A scientist who has dedicated his life to studying seabirds has revealed how climate change has led to mass mortality events, altered breeding times and how the population is now being devastated by bird flu, in one of the ...
Plants & Animals
Sep 19, 2023
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1
In 1993, frogs were found dying en masse in Far North Queensland. When scientists analyzed their bodies, they found something weird. Their small bodies were covered in spores.
Plants & Animals
Aug 29, 2023
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23
The risk of fatal heat waves has risen sharply over the past 20 years. In the future, such extreme weather will become more frequent and heat-related excess mortality will increase. Europe will be particularly affected, as ...
Environment
Aug 25, 2023
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62
Climate impacts such as dry, hot summers reduce the growth and increase the mortality of trees in the Black Forest because they negatively influence the climatic water balance, i.e., the difference between precipitation and ...
Ecology
Aug 23, 2023
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3
Recent wildfires in Hawaii and in many parts of Canada underscore the importance of wildfire prevention and management. Research from North Carolina State is helping us better understand—and possibly mitigate—increased ...
Earth Sciences
Aug 15, 2023
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31
It is widely believed that China's socialist economy had relatively high rates of extreme poverty, while the capitalist reforms of the 1980s and 1990s delivered rapid progress, with extreme poverty declining from 88% in 1981 ...
Economics & Business
Jul 14, 2023
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1
A new study just released in the Journal of Risk Analysis suggests that U.K. residents may be more concerned about climate change than traffic accident mortality. The Newcastle University Business School research team found ...
Environment
Jul 14, 2023
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1
Biologists at The University of Texas at Arlington have published new findings from a study to learn how different coral species respond to a devastating disease and which species are more vulnerable.
Plants & Animals
Jul 5, 2023
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1
Metallic nanoparticles made from silver and copper can kill cancer cells with minimal or little side effects, say researchers from the Middle East. A study published in Advanced Biology showed that the metallic particles ...
Bio & Medicine
Jun 27, 2023
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14
The global burden of disease associated with water insecurity has traditionally focused on diarrheal disease as the most significant driver of infant and child mortality. However, a review in WIREs Water notes that there ...
Social Sciences
Jun 21, 2023
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1
Mortality rate is a measure of the number of deaths (in general, or due to a specific cause) in some population, scaled to the size of that population, per unit time. Mortality rate is typically expressed in units of deaths per 1000 individuals per year; thus, a mortality rate of 9.5 in a population of 100,000 would mean 950 deaths per year in that entire population. It is distinct from morbidity rate, which refers to the number of individuals in poor health during a given time period (the prevalence rate) or the number who currently have that disease (the incidence rate), scaled to the size of the population.
One distinguishes:
In regard to the success or failure of medical treatment or procedures, one would also distinguish:
Note that the crude death rate as defined above and applied to a whole population can give a misleading impression. The crude death rate depends on the age (and gender) specific mortality rates and the age (and gender) distribution of the population. The number of deaths per 1000 people can be higher for developed nations than in less-developed countries, despite life expectancy being higher in developed countries due to standards of health being better. This happens because developed countries typically have a completely different population age distribution, with a much higher proportion of older people, due to both lower recent birth rates and lower mortality rates. A more complete picture of mortality is given by a life table which shows the mortality rate separately for each age. A life table is necessary to give a good estimate of life expectancy.
This text uses material from Wikipedia, licensed under CC BY-SA
