This metric is derived by dividing waist circumference by hip circumference, both measured in the same units. For example, an individual with a waist measurement of 30 inches and a hip measurement of 40 inches would have a value of 0.75. This dimensionless ratio offers insights into body fat distribution.
The measure serves as an indicator of health risks associated with abdominal obesity. Higher values are correlated with increased risk of cardiovascular disease, type 2 diabetes, and certain cancers. Its historical significance lies in providing a simple, accessible method for assessing potential health risks without requiring sophisticated equipment.