Old age consists of ages nearing or surpassing the life expectancy of human beings, and thus the end of the human life cycle. Euphemisms and terms for old people include, old people (worldwide usage), seniors (American usage), senior citizens (British and American usage), older adults (in the social sciences), the elderly, and elders (in many cultures including the cultures of aboriginal people).
Old people often have limited regenerative abilities and are more prone to disease, syndromes, and sickness than younger adults. The organic process of ageing is called senescence, the medical study of the aging process is gerontology, and the study of diseases that afflict the elderly is geriatrics. The elderly also face other social issues such as retirement, loneliness, and ageism.
The chronological age denoted as “old age” varies culturally and historically. Thus, old age is "a social construct" rather than a definite "biological stage".
- 1 Definitions
- 2 Marks of old age
- 3 Old age frailty
- 4 Demographic changes
- 5 Psychosocial aspects
- 6 Life expectancy
- 7 Old age benefits
- 8 Assistance: devices and personal
- 9 See also
- 10 References
- 11 External links
Definitions of old age include official definitions, popular definitions, sub-group definitions, and four dimensions as follows.
Old age comprises “the later part of life; the period of life after youth and middle age . . . , usually with reference to deterioration”
When old age begins cannot be universally defined because it shifts according to the context. The United Nations has agreed that 60+ years may be usually denoted as old age, and this is the first attempt at an international definition of old age. However, for its study of old age in Africa, the World Health Organization (WHO) set 50 as the beginning of old age. At the same time, the WHO recognized that the developing world often defines old age, not by years, but by new roles, loss of previous roles, or inability to make active contribution to society.
Most developed Western countries set the age of 60 to 65 for retirement and old-age social programs eligibility. However, various countries and societies reckon the onset of old age as anywhere from the mid-40s to the 70s. Furthermore, the fact that life expectancy beyond 80 has become widespread has shifted definitions of old age.
A Pew Research Center study of 2,929 Americans, age 18+, found that they hold very different definitions of old age. Respondents under 30 said that old age begins at 60, but respondents 65+ said 74.
Most Britons define old age as starting at 59 according to a survey of 2,200 people in the UK. The under 25s reckon 54 as the beginning of old age. The 80+ define old age as starting at 68. Another survey concluded that most Britons define the onset of old age as almost 70. Europeans on average set the start of old age at 62.
Gerontologists have recognized the very different conditions that people experience as they grow older within the years defined as old age. In the United States, most people in their 60s and 70s are in the best shape they have known. However, by their 80s most of these people will become frail, a condition marked by serious mental and physical debilitation.
Therefore, rather than lumping together all people who have been defined as old, some gerontologists have recognized the diversity of old age by defining sub-groups. One study distinguishes the young old (60 to 69), the middle old (70 to 79), and the very old (80+). Another study’s sub-grouping is young-old ( 65 to 74), middle-old (75–84), and oldest-old (85+). A third sub-grouping is “young old” (65-74), “old” (74-84), and "old-old" (85+). Delineating sub-groups in the 65+ population enables a more accurate portrayal of significant life changes.
Old age comprises the four dimensions: chronological, biological, psychological, and social. Chronological age may differ considerably from a person’s functional age. The distinguishing marks of old age normally occur in all five senses at different times and different rates for different persons. In addition to chronological age, people can be considered old because of the other three dimensions of old age. For example, people may be considered old when they become grandparents or when they begin to do less or different work in retirement.
Marks of old age
The distinguishing marks associated with old age comprise both physical and mental characteristics. The marks of old age are so unlike the marks of middle age that it has been suggested that, as an individual transitions into old age, he/she might well be thought of as different persons “time-sharing” the same identity.
These marks do not occur at the same chronological age for everyone. They, also, occur at different rates and order for different people. Because each person is unique, marks of old age vary between people, even those of the same chronological age.
A basic mark of old age that affects both body and mind is “slowness of behavior.” This “slowing down principle” finds a correlation between advancing age and slowness of reaction and task performance, both physical and mental.
Physical marks of old age
Physical marks of old age include the following:
- Bone and joint. Old bones are marked by “thinning and shrinkage.” This results in a loss of height (about two inches by age 80), a stooping posture in many people, and a greater susceptibility to bone and joint diseases such as osteoarthritis and osteoporosis.
