Search results
Results from the WOW.Com Content Network
Crude death rate, globally. The crude death rate is defined as "the mortality rate from all causes of death for a population," calculated as the "total number of deaths during a given time interval" divided by the "mid-interval population", per 1,000 or 100,000; for instance, the population of the U.S. was around 290,810,000 in 2003, and in that year, approximately 2,419,900 deaths occurred in ...
Case fatality rate. In epidemiology, case fatality rate ( CFR) – or sometimes more accurately case-fatality risk – is the proportion of people who have been diagnosed with a certain disease and 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.
Examples. The most common are birth, death and unemployment rates. For example, in a community made up of primarily young couples, the birthrate might appear to be high when compared to that of other populations.
[clarification needed] The birth rate (along with mortality and migration rates) is used to calculate population growth. The estimated average population may be taken as the mid-year population. When the crude death rate is subtracted from the crude birth rate (CBR), the result is the rate of natural increase (RNI).
The Gompertz–Makeham law of mortality describes the age dynamics of human mortality rather accurately in the age window from about 30 to 80 years of age. At more advanced ages, some studies have found that death rates increase more slowly – a phenomenon known as the late-life mortality deceleration [2] – but more recent studies disagree.
Rates are the average annual number of births or deaths during a year per 1,000 persons; these are also known as crude birth or death rates. Column four is from the UN Population Division and shows a projection for the average natural increase rate for the time period shown using the medium fertility variant. Blank cells in column four indicate ...
Under de Moivre's law, the probability that (x) fails to survive to age x+t is. The force of mortality ( hazard rate or failure rate) is where f (x) is the probability density function. Under de Moivre's law, the force of mortality for a life aged x is. which has the property of an increasing failure rate with respect to age.
Standardized mortality ratio. The standardized mortality ratio is the ratio of observed deaths in the study group to expected deaths in the general population. [2] This ratio can be expressed as a percentage simply by multiplying by 100. [citation needed] The SMR may be quoted as either a ratio or a percentage.