A smoke-free discussion of confounding.

I wanted to talk about confounding in observational studies.  Early on, I made a promise to myself: the example I was going to use would not involve smoking, drinking and lung cancer.  The result?  A treatise on confounding using taco's, mud runs, and zest for life.  Clearer?  Probably not.  But way more fun. Take a look at the full post on medpagetoday.com here.