What does life expectancy measure?

Life expectancy measures the average length of life individuals can expect to live in a given population. This statistic is typically calculated based on the mortality rates of a population, taking into account age-specific death rates. It provides an essential insight into the overall health and longevity of a population, reflecting factors such as healthcare access, lifestyle choices, and socio-economic conditions.

By focusing on individual longevity rather than population growth, prevalence of diseases, or healthcare access, life expectancy serves as a crucial indicator for public health. It allows researchers and policymakers to assess the effectiveness of health interventions and address the factors contributing to health disparities within different demographic groups. This information is vital for planning health services and allocating resources to improve the well-being of the population.