I think that it is the usual context missing sound bites from Anavex that raises more questions and that really annoys me. It is annoying because Anavex should understand that it will annoyed anyone with a good understanding biotech statistics and only fools the fools who can't get past a headline and soundbites.
Then again so far it is only a conference abstract.
Because the OLE by definition does not use a placebo, Anavex cannot use a stat sig framework, so it looks like they instead settled on the phrase "significantly benefits."
"Significant benefits" means that the positive outcomes or advantages are large and noticeable, and may have a meaningful impact. The words "significant" and "benefit" are often used together, where "significant" means important, and "benefit" means a helpful or good effect.