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That is a total of (1500 + 275) = 1775 person-years of life. Now take the 50 new cases of HIV, and divide by 1775 to get 0.028, or 28 cases of HIV per 1000 population, per year. In other words, if you were to follow 1000 people for one year, you would see 28 new cases of HIV. This is a much more accurate measure of risk than prevalence.
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 United States was around 290,810,000 in 2003, and in that year, approximately 2,419,900 deaths occurred in total, giving a ...
per vaginam: vaginally q quaque: every, per q.1 h, q.1° quaque 1 hora: every 1 hour (can replace 1 with other numbers) q4PM at 4:00 pm (can replace 4 with other numbers) mistaken to mean every 4 hours q.a.d. quaque alternis die: every other day q.a.m. quaque die ante meridiem: every morning (every day before noon) q.d./q.1.d. quaque die: every day
This is in contrast to period prevalence which is a measure of the proportion of people in a population who have a disease or condition over a specific period of time, say a season, or a year. Point prevalence can be described by the formula: Prevalence = Number of existing cases on a specific date ÷ Number of people in the population on this ...
For example, the incidence of breast cancer in a woman in the United Kingdom at age 55 to 59 is estimated at 280 cases per 100.000 per year, [6] and the risk factor of having been exposed to high-dose ionizing radiation to the chest (for example, as treatments for other cancers) confers a relative risk of breast cancer between 2.1 and 4.0, [7 ...
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. [2] A CFR, in contrast, is the number of deaths among the number of diagnosed cases only, regardless of time or total population.
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For the more general case of a life time health profile (i.e., experiencing more than one health state during the remaining years of life), the utility of a life time health profile must equal the sum of single-period utilities. [19] Because of these theoretical assumptions, the meaning and usefulness of the QALY is debated.