Bias refers to elements that the study has failed to control for which may have influenced the outcome of the study For example, if the study had more dropouts in the intervention group, then it may have been biased
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If we look at industry funded trials, they are almost never negative (i.e. no benefit for the funding body) It turns out that often, the negative trials just aren't published!
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So individual trials can be very good - meaning that industry funding isn't necessarily an issue for individual trials - but they still make a misleading picture overall
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If you're interested in this issue, you should follow
@senseaboutsci who are doing great work getting studies registered and publishedShow this thread -
So ultimately, saying "the industry funded this trial" doesn't necessarily mean much in terms of its quality What it does say is that you should be looking for more research overall because there may be unpublished work contradicting the findings
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End of conversation
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