- Chronic diseases. Most older persons have at least one chronic condition and many have multiple conditions. In 2007-2009, the most frequently occurring conditions among older persons in the United States were uncontrolled hypertension (34%), diagnosed arthritis (50%), and heart disease (32%).
- Dental problems. Less saliva and less ability for oral hygiene in old age increases the chance of tooth decay and infection.
- Digestive system. About 40% of the time, old age is marked by digestive disorders such as difficulty in swallowing, inability to eat enough and to absorb nutrition, constipation and bleeding.
- Eyesight. Diminished eyesight makes it more difficult to read in low lighting and in smaller print. Speed with which an individual reads and the ability to locate objects may also be impaired.
- Falls. Old age spells risk for injury from falls that might not cause injury to a younger person. Every year, about one third of 65 years olds and over half of 80 years old fall. Falls are the leading cause of injury and death for old people.
- Hair usually becomes thinner and grayer.
- Hearing. By age 75 and older, 48% of men and 37% of women encounter impairments in hearing. Of the 26.7 million people over age 50 with a hearing impairment, only one in seven uses a hearing aid.
- Hearts are less efficient in old age with a resulting loss of stamina.
- Lungs expand less well; thus, they provide less oxygen.
- Pain afflicts old people at least 25% of the time, increasing with age up to 80% for those in nursing homes. Most pains are rheumatological or malignant.
- Sexual activity decreases significantly with age, especially after age 60, for both women and men. Sexual drive in both men and women decreases as they age.
- Skin loses elasticity, becomes drier, and more lined and wrinkled.
- Sleep trouble holds a chronic prevalence of over 50% in old age and results in daytime sleepiness. In a study of 9,000 persons with a mean age of 74, only 12% reported no sleep complaints. By age 65, deep sleep goes down to about 5%.
- Taste buds diminish so that by age 80 taste buds are down to 50% of normal. Food becomes less appealing and nutrition can suffer.
- Urinary incontinence is often found in old age.
- Voice. In old age, vocal chords weaken and vibrate more slowly. This results in a weakened, breathy voice that is sometimes called an “old person’s voice.”
Mental marks of old age
Mental marks of old age include the following.
- Adaptable describes most people in their old age. In spite the stressfulness of old age, they are described as “agreeable” and “accepting.” However, old age dependence induces feelings of incompetence and worthlessness in a minority.
- Caution marks old age. This antipathy toward “risk-taking” stems from the fact that old people have less to gain and more to lose by taking risks than younger people.
- Depressed mood. According to Cox, Abramson, Devine, and Hollon (2012), old age is a risk factor for depression caused by prejudice (i.e., “deprejudice”). When people are prejudiced against the elderly and then become old themselves, their anti-elderly prejudice turns inward, causing depression. “People with more negative age stereotypes will likely have higher rates of depression as they get older.” Old age depression results in the over-65 population having the highest suicide rate.
- Fear of crime in old age, especially among the frail, sometimes weighs more heavily than concerns about finances or health and restricts what they do. The fear persists in spite of the fact that old people are victims of crime less often than younger people.
- Mental disorders afflict about 15% of people aged 60+ according to estimates by the World Health Organization. Another survey taken in 15 countries reported that mental disorders of adults interfered with their daily activities more than physical problems.
- Reduced mental and cognitive ability afflicts old age. Memory loss is common in old age due to the decrease in speed of information being encoded, stored, and received. It takes more time to learn new information. Dementia is a general term for memory loss and other intellectual abilities serious enough to interfere with daily life. Its prevalence increases in old age from about 10% at age 65 to about 50% over age 85. Alzheimer's disease accounts for 50 to 80 percent of dementia cases. Demented behavior can include wandering, physical aggression, verbal outbursts, depression, and psychosis.
- Set in one’s ways describes a mind set of old age. A study of over 400 distinguished men and women in old age found a “preference for the routine.” Explanations include old age’s toll on the “fluid intelligence” and the “more deeply entrenched” ways of the old.
