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A concordance correlation coefficient to evaluate reproducibility. (English) Zbl 0715.62114
Summary: A new reproducibility index is developed and studied. This index is the correlation between the two readings that fall on the 45$$\circ$$ line through the origin. It is simple to use and possesses desirable properties. The statistical properties of this estimate can be satisfactorily evaluated using an inverse hyperbolic tangent transformation. A Monte Carlo experiment with 5,000 runs was performed to confirm the estimate’s validity. An application using actual data is given.

##### MSC:
 62H20 Measures of association (correlation, canonical correlation, etc.) 62P10 Applications of statistics to biology and medical sciences; meta analysis
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