Re: finding cutoff point for a continuous variable when outcome is binary.

["Im, Kelly" <im@edc.pitt.edu>]

Hello,

I have a binary (0 or 1) outcome variable and a continuous predictor
variable. When I look at the smoothing plots I don't see much
relationship between these two variables, i.e., plots give me almost a
horizontal line. nonetheless, we're try to find a cutoff point. I prefer
not to run such analysis, but seems to have no choice. most of things
I'm analyzing is exploratory in a sense. 

So, I'm using CART (classification and regression trees) to see if I can
pick up some useful cutoff points. but CART gives me a best tree  with
40 some end nodes, which is not so useful for us. .. I'm wondering if
there are other ways to look at this data. 
or I should stop here.  I would appreciate any advice,

kelly