Old age frailty
Most people in the age range of 60-80 (the years of retirement and early old age), enjoy rich possibilities for a full life, but the condition of frailty distinguished by “bodily failure” and greater dependence becomes increasingly after that.
A group of geriatricians proposed a general definition of frailty as “a physical state of increased vulnerability to stressors that results from decreased reserves and disregulation in multiple physiological systems.”
Prevalence of frailty
Frailty is a common condition in later old age, but different definitions of frailty produce diverse assessments of prevalence. One study placed the incidence of frailty for ages 65+ at 10.7%. Another study placed the incidence of frailty in age 65+ population at 22% for women and 15% for men. A Canadian study illustrated how frailty increases with age and calculated the prevalence for 65+ as 22.4% and for 85+ as 43.7%.
A worldwide study of “patterns of frailty” based on data from 20 nations found (a) a consistent correlation between frailty and age, (b) a higher frequency among women, and (c) more frailty in wealthier nations where greater support and medical care increases longevity.
In Norway, a 20 year longitudinal study of 400 people found that bodily failure and greater dependence became prevalent in the 80+ years. The study calls these years the “fourth age” or “old age in the real meaning of the term.” Similarly, the “Berlin Aging Study” rated over-all functionality on four levels: good, medium, poor, and very poor. People in their 70s were mostly rated good. In the 80-90 year range, the four levels of functionality were divided equally. By the 90-100 year range, 60% would be considered frail because of very poor functionality and only 5% still possessed good functionality.
Markers of frailty
Three unique markers of frailty have been proposed: (a) loss of any notion of invincibility, (b) loss of ability to do things essential to one’s care, and (c) loss of possibility for a subsequent life stage.
Old age survivors on-average deteriorate from agility in their 65-80s to a period of frailty preceding death. This deterioration is gradual for some and precipitous for others. Frailty is marked by an array of chronic physical and mental problems which means that frailty is not treatable as a specific disease. These problems coupled with increased dependency in the basic activities of daily living (ADLs) required for personal care add emotional problems: depression and anxiety. In sum, frailty has been depicted as a group of “complex issues,” distinct but “causally interconnected,” that often include “comorbid diseases,”, progressive weakness, stress, exhaustion, and depression.
Misconceptions of frail people
Johnson and Barer did a pioneering study of Life Beyond 85 Years by interviews over a six year period. In talking with 85+ year olds, they found some popular conceptions about old age to be erroneous. Many studies of old age overlook the 85+ survivors so their conclusions do not apply. Such erroneous conceptions include (1) people in old age have a least one family member for support, (2) old age well-being requires social activity, and (3) “successful adaptation” to age-related changes demands a continuity of self-concept. In their interviews, Johnson and Barer found that 24% of the 85+ had no face-to-face family relationships; many have outlived their families. Second, that contrary to popular notions, the interviews revealed that the reduced activity and socializing of the over 85s does not harm their well-being; they “welcome increased detachment.” Third, rather than a continuity of self-concept, as the interviewees faced new situations they changed their “cognitive and emotional processes” and reconstituted their “self–representation.”
Care and costs
Frail people require a high level of care. Medical advances have made it possible to “postpone death” for years. This added time costs many frail people “prolonged sickness, dependence, pain, and suffering.”
Medical treatments in the final days are not only economically costly, they are often unnecessary, even harmful. Nortin Hadler, M.D. warns against the tendency to medicalize and overtreat the frail. In her Choosing Medical Care in Old Age, Muriel R. Gillick M.D. argues that appropriate medical treatment for the frail is not the same as for the robust. The frail are vulnerable to “being tipped over” by any physical stress put on the system such as medical interventions.
Death and frailty
Old age, death, and frailty are linked because approximately half the deaths in old age are preceded by months or years of frailty,
Older Adults' Views on Death is based on interviews with 109 people in the 70-90 age range, with a mean age of 80.7. Almost 20% of the people wanted to use whatever treatment that might postpone death. About the same number said that given a terminal illness, they would choose assisted suicide. Roughly half chose doing nothing except live day by day until death comes naturally without medical or other intervention designed to prolong life. This choice was coupled with a desire to receive palliative care if needed.
