Public health The<unk>  is generally used as a means of correlation between groups related by general<unk>  and can serve as a vague means of estimating adiposity. The duality of the<unk>  is that, while it is easy to use as a general calculation, it is limited as to how accurate and pertinent the data obtained from it can be. Generally, the<unk>  is suitable for recognizing trends within sedentary or overweight individuals because there is a smaller margin of error. The<unk>  has been used by the WHO as the standard for recording obesity statistics since the early 1980s. This general correlation is particularly useful for consensus data regarding obesity or various other conditions because it can be used to build a semi-accurate representation from which a solution can be stipulated, or the RDA for a group can be calculated. Similarly, this is becoming more and more pertinent to the growth of children, since the majority of children are sedentary. Cross-sectional studies indicated that sedentary people can decrease<unk>  by becoming more physically active. Smaller effects are seen in prospective cohort studies which lend to support active mobility as a means to prevent a further increase in<unk> . Clinical practice<unk>  categories are generally regarded as a satisfactory tool for measuring whether sedentary individuals are underweight, overweight, or obese with various exceptions, such as athletes, children, the elderly, and the infirm. Also, the growth of a child is documented against a<unk> -measured growth chart. Obesity trends can then be calculated from the difference between the child's<unk>  and the<unk>  on the chart. In the United States,<unk>  is also used as a measure of underweight, owing to advocacy on behalf of those with eating disorders, such as anorexia nervosa and bulimia nervosa. Legislation In France, Italy, and Spain, legislation has been introduced banning the usage of fashion show models having a<unk>  below 18. In Israel, a<unk>  below 18.5 is banned. This is done to fight anorexia among models and people interested in fashion.
Body mass index
Body adiposity index
Obesity
Lean body mass
Family history 
Body fat percentage
Body composition
Sedentary lifestyle