Body mass index is applicable to each males and females happiness to all or any the age teams. The on top of classification of WHO is for age bracket eighteen years and on top of that. except for infants, youngsters and adolescents, totally different BMI classes ar given by Center for {disease management and Prevention|CDC|agency|federal agency|government agency|bureau|office|authority} (Center of Disease Control and prevention). however it's calculated exploitation constant formula as adult BMI. youngsters and teen’s BMI have to be compelled to be age and sex-specific. It is so, as a result of quantity|the quantity|the number} of body fat changes with age and therefore the amount of body fat differs between ladies and boys.