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Congratulations on this progress, but in my opinion, if you wish to use this model as a preventive method you should think about its accessibility worldwide -- that is, not all populations have easy access to a computer to perform an algorithm in excel. I think it's great that they have thought about how to integrate all the variables that are not usually taken into account, such as ethnicity, as socioeconomic status influences children's diet and physical activity, which is a factor determining the generation of obesity.
Something that I think is important to highlight and should be taken into account in this type of articles is the diet and socioeconomic status of the participants. Data that provide valuable information when assessing signs related to people's nutritional status, as in this case.