Élettartamértéke

Élettartamértéke, also known as life expectancy, is a statistical measure of the average age at which members of a particular population are expected to die. It is a key indicator of the health and well-being of a population and is often used to compare the quality of life and healthcare systems between different countries or regions.

Life expectancy at birth is the most commonly reported measure and refers to the average number of years a person can expect to live from birth, given the current mortality rates. It takes into account the mortality rates at each age and is calculated using life tables, which provide the probability of dying at each age.

Several factors influence life expectancy, including genetics, lifestyle choices, environmental factors, and access to healthcare. Improvements in healthcare, nutrition, and living conditions have led to increases in life expectancy over time. However, disparities in life expectancy exist between different populations, with wealthier countries generally having higher life expectancies.

Life expectancy is not a fixed value but can change over time due to various factors such as disease outbreaks, economic conditions, and public health policies. It is an important metric for policymakers, healthcare providers, and researchers to monitor and improve public health outcomes.