mucho gracias dewophile for your comprehensive reply. your expertise is greatly appreciated and your explanations certainly helped clear up some things in my mind.
yes, slide 10 is a bit of an anomaly - the exceptional p statistic in the 3 month 25mg dose is clearly not being driven by the mean (which is less than the 12.5mg arm) but must be a result of a much lower standard deviation in the 3 month 25mg subset.
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