Gray Zone Matters
View Presentation *Kristen Meier, FDA, CDRH *Vicki Petrides, Abbott Diagnostics Keywords: gray zone, equivocals, indeterminant, agreement How do you report results comparing two tests when both are considered qualitative but there are equivocal results (also called gray zone or indeterminate results) for either test? Most statisticians agree that equivocal results must be reported in the tables and included in agreement calculations. The question is how to include these results in the calculations and what should we call these measures? This presentation will address different ways these calculations are performed and how the different approaches can affect the conclusions regarding the performance of the tests relative to each other.
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Key Dates
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April 30 - May 22, 2013
Invited Abstract Submission Open -
June 4, 2013
Online Registration Opens -
August 9 - August 23, 2013
Invited Abstract Editing -
August 23, 2013
Short Course materials due from Instructors -
August 26, 2013
Housing Deadline -
September 9, 2013
Cancellation Deadline and Registration Closes @ 11:59 pm EDT -
September 16 - September 18, 2013
Marriott Wardman Park, Washington, DC