c epi 2a.txt

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1. Enumeration and Tabulation
Listing all the data and creating a frequency table.
2. Histogram
A bar chart used for continuous variables.
3. Line Graph
Used to display trends.
4. Pie Chart
A circle that shows the proportion of cases according to several categories.
5. Percentage
A proportion multiplied by 100.
6. Proportion
A type of ratio in which the numberator is part of the denominator.
7. Ratio
The value obtained by dividing one quanitity by another.
8. Rate
Also a type of ratio, denominator involves a measure of time.
9. Count
Total number of cases of a disease or other health phenomenon being studied.
10. Period Prevalence
All cases of a disease within a period of time. When expressed as a proportion, refers to the number of cases of illness during a time period divided by the average size of the population.
11. Point Prevalence
Number of caes of illness in a group or population at a point in time divided by the total number of persons in that group or population.
12. Prevalence
Number of existing cases of a disease or health condition in a population at some designated time.
13. Incidence
the occurrence of new disease or mortality within a defined period of observation in a specified population.
14. Incidence Rate
Number of new cases of a disease, or other condition, in a population divided by the total number of population at risk over a time period, times a multiplier.
15. Population at Risk
Those members of the population who are capable of developing a disease or condition.
16. Reference Population
Group from which cases of a disease have been taken; also refers to the group to which the results of a study may be generalized.
17. Case Fatality Rate
Number of deats caused by a disease among those wh ohave the disease during a time period.
18. Crude Rate
A summary rate based on the actual number of events in a population over given time period.
19. Death rate
Approximates the proportion of a dpopulation that dies during a time period of interest.
20. Specific rate
Statistic referring to a particular subgroup of the population defined in terms of age, race, or sex; also may refere to the entire population but is specific to some single cause of death or illness.