Logit function and table of specificity/sensitivity for specific probability cutoffs.

[Jennifer Xu]

Hi I have been using using the logit function to combine biomarkers and determine AUC’s for certain combinations. However, I can’t seem to figure out how to find specific sensitivity and specificity values for certain probability cutoff. I have used “lsens” which will graph the values. Is there any way to get a organized table of these values?

If there’s another way or better way also to combine biomarkers please let me know as well.

Thanks for the help.

[Rich Goldstein]

assuming that by "logit function" you mean that you are estimating a logit regression using the logit command, what you want is "estat classification" with the cutoff option; type

help estat classification

[Christian Otchia]

Do you mean this:

use auto
logit foreign price weight
estat classif 
estat classif, cutoff(0.7)

The default cut-off is 0.5. But you can use other probability cut-offs using the option cutoff.

[Jennifer Xu]

Oh yes I have been using that, I was just wondering if there is a way to generate a table of different cutoffs, similar to how they generate the lsens graph