A Study Compares the Detection of Colon Polyps in 50

question 423

Multiple Choice

A study compares the detection of colon polyps in 50 subjects by using both CT colonography and conventional colonoscopy (gold standard) .  As a part of the study, 2 independent radiologists assess the CT images to diagnose polyps.  Each radiologist is blinded to the other radiologist's reading.  The kappa statistic for these raters is 0.73.  Which of the following does the kappa statistic best describe?

• A)Power
• B)Reliability
• C)Specificity
• D)Statistical significance
• E)Validity

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