منابع مشابه
Evaluating diagnostic tests
Anaesthesiologists are increasingly more involved in perioperative patient care wherein interpretation of special investigations is crucial to making therapeutic and prognostic decisions. Furthermore, anaesthetic journal publications increasingly rely on diagnostic tests, without paying sufficient attention to the methodology for evaluation of the predictive ability of these tests, particularly...
متن کاملLaboratory tests for malaria: a diagnostic conundrum.
OBJECTIVES To detect malarial parasites using the peripheral blood smear (PBS) and to compare the PBS with the immunochromatographic antigen test (i.e. OptiMAL and polymerase chain reaction (PCR)). METHODS Six ml of blood was collected from each of 170 patients clinically suspected of having malaria. These samples were used to perform PBS examination, the OptiMAL test and PCR by standard prot...
متن کاملGuidelines for meta-analyses evaluating diagnostic tests.
OBJECTIVES To introduce guidelines for the conduct, reporting, and critical appraisal of meta-analyses evaluating diagnostic tests and to apply these guidelines to recently published meta-analyses of diagnostic tests. DATA SOURCES Based on current concepts of how to assess diagnostic tests and conduct meta-analyses. They are applied to all meta-analyses evaluating diagnostic tests published i...
متن کاملNonparametric Methods for Evaluating Diagnostic Tests
We consider the performance of a diagnostic test based on continuous measurements in its ability to distinguish between healthy and diseased individuals. For a performance criterion we use Youden's (1950) index which is essentially the sum of the sensitivity and speci city. Based on available training set data, two types of nonparametric estimators for the optimal cuto level and for the index a...
متن کاملInterference in laboratory tests
Interference in clinical laboratory testing can create discrepancies in test results which can lead to patient harm. In clinical chemistry, interference is defined as a cause of medically significant difference in the measurand test result due to another component or property of the sample. Interference by endogenous and exogenous substances with assays for clinical analytes is a common prob...
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ژورنال
عنوان ژورنال: BMJ
سال: 2008
ISSN: 0959-8138,1756-1833
DOI: 10.1136/bmj.39513.576701.80