Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

We spend more time sick now than a decade ago

14.12.2010
Despite longer life spans, fewer years are disease-free

Increased life expectancy in the United States has not been accompanied by more years of perfect health, reveals new research published in the December issue of the Journal of Gerontology.

Indeed, a 20-year-old today can expect to live one less healthy year over his or her lifespan than a 20-year-old a decade ago, even though life expectancy has grown.

From 1970 to 2005, the probability of a 65-year-old surviving to age 85 doubled, from about a 20 percent chance to a 40 percent chance. Many researchers presumed that the same forces allowing people to live longer, including better health behaviors and medical advances, would also delay the onset of disease and allow people to spend fewer years of their lives with debilitating illness.

But new research from Eileen Crimmins, AARP Chair in Gerontology at the University of Southern California, and Hiram Beltrán-Sánchez, a postdoctoral fellow at the Andrus Gerontology Center at USC, shows that average "morbidity," or, the period of life spend with serious disease or loss of functional mobility, has actually increased in the last few decades.

"We have always assumed that each generation will be healthier and longer lived than the prior one," Crimmins explained. "However, the compression of morbidity may be as illusory as immortality."

While people might be expected to live more years with disease simply as a function of living longer in general, the researchers show that the average number of healthy years has decreased since 1998. We spend fewer years of our lives without disease, even though we live longer.

A male 20-year-old in 1998 could expect to live another 45 years without at least one of the leading causes of death: cardiovascular disease, cancer or diabetes. That number fell to 43.8 years in 2006, the loss of more than a year. For young women, expected years of life without serious disease fell from 49.2 years to 48 years over the last decade.

At the same time, the number of people who report lack of mobility has grown, starting with young adults. Functional mobility was defined as the ability to walk up ten steps, walk a quarter mile, stand or sit for 2 hours, and stand, bend or kneel without using special equipment.

A male 20-year-old today can expect to spend 5.8 years over the rest of his life without basic mobility, compared to 3.8 years a decade ago — an additional two years unable to walk up ten steps or sit for two hours. A female 20-year-old can expect 9.8 years without mobility, compared to 7.3 years a decade ago.

"There is substantial evidence that we have done little to date to eliminate or delay disease while we have prevented death from diseases," Crimmins explained. "At the same time, there have been substantial increases in the incidences of certain chronic diseases, specifically, diabetes."

From 1998 to 2006, the prevalence of cardiovascular disease increased among older men, the researchers found. Both older men and women showed an increased prevalence of cancer. Diabetes increased significantly among all adult age groups over age 30.

The proportion of the population with multiple diseases also increased.

"The increasing prevalence of disease may to some extent reflect better diagnostics, but what it most clearly reflects is increasing survival of people with disease," Crimmins said. "The cost of maintaining and providing care for people with chronic conditions is an important part of determining the economic well-being of countries with established social security and government-provided health services."

Crimmins and Beltrán-Sánchez note that only delaying the onset of disease through preventive care will clearly lead to longer disease-free lives.

"The growing problem of lifelong obesity and increases in hypertension and high cholesterol are a sign that health may not be improving with each generation," Crimmins said. "We do not appear to be moving to a world where we die without experiencing significant periods of disease, functioning loss, and disability."

Crimmins and Beltrán-Sánchez. "Mortality and Morbidity Trends: Is There Compression of Morbidity?" Journal of Gerontology: 2010.

To request a copy of the full article or an interview with Professor Eileen Crimmins, contact Suzanne Wu at suzanne.wu@usc.edu

Suzanne Wu | EurekAlert!
Further information:
http://www.usc.edu

More articles from Studies and Analyses:

nachricht Europe’s Demographic Future. Where the Regions Are Heading after a Decade of Crises
10.08.2017 | Berlin-Institut für Bevölkerung und Entwicklung

nachricht Scientists reveal source of human heartbeat in 3-D
07.08.2017 | University of Manchester

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

What the world's tiniest 'monster truck' reveals

23.08.2017 | Life Sciences

Treating arthritis with algae

23.08.2017 | Life Sciences

Witnessing turbulent motion in the atmosphere of a distant star

23.08.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>