Originally Posted by baloney_detector

The problem with "all of these studies", at least a good number of them, is that they rely heavily on people telling the truth.

Simply put, a case-control study is inherently biased.

And furthermore, because of this fact, some conclusion that women are 30% more at risk for developing breast cancer for WHATEVER reason is bound to be a smaller change from the norm than the error in measurement of the type of study used.

In short, this 30% greater at risk concluson is a useless conclusion because its the equivalent of saying that women are 30% at greater risk for developing breast cancer after an induced abortion...+/- 50% based on the measurement error of the study.

Find a study with less inherent measurement error to find a correlation between the two to demonstrate a link between induced abortion and breast cancer...and then you might have something realistic to talk about.