Comparison Between Self-reported and Measured Height, Weight and BMI in Spanish University Students: Relationships With Body and Trunk Fat Mass

Objective: Validity of self-reported height and weight has not been adequately evaluated in diverse young populations. This study aims to examine the accuracy of self-reported weight, height, and BMI values in Spanish university students, as well as related factors that may determine the BMI in such population. Methods: Weight and height were self reported and measured in 68 university students between 18-24 years from the area of Extremadura, Spain. BMI was calculated from both, reported and measured values. Additionally, percentage body/trunk fat was measured using bioelectrical impedance analysis (BIA). Finally, hip and waist circumference were obtained using standard procedures. Results: there were no differences between self-reported and measured BMI (p > 0.05). In the multiple regression analysis (stepwise) weight (p < 0.0001) and height (p < 0.01) were the main determinants of self-reported BMI. Conclusion: self reported BMI correctly estimates the real BMI in Spanish university students.