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American Focus > Blog > Tech and Science > Life Expectancy Has Barely Changed in Some US States For More Than a Century : ScienceAlert
Tech and Science

Life Expectancy Has Barely Changed in Some US States For More Than a Century : ScienceAlert

Last updated: May 13, 2025 6:40 pm
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Life Expectancy Has Barely Changed in Some US States For More Than a Century : ScienceAlert
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A Study Reveals Disparities in Life Expectancy Trends Across US States

A recent study has shed light on concerning differences in life expectancy trends across the United States, indicating that states vary significantly in their ability to implement effective public health measures and extend the lifespan of their residents.

Researchers from various institutions in the US and Canada conducted an extensive analysis of over 179 million death records spanning from 1969 to 2020. By utilizing a birth cohort approach to the data, they were able to assess the lifespan of individuals within each generation and extrapolate life expectancy changes from 1900 to 2000.

“Examining mortality trends by cohort provides a more accurate representation of population experiences over time,” explained Theodore Holford, a biostatistician from the Yale School of Public Health (YSPH). “It reveals the long-term effects of policies and social conditions on population health that may not be evident in year-over-year comparisons of mortality rates.”

Female chart
Life expectancies for women varied noticeably from state to state. (Ephemia Nicolakis)

While overall life expectancy increased during the study period, significant disparities were observed among states. States in the South, in particular, showed limited progress over a century of data.

The most substantial gains in life expectancy were seen in northeastern and western states, as well as the District of Columbia (DC). DC, in particular, demonstrated remarkable improvements, with a 30-year increase in life expectancy for women and a 38-year increase for men since 1900.

Male chart
There were also differences for life expectancy in men across states. (Ephemia Nicolakis)

These disparities are indicative of various factors, including socioeconomic conditions, healthcare access, demographic shifts, and local government policies, according to the researchers.

“In certain Southern states, the increase in life expectancy for females was less than three years from 1900 to 2000,” noted Holford. “This stark contrast is evident when compared to states like New York and California, where life expectancy rose by over 20 years during the same period.”

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Significant discrepancies were also observed in mortality rate increases, indicating how quickly the risk of death escalates each year after the age of 35. States like New York, DC, and Florida showed the most favorable outcomes, while Oklahoma, Iowa, and Kansas ranked lowest in this regard.

The researchers hope that their findings will guide policymakers in tailoring interventions to enhance life expectancy, focusing on factors such as healthcare access and environmental protections tailored to the specific needs of different regions.

Unfortunately, cuts to US government funding for healthcare and health research could significantly impede progress in this area.

While pinpointing specific influences on life expectancy from such extensive data is challenging, the study underscores the significant impact of geographic location on lifespan within the US.

“This research underscores the importance of adopting a generational perspective on health,” stated Jamie Tam, a health policy expert at YSPH. “The benefits of health interventions resonate across generations, and neglecting early action and investments in public health can harm future populations.”

The study has been published in JAMA Network Open.

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