This calculator adjusts a PSA test result and a PSA velocity score for differences in body mass index. The calculator takes a man’s actual PSA test score and PSA velocity and estimates what these scores would be if the man had a BMI of 25.
A PSA velocity is a measure of the increase in PSA level from one PSA test to the next. Research indicates that body size and change in body size between PSA tests alters the PSA velocity score.
Obesity is defined as an unhealthy excess of adipose (fat) tissue and we use the body mass index (BMI) measure (weight in Kg/ height in meters2) as a means of classifying people as obese. A person with a BMI of >=30 kg/m2 is classified as obese and a person with a BMI >=25 and <30 kg/m2 is classified as overweight. Granted that BMI does not take into account differences in body composition or waist circumference, but research has shown that BMI does as good a job as waist circumference or body composition measures in predicting cardiovascular risk factors .