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22 Cards in this Set
- Front
- Back
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Type II Error
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Accepting the null hypothesis when the null hypothesis is not true.
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Type I Error
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Rejecting the null hypothesis when the null hypothesis is true.
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Odds Ratio
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Comparison of the odds of getting a disease in an exposed group to the odds of getting a disease in an unexposed group.
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Attributable Risk
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Difference in risk between an exposed group and an unexposed group.
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Relative Risk
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Comparison of disease prevalence betweeen exposed and unexposed worker populations.
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Prevelance Rate
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Total number of cases in a worker population at a specific time.
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Incidence Rate
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Number of new cases of a disease per worker per unit time.
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Attributable Risk?
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Prevelance of the disease in the exposed work population minus the prevelance rate of the unexposed.
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Case Report Study?
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Present clinical information on a case.
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Case-Control Study (retrospective)?
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Identify a group of workers with a disease and examine their work history for potential exposures.
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Cohort Study (prospective)?
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Identify a group of workers by exposureand follow them over time for development of a disease.
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Cohort Study (retrospective)?
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Go back in time and identify a group of workers by exposure and follow them to present for development of disease.
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Cross-sectional Study?
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Select a group of workers irrespective of exposureor diseaseand measure both over time.
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Mortality Study?
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Standard mortality rate. Compare rate of unknown to that of a known.
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Selection Bias?
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Different criteria used for cases and controls. Healthy Worker Effect.
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Observational Bias?
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Information on disease outcome obtained in noncomparable manner between exposed and unexposed.
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Confounding Bias?
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Failure to take into account other variables which are associated with the disease and exposure. i.e. smoking.
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Chi-Square Test
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Used to analyze statistical data from categorical information.
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F-Test
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Used to test the accuracy of a statistical model.
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T-test
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Used when comparing two statistical distributions from small samples (n<30)
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Z-test
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Used for large samples (n>30)
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Normal Distributions
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68% data is within 1 SD.
95% data is within 2 SD. 99% data is within 3 SD. |
