NiceCupOfTea said...
Pluot said...
The researchers come up with traits that they want everyone in the study to have and traits that would exclude that person from participating in the study. Any study will describe exactly what these are. An example of what you might see in such a j-pouch study would be: everyone in the study underwent j-pouch surgery; patients were excluded from the study if they had infectious colitis.
That's the sort of thing they do in antidepressant trials; patients who are too depressed are excluded from them for example. There's other tricks that are used to get positive results, but I have no memory left, so I can't describe them. Exclusion criteria are used to make sure that the study is useful, not to falsify results. The kinds of depression studies you're referring to are why commercials for those drugs will say something like "led to an improvement in mild to moderately depressed patients." There is no misrepresentation -- if severely depressed patients were excluded from the study, then the results are reported as only being relevant to mild to moderately depressed patients.
For j-pouch studies, it's often helpful to exclude patients who have other diseases that would make their outcomes irrelevant for considering success of j-pouch in IBD patients. For example, infectious colitis is completely different from UC and Crohn's -- it's caused by a pathogen instead of an autoimmune problem. As a result, those patients tend to have much
better j-pouch outcomes. Excluding them from a study probably makes the results look a little worse, but it makes the results of the study much more useful for IBD patients.
If you believe that humans are basically bad and everyone is out to trick you, then I'm sure I can't change your mind. But the truth is that a huge amount of thought and effort goes into developing studies so that they are fair, useful, and relevant. No one owns a patent on the j-pouch. Believe it or not, many researchers do this just because they want to improve the lives of other people.
OP, sorry for the derail.