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Sure, and another way to get a zero correlation is if you arrange all the data points evenly around a circle. Are you seriously suggesting that authors who too
by legerdemain 6y ago
Sure, and another way to get a zero correlation is if you arrange all the data points evenly around a circle.
Are you seriously suggesting that authors who took the energy to get a manuscript reviewed and published in a BMJ publication wouldn't examine a scatter plot or check the estimate of a quadratic trend that their analysis software almost certainly outputs?
- curiousgal 6y agoMy point pertains to the conclusion the public might draw from the study. Just because Vitamin D is uncorrelated with Covid severity does not necessarily mean that they are not related. Same way Y depends on X but is uncorrelated with it.
- legerdemain 6y agoYes, and my point is that for your point to be relevant, the authors would have to exhibit a negligence that borders on the fantastical. No one would look at a significant quadratic trend in the data and say, "Nope, not gonna publish that juicy nugget!"