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Re:Exercise Tied to Lower Risk for Some Types of Cancer by jimrandomh on Thursday May 19, 2016 @03:59PM (#11733274)
I will add that this is the sort of thing that peer review theoretically ought to stop, or at least force authors to include caveats for. Unfortunately, studies with this sort of methodology make up most of the so-called studies published, so they can't really do that.
Re:Exercise Tied to Lower Risk for Some Types of Cancer by epistasis on Thursday May 19, 2016 @04:14PM (#11733410)
I haven't read the paper itself, but even if it didn't explicitly note these caveats, it would be assumed by any reader in its intended audience.

The problem is the press representation of the papers as something they're not.

These types of papers should be published, because they are necessary to decide which hypotheses to test with interventional studies.