Corpulence index
The Corpulence Index (CI) (also Ponderal Index (PI), Rohrer's Index, Tri-ponderal Mass Index, or Triponderal Mass Index (TMI)) is a measure of corpulence, or of leanness in other variants, of a person calculated as a relationship between mass and height. It was first proposed in 1921 as the "Corpulence measure" by Swiss physician Fritz Rohrer and hence is also known as Rohrer's Index.