4 ms·
Do you really need a control group for this kind of study? The growth of cancer has been studied for well over a century, with millions of cases; what would a
by mcswell 4y ago
Do you really need a control group for this kind of study? The growth of cancer has been studied for well over a century, with millions of cases; what would a hundred more (to take a random number) tell you? (BTW, this is a real question, not a sarcasm!)
- yourMadness 4y agoThe control group is needed to measure process properties / systematic error. It does not need to be a placebo group. Previous data at the same hospital does not help because the regular medicine does not run according to study protocols.