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NURS 3316 UNIT 4

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Created by:

monkeytail  on June 7, 2011

Subjects:

epidemiology

Description:

Objectives Distinguish among rates, frequencies, proportions, and ratios; Construct crude and specific rates and differentiate these from adjusted rates; Discuss the need for and differentiate methods of standardization of rates; Differentiate between measures of frequency and measures of impact; DeObjectives

Distinguish among rates, frequencies, proportions, and ratios;

Construct crude and specific rates and differentiate these from adjusted rates;

Discuss the need for and differentiate methods of standardization of rates;

Differentiate between measures of frequency and measures of impact;

Describe the interrelationship between incidence and prevalence;

Calculate and interpret basic epidemiological measures to quantify health outcomes in the population;

Identify common indicators used to monitor the health status of the population. (see more)

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NURS 3316 UNIT 4

Ratio
It is obtained by dividing one quantity (numerator) by another (denominator) without implying any specific relationship between the numerator and the denominator.
If there are 5 apples and 10 oranges, it is expressed as follows:
5 : 10 or 5 / 10
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Ratio It is obtained by dividing one quantity (numerator) by another (denominator) without implying any specific relationship between the numerator and the denominator.
If there are 5 apples and 10 oranges, it is expressed as follows:
5 : 10 or 5 / 10
Proportion It is a type of ratio. It describes outcome as a reflection of a part to the whole. It is typically expressed as percentages. For example, if there are 225 people in a room and 89 of these are males, males is 89 / 225 = 0.396. Multiply the answer by 100 to get the percentage: 0.396 x 100 = 39.6%.
Rate It is a special kind of proportion, the frequency of a specified outcome that occurs in a population during a defined period of time, divided by the average population at risk.

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