What is the compression of morbidity theory?
The Compression of Morbidity hypothesis—positing that the age of onset of chronic illness may be postponed more than the age at death and squeezing most of the morbidity in life into a shorter period with less lifetime disability—was introduced by our group in 1980.
What is compression and expansion of morbidity?
The “compression of morbidity” scenario anticipates an increase in life expectancy (LE) and a decrease in the proportion of life spent with serious disease and disability. 4-5 This is achieved when medical advances reduce mortality and case fatality but the disease patterns remain the same.
What is mortality compression?
Compression of mortality is a reduction over time in the variance of age at death. Such reductions are generally accompanied by increases in the mean age at death; otherwise, for the variances to decrease, the death rates above the mean age at death would need to increase, and this has rarely been the case.
What is a morbidity curve?
The lowest survival curve (morbidity) represents the probability of surviving to a given age free of chronic morbidity. The area labeled A under this curve represents the number of person-years that a person in this cohort could expect to survive free of disease (i.e., healthy life expectancy).
What is wear and tear theory?
The wear and tear theory of aging is an idea proposed by German biologist, Dr. August Wiesmann, in 1882. The theory suggests that aging results from a gradual deterioration of the cells and tissues of the body via wear and tear, oxidative stress, exposure to radiation, toxins, or other deteriorative processes.
Who came up with compression of morbidity?
James Fries
The compression of morbidity in public health is a hypothesis put forth by James Fries, professor of medicine at Stanford University School of Medicine. The hypothesis was supported by a 1998 study of 1700 University of Pennsylvania alumni over a period of 20 years.
What is the compression of morbidity and why is it desirable?
Compression of morbidity is a term that means reducing the length of time a person spends sick or disabled. The idea is to maximize healthy lifespan and minimize the time spent less than well (morbidity literally means “being unhealthy”).
What is compression of morbidity quizlet?
Compression of Morbidity. -A shortening of the time a person spends ill or infirm before death; accomplished by postponing illness.
What does morbidity and mortality mean?
Morbidity is when you have a specific illness or condition. Some examples of common morbidities are heart disease, diabetes, and obesity. You can have more than one morbidity at a time. When this happens, it’s called comorbidity. Mortality is the number of deaths due to a specific illness or condition.
What is an example of compression of morbidity?
Think of compression of morbidity like this: if a person’s life expectancy is 80 years but they develop diabetes and congestive heart failure at age 60, that person will spend some 20 years with serious chronic conditions that likely will impact their ability to live independently and enjoy life.
What is cross linking theory?
the concept that biological aging results from functional deterioration of body tissues due to the molecular cross-linkages of and subsequent structural changes in collagen and other proteins. [ proposed in 1942 by Finnish-born U.S. chemist Johan Bjorksten (1907–1995)]