What are the cut-offs of BMI percentiles to define underweight, normality, risk of obesity and obesity (and its subclasses) in children and adolescents?
Underweight BMI-for-age <5thpercentile. Normal weight BMI-for-age between 5th percentile and 90 percentile. At risk of overweight BMI-for-age between 90th percentile and 97th percentile Overweight BMI-for-age > 97th percentile. BMI decreases during the preschool years, then increases into adulthood.