Radetti G, et al. - Researchers compared the accuracy of the different indexes of adiposity and/or body composition in 1,332 obese children and adolescents (778 females and 554 males), aged 14.4 ± 1.8 yrs, in order to recognize the most reliable. They assessed the following indexes for each subject: BMI, BMI SDS, fat-free mass index (FFMI), fat mass index (FMI), tri-ponderal mass index (TMI), waist-to-height ratio (WtHR) and a new one, the body mass fat index (BMFI), which normalizes the BMI for percentage of body fat and the waist circumference. All the indexes had a good correlation. Outcomes revealed the comparable performance of BMI (which neither considers body composition nor fat distribution) to other indexes, and hence, they support it to be the preferred one, also because of the easiness of its calculation.