There has been an academic initiative as researchers propose that more and more attention and activity should be attributed to multi-arm clinical trials. In contrast to the conventional two-arm trials with one variable compared to the other, these multi-arm trials would be instrumental in getting more outcome comparing several things together. This will enable researchers to arrive at fruitful conclusions more likely and that too saving time and money.
Parmar MKB, Carpenter J, Sydes MR. More multiarm randomised trials of superiority are needed. Lancet. 2014;384(9940):283-4.
Adrian O’Dowd. Scientists call for more multi-arm clinical trials to speed up approval of new drugs. BMJ. 2014;349:g4812.