Tag Prevalence

Enrichment ratio Enrichment ratio

The art of resignation

The procedure for choosing the cut-off point for a diagnostic test is reviewed. To decide this threshold, which is influenced by the characteristics of the model and the clinical scenario in which it will be applied, we will take into account the sensitivity and precision of the test for each possible cut-off point. The precision enrichment ratio will be useful in cases with a large imbalance between the two diagnostic categories.
Enrichment ratio Enrichment ratio

From bridge to bridge

The concepts of odds and probability are described, as well as their combined use together with the Bayes’ factor for calculating the probability of being sick or healthy after knowing the result of a diagnostic test.
contingency tables

The table

Contingency tables. Contingency tables are described for the most common studies: cross-sectional, case-control, and cohort studies.

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