kohortlivslängd

Kohortlivslängd, also known as cohort life expectancy, is a demographic measure that estimates the average number of years a person is expected to live, based on the mortality rates of a specific birth cohort. Unlike period life expectancy, which uses current mortality rates for all ages, kohortlivslängd considers how mortality rates for a particular group of people born in the same year have evolved throughout their lives. This approach accounts for changes in mortality that occur over time, such as improvements in healthcare, lifestyle changes, or the impact of historical events.

To calculate kohortlivslängd, demographers track a specific group of individuals born in a particular year from birth until the last member of that cohort dies. They then sum the total number of years lived by all members of the cohort and divide by the number of individuals in the cohort. This provides a more accurate picture of the actual lifespan experienced by that generation.

Kohortlivslängd is a valuable tool for understanding long-term population trends and planning for social security, pensions, and healthcare systems. It highlights the impact of societal advancements and public health interventions on human longevity across generations. For example, a cohort born in the early 20th century will likely have a different kohortlivslängd than a cohort born in the late 20th century due to significant changes in medical technology and living conditions.