About half of older adults suffer multimorbidity, that is, they have three or more chronic conditions. Medical advances have made it possible to “postpone death,” but in many cases this postponement adds “prolonged sickness, dependence, pain, and suffering,” a time that is costly in social, psychological, economic terms.
The longitudinal interviews of 150 age 85+ people summarized in Life Beyond 85 Years found “progressive terminal decline” in the year prior to death: constant fatigue, much sleep, detachment from people, things, and activities, simplified lives. Most of the interviewees did not fear death; some would welcome it. One person said, “living this long is pure hell.” However, nearly everyone feared a long process of dying. Some wanted to die in their sleep; others wanted to die “on their feet.”
The study of Older Adults' Views on Death found that the more frail people were, the more “pain, suffering, and struggles” they were enduring, the more likely they were to “accept and welcome” death as a release from their misery. Their fear about the process of dying was that it would prolong their distress. Besides being a release from misery, some saw death as a way to reunion with departed loved ones. Others saw death as a way to free their caretakers from the burden of their care.
In the industrialized countries, life expectancy and, thus, the old age population have increased consistently over the last decades. In the United States the proportion of people aged 65 or older increased from 4% in 1900 to about 12% in 2000. In 1900, only about 3 million of the nation's citizens were 65 or older (out of 76 million total American citizens). By 2000, the number of senior citizens had increased to about 35 million (of 280 million US citizens). Population experts estimate that more than 50 million Americans—about 17 percent of the population—will be 65 or older in 2020. By 2050, it is projected that at least 400,000 Americans will be 100 or older.
The number of old people is growing around the world chiefly because of the post–World War II baby boom and increases in the provision and standards of health care. By 2050, 33% of the developed world’s population and almost 20% of the less developed world’s population will be over 60 years old.
The growing number of people living to their 80s and 90s in the developed world has strained public welfare systems and has also resulted in increased incidence of diseases like cancer and dementia that were rarely seen in premodern times. When the United States Social Security program was created, persons older than 65 numbered only around 5% of the population and the average life expectancy of a 65 year old in 1936 was approximately 5 years, while in 2011 it could often range from 10–20 years. Other issues that can arise from an increasing population are growing demands for health care and an increase in demand for different types of services.
Of the roughly 150,000 people who die each day across the globe, about two thirds—100,000 per day—die of age-related causes. In industrialized nations, the proportion is much higher, reaching 90%.
According to Erik Erikson’s "Eight Stages of Life" theory, the human personality is developed in a series of eight stages that take place from the time of birth and continue on throughout an individual’s complete life. He characterises old age as a period of "Integrity vs. Despair", during which a person focuses on reflecting back on his life. Those who are unsuccessful during this phase will feel that their life has been wasted and will experience many regrets. The individual will be left with feelings of bitterness and despair. Those who feel proud of their accomplishments will feel a sense of integrity. Successfully completing this phase means looking back with few regrets and a general feeling of satisfaction. These individuals will attain wisdom, even when confronting death. Coping is a very important skill needed in the aging process to move forward with life and not be 'stuck' in the past. The way a person adapts and copes, reflects his aging process on a psycho-social level.
Newman & Newman proposed a ninth stage of life, Elderhood. Elderhood refers to those individuals who live past the life expectancy of their birth cohorts. There are two different types of people described in this stage of life. The "young old" are the healthy individuals who can function on their own without assistance and can complete their daily tasks independently. The "old old" are those who depend on specific services due to declining health or diseases. This period of life is characterized as a period of "immortality vs. extinction." Immortality is the belief that your life will go on past death, some examples are an afterlife or living on through one's family. Extinction refers to feeling as if life has no purpose.
Theories of old age
Social theories, or concepts, propose explanations for the distinctive relationships between old people and their societies.
One of the theories is the Disengagement Theory proposed in 1961. This theory proposes that in old age a mutual disengagement between people and their society occurs in anticipation of death. By becoming disengaged from work and family responsibilities, according to this concept, people are enabled to enjoy their old age without stress. This theory has been subjected to the criticism that old age disengagement is neither natural, inevitable, nor beneficial. Furthermore, disengaging from social ties in old age is not across the board: unsatisfactory ties are dropped and satisfying ones kept.
