9 Factors That Affect Longevity

Slideshow October 14, 2022 at 10:34 AM

Longevity has been increasing over the past century thanks to medical advances and lifestyle improvements. Not only has the average life expectancy increased since 1900, but a larger number of people are living to older ages, driven in part by a steep decline in the high infant mortality rate that characterized the early 1900s.

1. Gender:

According to the Institute and Faculty of Actuaries, mortality rates for females are lower at each age than those of men. Women live longer than men, on average.

The current overall life expectancy for U.S. men is 76.4 years, and 82.9 years for men at age 65. Overall life expectancy for U.S. women is 81.2 years, or 85.5 years for women at age 65.

Some studies attribute this gap in part to riskier behavior among men that may lead to higher rates of accidents.

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2. Genetics:

There appears to be a link between genetic factors and mortality rates. Genetics may play a role in nine of the top 10 causes of death, according to the Centers for Disease Control. The CDC lists the leading causes of death in the United States as:

Heart disease

Cancer

Chronic lower respiratory disease

Accidents

Stroke or cerebrovascular disease

Alzheimer's disease

Diabetes

Influenza and pneumonia

Kidney disease

Intentional self-harm or suicide

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3. Prenatal and childhood conditions:

Poor conditions in utero, at birth and in very early childhood are associated with higher mortality even at advanced ages, according to IFA. The Society of Actuaries has been studying the impact of early childhood conditions on exceptional longevity, including whether growing up in a city or farm environment affects longevity, as well as whether growing up in certain geographic areas is associated with differing life expectancies.

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4. Education:

Higher education levels are linked to higher socio-economic status and both are linked to improved longevity, according to Hall and Peterson.

For those with a bachelor's degree or higher, life expectancy at age 25 increased by 1.9 years for men and 2.8 years for women, according to the CDC. On average, a 25-year-old man without a high school diploma has a life expectancy 9.3 years less than a man with a bachelor's degree or higher. Women with a high school diploma have a life expectancy 8.6 years less than their counterparts with a bachelor's degree or higher, the CDC said.

Higher education levels were also associated with lower levels of obesity and tobacco use, which may correlate with greater longevity, according to CDC data.

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5. Socio-economic status:

As socio-economic status decreases, so does life expectancy, according to the IFA. Among other things, socio-economic status can affect a person's ability to access adequate medical care and their participation in healthier lifestyle habits like exercising more, smoking less and maintaining a healthy weight.

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6. Marital status:

Married people have lower mortality rates than those who were never married, are divorced or are widowed, according to IFA. Various studies suggest that marriage or committed relationships may improve cardiac health, help combat isolation and loneliness that can negatively impact mental health, and motivate people to make healthier choices like keeping regular doctor visits and giving up unhealthy habits.

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7. Ethnicity/migrant status:

The CDC tracks data related to ethnicity and life expectancy. According to 2011 data compiled by the CDC, life expectancy is highest among Hispanic people — both male and female. Life expectancy ranged from 71.7 years for non-Hispanic black males to 83.7 years for Hispanic females.

Ethnicity or migrant status may also be associated with socio-economic status. Mortality of migrant people appears to vary as a result of differences in average mortality between host and home countries, as well as healthy selection for migration or return and length of residence in the host country, IFA said.

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8. Lifestyle:

Historically, lifestyle factors that affect mortality include an unhealthy diet, inadequate exercise, tobacco use, excessive use of alcohol, risky behaviors, food safety, work place safety and motor vehicle safety. Today, the major lifestyle factor that affects mortality is obesity. Nearly 5 percent of adults are considered extremely obese, compared with about 1 percent in 1962; more than 30 percent are considered obese compared with about 13 percent in 1962; and nearly 70 percent of adults are overweight today compared with about 46 percent in 1962.

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9. Medical technology:

Advances in medicine and medical technology have had a major impact on increased longevity. Development of antibiotics and immunizations, as well as improvements in imaging, surgery, cardiac care and organ transplants all have helped push the average life expectancy higher.

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Kristen Beckman

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