured body size in a healthcare setting.
A total of 543 adult men and women undergoing colonoscopy were enrolled into a cross-sectional study conducted from 2002 to 2008 at the Johns Hopkins Hospital Outpatient Center. Self-reported and interviewer-observed Stunkard body size figure numbers and measured body mass index (BMI) were collected and evaluated. The body size figures and BMI were categorized as normal weight, overweight, and obese.
Correlation between self-reported and interviewer-observed body size figure numbers (r = 0.62) was lower than the correlation between self-reported (r = 0.72) or interviewer-observed (r = 0.84) body size figure number and BMI. Participants underestimated body size by about one figure compared with the interviewers (mean 0.92 ± 1.25). Agreement on normal weight, overweight, and obese between the interviewer-observed body size figures and BMI categories (kappa = 0.40) was higher than for the self-reported body size figures and BMI categories (kappa = 0.23). Among participants who judged themselves in the normal weight category by the figures, 38 and 13 % were overweight and obese, respectively, as measured by BMI. Among participants who judged themselves overweight by the body size figures, 57 % were obese as measured by BMI.
Although self-reported body size and measured body size were well correlated, participants underestimated their body size in comparison with interviewers. Many individuals misperceive themselves as normal weight when they are overweight or obese by BMI, which may hinder prevention and control efforts.
评估在医疗环境中自我报告的、访视者观察到的以及测量得到的体型之间的关联。
2002年至2008年在约翰霍普金斯医院门诊中心对543名接受结肠镜检查的成年男女进行了一项横断面研究。收集并评估自我报告的和访视者观察到的斯顿卡德体型数字以及测量得到的体重指数（BMI）。将体型数字和BMI分为正常体重、超重和肥胖三类。
自我报告的和访视者观察到的体型数字之间的相关性（r = 0.62）低于自我报告的（r = 0.72）或访视者观察到的（r = 0.84）体型数字与BMI之间的相关性。与访视者相比，参与者对体型的低估约为一个数字（平均0.92±1.25）。访视者观察到的体型数字与BMI类别之间在正常体重、超重和肥胖方面的一致性（kappa = 0.40）高于自我报告的体型数字与BMI类别之间的一致性（kappa = 0.23）。在那些根据体型数字判断自己为正常体重类别的参与者中，按BMI测量分别有38%和13%为超重和肥胖。在那些根据体型数字判断自己超重的参与者中，按BMI测量有57%为肥胖。
尽管自我报告的体型和测量得到的体型相关性良好，但与访视者相比，参与者低估了自己的体型。许多个体在BMI显示超重或肥胖时却误认为自己是正常体重，这可能会阻碍预防和控制工作。
