They're conditional probabilities, Plenty. The HPV+ is irrelevant because it is true of the drugged and placebo arms, and the study is just comparing the difference in SOM incidence and duration between the two. (And there are some notable differences as we can see.) As for the median/mean confusion, yes a non-normal distribution would make that more relevant, but let's face it, unless the results distribution is heavily skewed or polarized, I would call that an irrelevancy too.
Good for Galera.
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