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TDR Formation Evaluation of diagnostic tests

How do you evaluate diagnostic tests?
Assessing Diagnostic Tests.
Assessment of a diagnostic test involves consideration of 3 components of effectiveness: accuracy, clinical utility, and patient benefit.
To be effective, a test must be accurate, which is determined by sensitivity (the true-positive rate) and specificity (the true-negative rate).
What is the study design for the evaluation of diagnostic tests?
The most valid study design for assessing the accuracy of diagnostic tests is a non- experimental cross-sectional study that compares a test's classification of a diagnosis with a reference standard's classification, in a relevant study population.
What is the diagnostic efficacy of a test?
Diagnostic efficacy of a test is measured by its ability to change the probability of disease (pre- versus post-test likelihood).
Management efficacy is a measure of how the test changes patient management.
Outcome efficacy, which may take years to evaluate, is the ultimate yardstick of usefulness.
A diagnostic test is a test designed to locate specific learning deficiencies in the case of specific individuals at a specific stage of learning so that specific efforts could be made to overcome those deficiencies through remedial instruction.

How do you evaluate diagnostic tests?