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Mortality And Morbidity
Mortality is the state of being mortal, or susceptible to death; the opposite of immortality. Mortality may also refer to: * Fish mortality, a parameter used in fisheries population dynamics to account for the loss of fish in a fish stock through death * ''Mortality'' (book), a 2012 collection of essays by Anglo-American writer Christopher Hitchens * Mortality (computability theory), a property of a Turing machine if it halts when run on any starting configuration * Mortality rate, a measure for the rate at which deaths occur in a given population * Mortality/differential attrition, an error in the internal validity of a scientific study See also * Case fatality rate, the proportion of deaths within a designated population of people with a medical condition * Cause of death * Fulminant * Mortality displacement, a (forward) temporal shift in the rate of mortality * Mortality rate or death rate * Mortality salience Mortality salience is the awareness by individuals that their de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Death
Death is the irreversible cessation of all biological functions that sustain an organism. For organisms with a brain, death can also be defined as the irreversible cessation of functioning of the whole brain, including brainstem, and brain death is sometimes used as a legal definition of death. The remains of a former organism normally begin to decompose shortly after death. Death is an inevitable process that eventually occurs in almost all organisms. Death is generally applied to whole organisms; the similar process seen in individual components of an organism, such as cells or tissues, is necrosis. Something that is not considered an organism, such as a virus, can be physically destroyed but is not said to die. As of the early 21st century, over 150,000 humans die each day, with ageing being by far the most common cause of death. Many cultures and religions have the idea of an afterlife, and also may hold the idea of judgement of good and bad deeds in one's life ( h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Immortality
Immortality is the concept of eternal life. Some modern species may possess biological immortality. Some scientists, futurists, and philosophers have theorized about the immortality of the human body, with some suggesting that human immortality may be achievable in the first few decades of the 21st century with the help of certain technologies such as mind uploading (digital immortality). Other advocates believe that life extension is a more achievable goal in the short term, with immortality awaiting further research breakthroughs. The absence of aging would provide humans with biological immortality, but not invulnerability to death by disease or injury. Whether the process of internal immortality is delivered within the upcoming years depends chiefly on research (and in neuron research in the case of internal immortality through an immortalized cell line) in the former view and perhaps is an awaited goal in the latter case. What form an unending human life would take, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish Mortality
Fish mortality is a parameter used in fisheries population dynamics to account for the loss of fish in a fish stock through death. The mortality can be divided into two types: * Natural mortality: the removal of fish from the stock due to causes not associated with fishing. Such causes can include disease, competition, cannibalism, old age, predation, pollution or any other natural factor that causes the death of fish. In fisheries models natural mortality is denoted by (M).Sparre, P.; Ursin E.and Venema S. C. (1989). Introduction to tropical fish stock assessment. Part 1- Manual. FAO Fisheries Technical Paper No. 3061. Rome, FAO. p. 337. * Fishing mortality: the removal of fish from the stock due to fishing activities using any fishing gear. It is denoted by (F) in fisheries models. (M) and (F) are additive instantaneous rates that sum up to (Z), the instantaneous total mortality coefficient; that is, Z=M+F.Gulland, J.A. (1969). Manual of Methods for fish stock assessment. Part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mortality (book)
''Mortality'' is a 2012, posthumously published book by Anglo-American writer Christopher Hitchens. It comprises seven essays which first appeared in '' Vanity Fair'' concerning his struggle with esophageal cancer, with which he was diagnosed during his 2010 book tour and which killed him in December 2011. An eighth chapter consisting of unfinished "fragmentary jottings", a foreword by Graydon Carter (Hitchens' '' Vanity Fair'' editor) and an afterword by Carol Blue (Hitchens' widow), are also included in the publication. Description Hitchens held the post of contributing editor at '' Vanity Fair'' from November 1992 until his death. In this capacity he contributed about 10 essays per year on subjects as diverse as politics and the limits of self-improvement, writing about "anything except sports". Therefore, he felt obliged when he was asked to write about his illness for the magazine, and managed to dispatch seven essays from "Tumourville" before he was overcome by his illne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mortality (computability Theory)
In computability theory, the mortality problem is a decision problem which can be stated as follows: :''Given a Turing machine, decide whether it halts when run on any configuration (not necessarily a starting one)'' In the statement above, the configuration is a pair , where q is one of the machine's states (not necessarily its initial state) and w is an infinite sequence of symbols representing the initial content of the tape. Note that while we usually assume that in the starting configuration all but finitely many cells on the tape are blanks, in the mortality problem the tape can have arbitrary content, including infinitely many non-blank symbols written on it. Philip K. Hooper proved in 1966 that the mortality problem is undecidable. However, it can be shown that the set of Turing machines which are mortal (i.e. halt on every starting configuration) is recursively enumerable In computability theory, a set ''S'' of natural numbers is called computably enumerable (c.e.), re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mortality Rate
