What has the largest effect on life expectancy?

What has the largest effect on life expectancy?

• A. Socio-economic status
• B. Diet
• C. Exercise
• D. Education

Answer: (A)

Understanding life expectancy requires looking at the broader social conditions that shape health over a lifetime. Socio-economic status matters most because it determines access to resources and environments that influence health in multiple ways: medical care, safe housing, nutritious food, stable neighborhoods, education opportunities, and the ability to manage stress. These cumulative advantages or disadvantages across life create big differences in how long people live. Diet and exercise are important for health, but their impact is often limited by resources and surroundings tied to SES—food availability, places to be active, time, and money to invest in healthy habits—so the effect of SES tends to dwarf any single behavioral factor. Education influences health literacy and behavior, yet its contributions to life expectancy are largely intertwined with the broader economic and social resources captured by SES. So the best answer is that socio-economic status has the largest effect on life expectancy because it shapes a wide range of protective and risk factors across the life course.

Understanding life expectancy requires looking at the broader social conditions that shape health over a lifetime. Socio-economic status matters most because it determines access to resources and environments that influence health in multiple ways: medical care, safe housing, nutritious food, stable neighborhoods, education opportunities, and the ability to manage stress. These cumulative advantages or disadvantages across life create big differences in how long people live.

Diet and exercise are important for health, but their impact is often limited by resources and surroundings tied to SES—food availability, places to be active, time, and money to invest in healthy habits—so the effect of SES tends to dwarf any single behavioral factor. Education influences health literacy and behavior, yet its contributions to life expectancy are largely intertwined with the broader economic and social resources captured by SES. So the best answer is that socio-economic status has the largest effect on life expectancy because it shapes a wide range of protective and risk factors across the life course.