Body mass index (BMI) is a measure of body fat based on height and weight. It is used to define normal weight, underweight, overweight, and obesity. BMI can be calculated using the formula weight (kg) / height (m2). In Stata, BMI can be calculated using the bmi() function.
BMI is a useful tool for assessing weight status and risk of obesity-related diseases. It is simple to calculate and can be used by healthcare professionals and individuals alike. The development of BMI has been an important milestone in the field of public health, as it has helped to raise awareness of the importance of maintaining a healthy weight.