Another potential source of bias: they allowed patients to self-select into treatment groupspic.twitter.com/vPI2Iah9Tw
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The bigger issue is that it is a gross misuse of population studies to inform personal or public health at all unless the hazard ratios are many multiples. This is why every day we see a study contradicting one from the day before. I wish dietitians knew & practised that.pic.twitter.com/CLJG3S2DkC
Would love to read what your thoughts on selection bias
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