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Epidemiology and Biostatistics 6300 questions and answers graded A+ 2024/2025
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Epidemiology and Biostatistics 6300 questions and answers graded A+ 2024/2025
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Voorbeeld van de inhoud
Epidemiology and Biostatistics 6300Absolute differences in risk
Risk (manipulate)- Risk (remedy)
Adjusted Rates
fictitious rates which might be built to evaluate companies that vary through some essential
issue. (additionally called standardized charges) Direct adjustment makes use of widespread
population age distribution. Indirect adjustment makes use of standard populace age-particular
mortality prices.
- a summarizing procedure
-results of differences in the composition of populations being in comparison have been
minimized statistically.
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Brainpower
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Agent
The cause of the disease (i.E. Infectious marketers, chemical dealers, bodily retailers).
Alternative speculation
The hypothesis that a actual (true) distinction exists among means or proportions of businesses
being in comparison, or that there is a real affiliation among two variables.
,Analytic epidemiology
Analytic- have a look at herbal records and etiology; discover reasons for differences in
corporations; compare interventions, remedies, modes of healthcare delivery (how, why?)
ANOVA
(Analysis of Variance)- Method of importance trying out based at the ratio of among-groups
variance to inside-businesses variance. This method is utilized in statistical evaluation if the
established variable is non-stop and the unbiased variable or variables are all specific.
Association
Attack Rate
Proportion of exposed men and women who turn out to be unwell; the normal measure used to
establish severity of disorder outbreak.
Attributable Risk
Of the whole danger for a specific final results, AR is the share attributable to a particular
publicity. (see hazard distinction)
Bias
Introduction of error that produces deviations or distortions of facts that are predominantly in a
single route, rather than random errors.
Bivariable
two variable
Bivariate
involving or relying upon two variables
, Blinding (covering)
Reduces differential misclassification and avoids overestimation of therapeutic advantage
Case fatality fee
Proportion of clinically sick people who die of the circumstance under the have a look at; a
marker of virulence.
Case-control observe
Study corporations are defined on the basis of sickness (or outcome) status. The frequency of
the hazard factor (publicity) in the instances (diseased men and women) is compared with the
frequency of the danger element (publicity) in the controls (nondiseased men and women).
Chi-squared test
Statistical importance take a look at used to research nominal or dichotomous statistics in a
contingency desk. The first step is to decide that chi-square price for each cell inside the table,
by way of calculating the rectangular of the determined count (0) minus the anticipated matter
(E) in a cell and dividing the result by the predicted remember for that cellular. The subsequent
step is to feature the values for all cells within the table. The fashionable chi-rectangular formula
is E[(O-E)2/E]
used for categories NOT non-stop information (no suggest or SD)
Clinical trial
Cohort examine
Study in which a without a doubt recognized organization is characterised by means of publicity
and is observed for the final results.
Confounding variable
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