Biostatistics

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A variable type consisting of 2 categories, may signify order such as "low" or "high"
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Terms in this set (14)
A variable type consisting of 2 categories, may signify order such as "low" or "high"
Dichotomous
A variable type consisting of 2 or more categories, not signifying order
Nominal
A variable type with categories ordered in a meaningful sequence
Ordinal
A variable type which can assume one of a large or infinite number of values
Continuous
Range associated with a measure of proportion:
0 - 1.0
Range associated with a measure of percentage:
0 - -100
Formula for proportion:
A/A+B where B = all remaining
Calculate the proportion for a group of 165 individuals, 25 o whom are diabetic:
Calculate as a percentage:
0.152
15.2%
A measure that quantifies the "burden" of disease at a set point in time:
prevalence
A measurement of occurrence of disease over a specified period of time:
Incidence
A measurement calculated by the number of new cases during a period divided by the number of subjects at risk in the population at the beginning of the study:Cumulative incidenceA measurement that compares the incidence of disease (risk) among the exposed with the incidence of disease (risk) among the non-exposed ("reference") by means of ratio:Relative riskWhen considering relative risk, the reference (non-exposed) group assumes a value of _______ :1.0 (the "null" value)This measurement can be thought of as a ratio of 2 proportions (think of these as fractions of fractions):Risk ratio e.g. (10/840)/(16/2,240) exposed vs. non-exposed