In opposition to the Disengagement Theory the Activity Theory of old age argues that disengagement in old age occurs not by desire, but by the barriers to social engagement imposed by society. This theory has been faulted for not factoring in psychological changes that occur in old age as shown by reduced activity even when available. It has also been found that happiness in old age is not proportional to activity.
According to the Continuity Theory, in spite of the inevitable differences imposed by their old age, most people try to maintain continuity in personhood, activities, and relationships with their younger days.
Socioemotional Selectivity Theory also depicts how people maintain continuity in old age. The focus of this theory is continuity sustained by social networks, albeit networks narrowed by choice and by circumstances. The choice is for more harmonious relationships. The circumstances are loss of relationships by death and distance.
Life expectancy by nation at birth in year 2011 ranged from 48 years to 82.
In most parts of the world women live, on average, longer than men; even so, the disparities vary between 12 years in Russia to no difference or higher life expectancy for men in countries such as Zimbabwe and Uganda.
The number of elderly persons worldwide began to surge in the second half of the 20th century. Up to that time (and still true in underdeveloped countries), five or less percent of the population was over 65. Few lived longer than their 70s and people who attained advanced age (i.e. their 80s) were rare enough to be a novelty and were revered as wise sages. The worldwide over 65 population in 1960 was one-third of the under 5 population. By 2013, the over 65 population had grown to equal the under 5 population. The over 65 population is projected to double the under five by 2050.
Before the surge in the over 65 population, accidents and disease claimed many people before they could attain old age, and health problems in those over 65 meant a quick death in most cases. If a person lived to an advanced age, it was due to genetic factors and/or a relatively easy lifestyle, since diseases of old age could not be treated before the 20th century.
Old age benefits
In 2003, the age at which a United States citizen became eligible for full Social Security benefits began to increase gradually, and will continue to do so until it reaches 67 in 2027. Full retirement age for Social Security benefits for people retiring in 2012 is age 66. In the United Kingdom, the state pension age for men and women will rise to 66 in 2020 with further increases scheduled after that.”
Originally, the purpose of old age pensions was to prevent elderly persons from being reduced to beggary, which is still common in some underdeveloped countries, but growing life expectancies and older populations have brought into question the model under which pension systems were designed. The dominant perception of the American old age population changed from “needy” and “worthy” to “powerful” and “greedy,” old people getting more than their share of the nation's resources. However, in 2011, using a Supplemental Poverty Measure (SPM), the old age American poverty rate was measured as 15.9%.
Assistance: devices and personal
In 2008, 11 million people aged 65+ lived alone: 5 million or 22% of ages 65–74, 4 million or 34% of ages 75–84, and 2 million or 41% of ages 85+. The 2007 gender breakdown for all people 65+ was men 19% and women 39%.
Many new assistive devices made especially for the home have enabled more old people to care for themselves activities of daily living (ADL). Able Data lists 40,000 assistive technology products in 20 categories. Some examples of devices are a medical alert and safety system, shower seat (making it so the person does not get tired in the shower and fall), a bed cane (offering support to those with unsteadiness getting in and out of bed) and an ADL cuff (used with eating utensils for people with paralysis or hand weakness).
A Swedish study found that at age 76, 46% of the subjects used assistive devices. When they reached age 86, 69% used them. The subjects were ambivalent regarding the use of the assistive devices: as “enablers” or as “disablers.” People who view assistive devices as enabling greater independence accept and use them. Those who see them as symbols of disability reject them.
Even with assistive devices as of 2006, 8½ million Americans needed personal assistance because of impaired basic activities of daily living (ADLs) required for personal care or impaired instrumental activities of daily living ( IADLs) required for independent living. Projections place this number at 21 million by 2030 when 40% of Americans over 70 will need assistance. There are many options for such long term care to those who require it. There is the home care in which a family member, volunteer, or trained professional will aid the person in need and help with daily activities. Another option is community services which can provide the person with transportation, meal plans, or activities in senior centers. A third option is assisted living where 24 hour round the clock supervision is given with aid in eating, bathing, dressing, etc. A final option is a nursing home which provides professional nursing care. old age is one of the four sights in buddhism.
