Body Mass Index Among Youth

Self-reported height and weight has important economic, clinical and research value however little is known on the accuracy of self-reporting BMI among youth. To determine the accuracy of self-reported height and weight estimates compared to measured height and weight used to determine BMI, among youth. In light of the obesity epidemic, determining unhealthy body mass index (BMI), particularly among youth is important, as there are detrimental short and long-term consequences ranging from adverse socialization and increased cardiovascular risk as they transition into adulthood. One of the challenges that researchers often face is the potential trade-off in accuracy between using self-reported compared to measured height and weight to determine BMI. Although measured height and weight is considered the gold standard, it is expensive, requires trained personnel and well-maintained equipment, compared to self-reported data, which is quick, easy to obtain, and cost-effective. The height and weight of each study participant were used to derive two BMI estimates: “self-reported BMI” and “measured BMI”. BMI is described both as a linear variable and categorical variable with 5 levels; underweight <18.5 kg/m2, normal 18.5 to 25.0 kg/m2, overweight 25 to <30 kg/m2, obese 30 to <35 kg/m2 and morbidly obese > 35 kg/m2. Correlation between self-reported and measured BMI was estimated using Pearson’s correlation and linear regression, and agreement was calculated using kappa and weighted kappa test. Accuracy of Self-Reported Height and Weight to Determine Body Mass Index Among Youth Catherine Kreatsoulas

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Last date updated on September, 2024