Definitions Flashcards
Proportion
Division of 2 related numbers (numerator is subset of denominator)
Ratio
Division of 2 unrelated numbers (numerator is not part of denominator)
Rate
Division of 2 numbers with TIME incorporated into the denominator
Outbreak
Epidemic limited to a localized increase in occurrence of disease
Cluster
Similar to outbreak in smaller number/area
Endemic
Constant presence of a disease within a given area or population in excess of normal levels in other areas
Epidemic
Community/period clearly defined where occurrence of disease is clearly above normal expectancy
Pandemic
Epidemic that spans across the globe
Populaton
Group of interest
Case
Most critical element that must be defined before and of the W’s of descriptive epidemiology can be accomplished
Frequency
Number of disease occurrences, counts in relation to size of the population
Morbidity
Number of persons with disease
Mortality
Number of deaths (all causes or cause-specific)
Fecundity
Capacity for producing offspring, especially in abundance
Natality
Ratio ofn umber of births to the size of the population (birth rate)