WAIST AND HIP RATIO
Fat stored in the abdominal region (compared to the legs, arms and hips) is considered to increase the risk of cardiovascular diseases such as coronary heart disease. To measure this we can use a waist to hip ratio, where the measurement of the waist is divided by the measurement from the hips.
Waist - this measurement should be taken just above the naval.
Hip - should be taken at the widest point.
It does not matter which units of measurement you use, as long as it is the same for each measurement.
CALCULATING WAIST TO HIP RATIO AND CLASSIFICATIONS
US National Library of Medicine 2003 Waist to Hip Ratio Classification