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22 Cards in this Set

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