Neuromod did NOT say they will use a placebo. It was commented on the paper (by a third party) saying they hoped a further paper will have a placebo. Just something positive to think about; although 80% reported improvement; 67% reported clinically significant improvement. That would be pretty hard for such a high number of a placebo.
I would say though basing things like 1/5 aren't going to get relief is depending on too much of the results that would represent the whole population. How can 500 people be representative of the millions of us with subjective tinnitus worldwide? It just isn't.
I am more concerned why a tonal tinnitus tone had to be part of the inclusion criteria for the TENT-A2 if it demonstrated effectiveness for (tonal/intonal) etc.
To comment on the trials, if you haven't already looked, TENT-A1 had 3 arms (P1, P2, P3).
It looks as if TENT-A2 has 9 arms (P1, P2, P3 ,P4,...P9).
They are swooping arms after 6 weeks. Again, we still don't know if they have learnt anymore from the latest TENT-A2 trial - such as if they have further got indication they can improve efficacy/if it was a fluke in terms of longer lasting efficacy/who it may not work for etc etc.
As far as I'm aware, during the interview, Dr. Ross O'Neill has only commented on the data from the TENT-A1. Remember the TENT-A2 has a further 192 patients divided between 80:80:16:16. Even though the study is entirely finished they should have data coming in.