Did they look at body fat composition?  It would seem to me (as a fat person)
that if you are fat, you are more likely to have pendulous breasts that are
"unacceptable" in public without firm support.  And there are already some
studies showing a strong connection between dietary fat intake and body fat
with breast cancer.  Could this be a major confounder that they have ignored?

J. Rachael Hamlet
Owner, Lactivist Mailing List
Author, The Breastfeeding Advocacy Page
http://www.clark.net/pub/activist/bfpage/bfpage.html