- Aging in dogs
- Aging in place
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- Geriatric care management
- List of the verified oldest men
- List of the verified oldest women
- Oldest people
- Respect for the Aged Day
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- Susan Jacoby, Never Say Die (Vintage, 2011) 12.
- “Alzheimer's disease” by Mayo Clinic Staff. Online at http://www.mayoclinic.com/health/alzheimers-disease/DS00161. Accessed November 14, 2013.
- George P. Moschis, Marketing to Older Consumers (Praeger, 1992), 102.
- Martin S. Lindauer, Aging, Creativity, and Art (Springer, 2003), 55-56.
- Richard A. Posner, Aging and Old Age (University of Chicago, 1995), 116.
- Tor Inge Romoren, Last Years of Long Lives: The Larvik Study (Routledge, 2003), 170.
- Patricia M. Burbank, editor, Vulnerable Older Adults: Health Care Needs and Interventions (Springer, 2006), xxi, 4, 6.
- Stressor: Any deleterious force brought to bear on a bodily system that impairs its function. http://medical-dictionary.thefreedictionary.com/stressors
- Dysregulation: impairment of a physiological regulatory mechanism (as that governing metabolism, immune response, or organ function). http://www.merriam-webster.com/medical/dysregulation.
- Patricia M. Burbank, ed., Vulnerable Older Adults: Health Care Needs and Interventions (Springer, 2006), 20.
- R. Collard and others, “Prevalence of Frailty in Community-dwelling Older Persons: a Systematic Review.” Journal of the American Geriatrics Society, 60:8, 2012. http://www.ncbi.nlm.nih.gov/pubmed/22881367.
- Muriel R. Gillick M.D., Choosing Medical Care in Old Age: What Kind, How Much, When to Stop (Harvard, 1998), 106.
- Laurie Barclay, “Prevalence of Frailty Increases Throughout Adulthood.” http://www.medscape.com/viewarticle/741960. Accessed January 14, 2014.
- Jerson Laks, ed., “Patterns of Frailty in Older Adults: Comparing Results from Higher and Lower Income Countries Using the Survey of Health, Ageing and Retirement in Europe (SHARE) and the Study on Global AGEing and Adult Health (SAGE),” published online 2013 October 29. http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0075847.
- Colleen Johnson and Barbara M. Barer, Life Beyond 85 Years (Prometheus, 2003), 3.
- Nortin M. Hadler, Rethinking Aging: Growing Old and Living Well in an Overtreated Society (University of North Carolina, 2011), 159-160. http://www.amazon.com/Nortin-M.-Hadler/e/B001ITYO36.
- Muriel R. Gillick, Lifelines: Living Longer, Growing Frail, Taking Heart (Norton, 2001), x, xv-xvi, 5-6.
- “diseases in addition to the primary disease”
- Patricia M. Burbank, ed., Vulnerable Older Adults: Health Care Needs and Interventions (Springer, 2006), 25-26.
- Colleen Johnson and Barbara M. Barer, Life Beyond 85 Years (Prometheus, 2003), 5-6.
- Patricia M. Burbank, editor, Vulnerable Older Adults: Health Care Needs and Interventions (Springer, 2006), 9.
- Barbara Logue, Last Rights: Death Control and the Elderly in America (Lexington Books/Macmillan, 1993), 17-18, 92.
- Penelope Wang, “Cutting the high cost of end-of-life care” (CNNMoney, 2012). http://money.cnn.com/2012/12/11/pf/end-of-life-care-duplicate-2.moneymag/. Accessed January 11, 2014. Also The Dartmouth Atlas Project, “Trends and Variation in End-of-Life Care for Medicare Beneficiaries with Severe Chronic Illness” (The Dartmouth Institute for Health Policy and Clinical Practice Center for Health Policy Research, 2011). Online at http://www.dartmouthatlas.org/downloads/reports/EOL_Trend_Report_0411.pdf .
- Penelope Wang, “Cutting the high cost of end-of-life care” (CNNMoney, 2012).
- Nortin M. Hadler, Rethinking Aging: Growing Old and Living Well in an Overtreated Society (University of North Carolina, 2011) 1, 3.
