Meaning of vital index | Babel Free

Definitions

The ratio of the number of births to the number of deaths in a population over a specific period of time.

Examples

“Now what is the real biological meaning of the vital index? What does it actually measure? It measures always the present worth of the evolutionary survival value of a population, but implies nothing as to how this present worth is brought about. Furthermore, the vital index implies nothing intrinsic in a population.”

“The epidemic of influenza in 1918 was almost exclusively responsible for the decline of the vital index to 36.31% below the figure of 1912.”

CEFR level