The evaluation of diagnostic tests: evidence on technical and diagnostic accuracy, impact on patient outcome and cost-effectiveness is needed.
OBJECTIVE: Before introducing a test in clinical practice, its characteristics and added value should be assessed. Diagnostic accuracy studies only are not sufficient; the test's impact on patient outcome ought to be assessed as well. To do this, we propose a stepwise evaluation of diagnostic tests. STUDY DESIGN AND SETTING: Theoretical-conceptual approach. RESULTS: First, the test's technical accuracy refers to the ability to produce usable information under standardized conditions. In a sec...Expand abstract
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