Dr. Marzo-Ortega noted that the study had only been powered to show a difference between the active treatment and placebo, and not between the two doses, and that, looking at the speed of response, a difference from placebo was already being seen by week 2 “and certainly by week 4,” indicating an early effect. Data from the trial at 52 weeks are being analyzed and should be available soon, she said.
Another efficacy measure used was the percentage of patients achieving minimum disease activity at week 24. “These are stringent criteria to achieve: Five of seven criteria need to be met,” Dr. Marzo-Ortega said. “This was achieved by almost 30% of patients on the 4-weekly dose,” and by 24% on the 2-weekly dose, but by just 3% of those given placebo.
“One of the remarkable things is that nearly a third [of patients] achieved PASI [Psoriasis Area Severity Index] 100 by week 24, which is complete resolution of skin psoriasis,” she said. This is one of the first times this type of skin response has been seen in a psoriasis trial, she noted.
However, there was little difference between the active treatment and placebo arms in terms of the percentage of patients seeing a response on enthesitis, and only the dose taken every 4 weeks had a significant benefit over placebo in terms of improving dactylitis.