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Articles by Ana-Maria Simundic
Showing articles by "Ana-Maria Simundic"
Article
May 2016
Statistical analysis in method comparison studies part one
This first of two articles on method comparison studies gives some key concepts related to the design of the method comparison study, data analysis and graphical presentation, stressing the importance of a well-designed and carefully planned experiment using adequate statistical procedures for data analysis when...
Quality assurance
Article
July 2012
Preanalytical errors in Point-Of-Care Testing
Preanalytical errors are quite frequent in the area of point-of-care testing (POCT). There are many reasons for that. First of all, POCT testing is usually performed by clinical staff (i.e. nurses and physicians), who are neither so skilled nor educated for laboratory work as laboratory professionals.
Moreover,...
Point-of-care testing
Quality assurance
Preanalytical phase
Article
October 2009
Diagnostic accuracy – Part 2
Predictive value and likelihood ratio
Sensitivity and specificity define the discriminative power of a diagnostic procedure, whereas predictive values relate to the predictive ability of a test to identify disease or its absence in individuals.
Predictive values are greatly influenced by the prevalence of the disease and should not be generalized beyond ...
Information management
Article
June 2009
Diagnostic accuracy – Part 1
Basic concepts: sensitivity and specificity, ROC analysis, STARD statement
The discriminative ability of a diagnostic procedure is called diagnostic accuracy, and a number of quantitative measures out of which sensitivity and specificity are mostly used in the biomedical literature can express it.
Each diagnostic-accuracy measure relates to some specific aspects of a diagnostic procedure....
Information management