ebm.med.ualberta.ca

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Definitions (41)

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a


B
Source: ebm.med.ualberta.ca

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absolute risk difference


The difference in the risk for disease or death between an exposed population and an unexposed population. (Harm/Etiology
Source: ebm.med.ualberta.ca

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(arr)


the difference in the absolute risk (rates of adverse events) between study and control populations. (Therapy
Source: ebm.med.ualberta.ca

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association


Statistical dependence between two or more events, characteristics, or other variables. An association may be fortuitous or may be produced by various other circumstances; the presence of an association does not necessarily imply a causal relationship. (Harm/Etiology)
Source: ebm.med.ualberta.ca

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bias


Deviation of results or inferences from the truth, or processes leading to such deviation.
Source: ebm.med.ualberta.ca

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blind assessment


The evaluation of an outcome is made without the evaluator  knowing which results are from the test under study and which are from the control or “gold standard”. (Diagnosis
Source: ebm.med.ualberta.ca

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double-blind study


If the statistical analysis is also done in ignorance of the group to which subjects belong, the study is sometimes described as triple blind
Source: ebm.med.ualberta.ca

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case-series


Report of a number of cases of disease. (Harm/Etiology
Source: ebm.med.ualberta.ca

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causality


The relating of causes to the effects they produce. Most of epidemiology concerns causality and several types of causes can be distinguished. It must be emphasized, however, that epidemiological evidence by itself is insufficient to establish causality, although it can provide powerful circumstantial evidence. (Harm/Etiology)
Source: ebm.med.ualberta.ca

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,


cohorts are identified at a point of time in the past and information is collected on their subsequent outcomes. (Diagnosis, Harm/Etiology, Prognosis, Therapy
Source: ebm.med.ualberta.ca


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