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Thread: Can sensitivity be calculated in non-binary variables?

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    Can sensitivity be calculated in non-binary variables?




    Hi everyone,

    Is there any analogous measure of sensitivity and specificity for non-binary variables?

    For example, if I want to study the sensitivity of a test that analyzes blood types (i.e. A, B, AB or 0) in comparison with a gold standard tet. What's the best way to do it?

    I have thought about doing 4 contingency tables, and in each one of them I can get a value of the test for that blood type. However, how can I translate the findings of each category to the test as a whole? I guess I can simply calculate the average sensitivity value, but is there any other possibility?

    Thanks in advance.

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    Re: Can sensitivity be calculated in non-binary variables?

    Non-binary but still categorical correct? I have seen the multiple contingency table approach. Not sure if you could weight and pool. If you come across any additional approaches please share.


    Example of multiple level for the screening tool:


    http://jnm.snmjournals.org/content/36/12/2380.full.pdf
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    Re: Can sensitivity be calculated in non-binary variables?


    Hi,
    Fleiss-kappa could be uswd I guess.

    regards

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