- Muriel R. Gillick M.D., Choosing Medical Care in Old Age: What Kind, How Much, When to Stop (Harvard, 1998), 116, 189,
- Patricia M. Burbank, ed., Vulnerable Older Adults: Health Care Needs and Interventions (Springer, 2006), 3, 19.
- Victor G. Cicirelli, Older Adults' Views on Death (Springer, 2002), 6-7, 9, 12, 32.
- Johns Hopkins Medicine, “Multimorbidity,” http://www.hopkinsmedicine.org/geriatric_medicine_gerontology/aging_research/health_services_research/multimorbidity.html. Accessed January 24, 2014.
- Barbara Logue, Last Rights: Death Control and the Elderly in America (Lexington Books/Macmillan, 1993), 18, 72.
- Colleen Johnson and Barbara M. Barer, Life Beyond 85 Years (Prometheus, 2003), 202-207.
- Victor G. Cicirelli, Older Adults' Views on Death (Springer, 2002) 55, 270, 276.
- "Table 26: Life expectancy at birth, at 65 years of age, and at 75 years of age by race and sex: United States, selected years, 1900 - 2005". Centers for Disease Control and Prevention. Retrieved 26 August 2010.
- Meyer, Julie (2001). "Census 2000 Brief, C2KBR/01-12, U.S.". "Washington, DC": "Census Bureau". Retrieved 2009-03-17.
- ”Number of old Americans” at http://www.agingstats.gov/Main_Site/Data/2012_Documents/Population.aspx. Accessed December 1, 2013.
- Pew Research Center’s Religion & Public Life Project, “Living to 120 and Beyond: Americans’ Views on Aging, Medical Advances and Radical Life Extension” (August 6, 2013). Online at http://www.pewforum.org/2013/08/06/living-to-120-and-beyond-americans-views-on-aging-medical-advances-and-radical-life-extension/
- United Nations, “World Population Ageing: 1950-2050" at http://www.un.org/esa/population/publications/worldageing19502050/
- John Bond and others, editors, Ageing in Society (Sage, 2007 3rd ed), 1.
- http://www.ssa.gov/policy/docs/ssb/v66n1/v66n1p1.html. Accessed November, 2013.
- Aubrey D.N.J, de Grey (2007). "Life Span Extension Research and Public Debate: Societal Considerations" (PDF). Studies in Ethics, Law, and Technology 1 (1, Article 5). doi:10.2202/1941-6008.1011. Retrieved August 7, 2011.
- Erikson, E.H. (1968). Identity: Youth and Crisis. New York: Norton.
- Erikson, E.H. (1963). Childhood and Society. (2nd ed.). New York: Norton.
- Carver, C.S. & Scheir, M.F. (2000). Perspectives on Personality. Needham Heights, MA: Allyn & Bacon
- Yolanda Griffiths and Andrea Thinnes, “Psychological Aspects of Aging” at http://ot.creighton.edu/community/OT_FOR_ELDERS/3rd_Edition_Chapters/Proofs/Padilla_Chapter_04_main.pdf.
- Barbara M. Newman, Philip R. Newman, Development Through Life: A Psychosocial Approach: A Psychosocial Approach (Cengage Learning, 2011), Ch 13 “Later Adulthood (60-75 Years)” and Ch 14, “Elderhood (75 until death).”
- “Theory: A conception . . . of something to be done, or of the method of doing it.” Oxford English Dictionary Online . December 2013.
- Michael Totten, “An Overview of Cumming and Henrys Social Disengagement Theory,” http://www.sciences360.com/index.php/an-overview-of-cumming-and-henrys-social-disengagement-theory-3750/.
- Laura E. Berk, Development Through the Lifespan, (Allyn & Bacon, 2010), 613.
- Laura E. Berk, Development Through the Lifespan, (Allyn & Bacon, 2010), 614.
- Laura E. Berk, Development Through the Lifespan, (Allyn & Bacon, 2010), 614-615.
- http://wdi.worldbank.org/table/2.21. “Life expectancy at birth indicates the number of years a newborn infant would live if prevailing patterns of mortality at the time of its birth were to stay the same throughout its life.”
