elinvuosia

Elinvuosia is a term used in demography and ecology to denote the cumulative measure of life years across individuals in a population or cohort. The word derives from elin, meaning life or organism, and vuosi, year; the plural elinvuosia refers to multiple such units.

Definition and usage

Elinvuosia is defined as the sum of the lifespans of all individuals in a cohort, typically measured in years, and can be expressed as the total life-years or the average life-years per individual (total elinvuosia divided by cohort size). It is analogous to the concept of person-years used in epidemiology and survival analysis.

Application

The metric is used to gauge population vitality and to compare longevity across populations, interventions, or time periods. It helps summarize lifespan data, especially when cohort sizes vary or follow-up lengths differ. Elinvuosia complements life expectancy by focusing on the total amount of life lived rather than only the average.

Relation to other metrics

Life expectancy describes the average remaining years for births or for individuals at a given age, whereas elinvuosia describes the total or average life-years across a group. Years of potential life lost (YPLL) concerns premature mortality; elinvuosia provides a broader sum of survival across the population.

Limitations

As a raw sum, elinvuosia can be influenced by cohort size and censoring, so it is most informative when paired with rate metrics and stratified analyses.

See also

Life expectancy, person-years, years of potential life lost, cohort analysis.