Christopher U. Missling
Management
Yes. So let me quickly explain again what is done. The patients are randomized at the beginning on the trial to either receiving placebo or active arm. Those patients who then finish the 48 weeks will get blarcamesine, all of them. So those patients who started blarcamesine, but they were blinded to it, they didn't know, also stay blinded that when they receive blarcamesine if they were receiving blarcamesine in the previous 48 weeks. And they are called the continued blarcamesine or early start group. Those patients who now -- after they had placebo because they were randomized to placebo in the first 48 weeks, they now receive also blarcamesine. And what we now look at is the trajectory of the 2 arms, the early start group, which had blarcamesine since day 1 and those what we call late start group, which had blarcamesine after the placebo-controlled part. And what we find is that those patients who received the drug later after placebo first, they do not catch up to the benefit of those patients who had blarcamesine from day 1 in the previous 48 weeks. And that indicates that if you have Alzheimer's disease, you want to be not getting it too late because you will not get the full benefit of the drug. And the same applies for both cognition, ADAS-Cog13 and activities of daily living or function ADCS-ADL. What we noticed was because of COVID, though, there was not a perfect transition from the end of the trial of 48 weeks into the open-label extension because sites were shut down. And so the patient were just barely able to measure the last measure of 48 weeks, but the open label was not accessible until, in some cases, a year later. But those patients eventually then joined. And what we found was that we could basically separate 2 groups, those patients which were not impacted by COVID, so to speak, by this shutdown trial sites, and those received the drug right away in the active arm specifically. And those had the best performance among all candidates. And those patients who got the drug after a longer pause or drug holiday, we call it also or interruption, they did not benefit as much even if they had previously the drug in the active arm in the placebo-controlled part. So the message is here, the takeaway is twofold. First of all, what I already stated, you want to take the drug as soon as possible once you have an indication and diagnosis of Alzheimer's disease. And secondly, once you start taking blarcamesine, you want to continuously taking it and not interrupting for too long because that would also be not a perfect outcome to keep the cognition and function consistently better. And to answer your question about this difference between ADAS-Cog13 and ADL, I think because of these ADAS-Cog13 is more sensitive to immediate actions and ADL has a bit of maybe a latency, the ADL seems to be more smooth in their trajectory than the ADAS-Cog13. So the ADAS-Cog13 is just more sensitive possibly to these changes, which I just described. And the description in the conference in the graph on the slide shows clearly that those patients who were not interrupted or had a short interruption, they in the ADAS-Cog13, they had a clearly better outcome in the active arm than those who had interruption, what I just basically said a minute ago. I trust that helps to explain the difference.