Never forget to consider the number needed to treat
How would you like to double your chances of winning the lottery? Just buy two tickets!
Statistically, this is true, but is that a reason to spend more money on something that most likely offers no return on investment?
Yet, in medical research, study after study shows impressive improvement in relative risk for this, that and the other intervention but a small or even negligible effect on absolute risk.
For example, I just …