- de Blij, Harm. The power of place. Geography, Destiny, and Globalization's Rough Landscape. Oxford University Press. London:2009. p161ff
- National Institute on Aging, National Institutes of Health, NIH Publication no. 11-7737, October 2011, “Global Health and Aging.” Online at http://www.who.int/ageing/publications/global_health.pdf.
- ”Deaths by cause, sex and mortality stratum in WHO regions” online at http://www.who.int/whr/2004/annex/topic/en/annex_2_en.pdf.
- For USA, “Old age benefits,” http://legal-dictionary.thefreedictionary.com/Old-Age+Benefits (Accessed December 28, 2013) and for UK, http://www.thisismoney.co.uk/money/pensions/article-1679780/New-state-pension-age-retire.html (Accessed December 28, 2013).
- http://www.thisismoney.co.uk/money/pensions/article-1679780/New-state-pension-age-retire.html (Accessed December 28, 2013).
- James H. Schulz and Robert H. Binstock, Aging Nation: The Economics and Politics of Growing Older in America (Johns Hopkins, 2008). 3-4.
- Laura Katz Olson, The Not-so-golden Years: Caregiving, the Frail Elderly, and the Long-term Care Establishment (Rowman and Littlefield, 2003), 4.
- U.S. Department of Health and Human Services: Administration on Aging, “A Profile of Older Americans: 2011," 1. Online at http://www.aoa.gov/Aging_Statistics/Profile/2011/docs/2011profile.pdf.
- Stanford Center on Longevity, “New Realities of an Older America: Challenges, Changes and Questions” online at http://longevity3.stanford.edu/wp-content/uploads/2013/01/New-Realities-of-an-Older-America.pdf.
- Maintained for the National Institute on Disability and Rehabilitation Research of the U.S. Dept. of Education.
- http://www.abledata.com/abledata.cfm?pageid=19327&ksectionid=19327. Accessed January 1, 2014.
- U.S. Department of Health and Human Services, “Assistive Device Use among the Elderly” online at http://aspe.hhs.gov/daltcp/reports/astdev.pdf and Elderly Health Service, Department of Health, Hong Kong, “Assistive Devices for Activities of Daily Living” online at http://www.info.gov.hk/elderly/english/healthinfo/elderly/assistivedevices-e.htm. Accessed November 30, 2013.
- Greta Häggblom-Kronlöf and Ulla Sonn, “Use of Assistive Devices – a Reality Full of Contradictions in Elderly Persons' Everyday Life,” Disability and Rehabilitation: Assistive Technology, 2007, Vol. 2, No. 6 , Pages 335-345. http://informahealthcare.com/doi/abs/10.1080/17483100701701672. Accessed January 8, 2014.
- Laura N. Gitlin, “Why Older People Accept or Reject Assistive Technology,” Generations, Vol. XIX, No. 1, Spring 1995. Online at http://www.homemods.org/resources/pages/accept.shtml.
- Patricia M. Burbank, editor, Vulnerable Older Adults: Health Care Needs and Interventions (Springer, 2006), 17.
- Congressional Budget Office, “Rising Demand for Long-Term Services and Supports for Elderly People” (June 2013) online at http://www.cbo.gov/sites/default/files/cbofiles/attachments/44363-LTC.pdf.
|Wikiquote has a collection of quotations related to: Age|
|Look up old age, eld, or elderly in Wiktionary, the free dictionary.|
|Wikimedia Commons has media related to Old people.|
- Milton Crum, “I’m Old” at http://montanaseniornews.com/news/2013/jun/06/im-old/ and http://thecsr.org/resource-directory/im-old-an-essay-on-aging-by-milton-crum/#sthash.e87C5Jyc.dpuf.
- Laura Carstensen - research at Stanford university's Life-span Development Laboratory, and Stanford Center on Longevity.
- Milton Crum, “I’m Frail” at Association of Hospice & Palliative Care Chaplains, http://www.ahpcc.org.uk/imfrail.pdf
- International Federation on Aging—informs and promotes positive change for old people globally
- Age UK—UK charity supporting those in old age in the UK and in developing countries
- HelpAge International—UK-based international charity supporting older people in developing countries. Sister organisation of Age UK (above)
- People 'get happier as they age'
- How Old Do You Feel? It Depends on Your Age
|Stages of human development