Mortality rate, or death rate, is a measure of the number of deaths (in general, or due to a specific cause) in a particular population, scaled to the size of that population, per unit of time. Mortality rate is typically expressed in units of deaths per 1,000 individuals per year; thus, a mortality rate of 9.5 (out of 1,000) in a population of 1,000 would mean 9.5 deaths per year in that entire population, or 0.95% out of the total. It is distinct from "morbidity", which is either the prevalence or incidence of a disease, and also from the incidence rate (the number of newly appearing cases of the disease per unit of time). An important specific mortality rate measure is the crude death rate, which looks at mortality from all causes in a given time interval for a given population. , for instance, the CIA estimates that the crude death rate globally will be 7.7 deaths per 1,000 people in a population per year. In a generic form, mortality rates can be seen as calculated using (d/ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internal Validity
Internal validity is the extent to which a piece of evidence supports a claim about cause and effect, within the context of a particular study. It is one of the most important properties of scientific studies and is an important concept in reasoning about evidence more generally. Internal validity is determined by how well a study can rule out alternative explanations for its findings (usually, sources of systematic error or 'bias'). It contrasts with external validity, the extent to which results can justify conclusions about other contexts (that is, the extent to which results can be generalized). Details Inferences are said to possess internal validity if a causal relationship between two variables is properly demonstrated.Shadish, W., Cook, T., and Campbell, D. (2002). Experimental and Quasi-Experimental Designs for Generilized Causal Inference Boston:Houghton Mifflin. A valid causal inference may be made when three criteria are satisfied: # the "cause" precedes the "eff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Case Fatality Rate
In epidemiology, case fatality rate (CFR) – or sometimes more accurately case-fatality risk – is the proportion of people diagnosed with a certain disease, who end up dying of it. Unlike a disease's mortality rate, the CFR does not take into account the time period between disease onset and death. A CFR is generally expressed as a percentage. It represents a measure of disease lethality and may change with different treatments. CFRs are most often used for with discrete, limited-time courses, such as acute infections. Terminology The ''mortality rate'' – often confused with the CFR – is a measure of the relative number of deaths (either in general, or due to a specific cause) within the entire population per unit of time. A CFR, in contrast, is the number of deaths among the number of diagnosed cases only, regardless of time or total population. From a mathematical point of view, by taking values between 0 and 1 or 0% and 100%, CFRs are actually a measure o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cause Of Death
In law, medicine, and statistics, cause of death is an official determination of conditions resulting in a human's death, which may be recorded on a death certificate. A cause of death is determined by a medical examiner. The cause of death is a specific disease or injury, in contrast to the manner of death which is a small number of categories like "natural", "accident", "suicide", and "homicide", which have different legal implications. International Classification of Disease (ICD) codes are often used to record manner and cause of death in a systematic way that makes it easy to compile statistics and more feasible to compare events across jurisdictions. Accuracy concerns A study published in ''Preventing Chronic Disease'' found that only one-third of New York City resident physicians reported believing that the present system of documentation was accurate. Half reported the inability to record "what they felt to be the correct cause of death", citing reasons such as technic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fulminant
Fulminant () is a medical descriptor for any event or process that occurs suddenly and escalates quickly, and is intense and severe to the point of lethality, i.e., it has an explosive character. The word comes from Latin ''fulmināre'', to strike with lightning. There are several diseases described by this adjective: * Fulminant liver failure * Fulminant (Marburg variant) multiple sclerosis. * Fulminant colitis * Fulminant pre-eclampsia * Fulminant meningitis * Purpura fulminans * Fulminant hepatic venous thrombosis ( Budd-Chiari syndrome) * Fulminant jejunoileitis * Fulminant myocarditis Beyond these particular uses, the term is used more generally as a descriptor for sudden-onset medical conditions that are immediately threatening to life or limb. Some viral hemorrhagic fevers, such as Ebola, Lassa fever, and Lábrea fever, may kill in as little as two to five days. Diseases that cause rapidly developing lung edema, such as some kinds of pneumonia, may kill in a few hour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mortality Displacement
In epidemiology, mortality displacement is the occurrence of deaths at an earlier time than they would have otherwise occurred, meaning the deaths are ''displaced'' from the future into the present. The displacement may be described as the result of events such as heat waves, cold spells, epidemics and pandemics (especially influenza pandemics), famine or war, and allows for estimates of the mortality caused by those events. The earlier deaths are called excess deaths (i.e., more deaths than expected), and this time period is followed by a period of mortality deficit (i.e., fewer deaths than expected, because those people have died at a younger age). It is also known as "harvesting". Mortality deficit in a particular time period can be caused by deaths displaced to an earlier time (due to harvesting by an event in the past) or deaths displaced to a future time (due to lives being saved, also called "avoided mortality"). Heat waves During heat waves, for instance, there are oft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mortality Salience
Mortality salience is the awareness by individuals that their death is inevitable. The term derives from terror management theory, which proposes that mortality salience causes existential anxiety that may be buffered by an individual's cultural worldview and/or a sense of self-esteem. Terror management theory Mortality salience engages the conflict that humans have to face both their instinct to avoid death completely, and their intellectual knowledge that avoiding death is ultimately futile. According to terror management theory, when human beings begin to contemplate their mortality and their vulnerability to death, feelings of terror emerge because of the simple fact that humans want to avoid their inevitable death. Mortality salience comes into effect, because humans contribute all of their actions to either avoiding death or distracting themselves from the contemplation of it. Thus, terror management theory asserts that almost all human activity is driven by the fear of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
